Tiêu chuẩn iso 00683 1 2016

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INTERNATIONAL
STANDARD

ISO
683-1
Third edition
2016-07-01

Heat-treatable steels, alloy steels and
free-cutting steels —

Part 1:

Non-alloy steels for quenching and
tempering·
Aciers pour traitement thermique, aciers alliés et aciers pour
décolletage —
Partie 1 : Aciers non alliés pour trempe et revenu

Reference number
ISO 683-1:2016(E)
© ISO 2016

ISO 683-1:2016(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland

All rights reserved. Unless otherwise specified, no part o f this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country o f

the requester.

ISO copyright o ffice

Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47

www.iso.org

ii

© ISO 2016 – All rights reserved

ISO 683-1:2016(E)

Page

Contents

Foreword .......................................................................................................................................................................................................................................... v
1
2

3
4

Scope ................................................................................................................................................................................................................................. 1
Normative references ...................................................................................................................................................................................... 2

Terms and definitions ..................................................................................................................................................................................... 3
Classification and designation ............................................................................................................................................................... 3
4. 1

4.2
5

6

............................................................................................................................................................................................. 3
Designation ................................................................................................................................................................................................ 3
C las s ificatio n

Information to be supplied by the purchaser......................................................................................................................... 3

................................................................................................................................................................... 3
.................................................................................. 4
5.3 Ordering example ................................................................................................................................................................................. 4
Manufacturing process .................................................................................................................................................................................. 4
6.1 General ........................................................................................................................................................................................................... 4
6.2 Deoxidation ................................................................................................................................................................................................ 5
f
......................................................................... 5
................................................................................................................................ 5
6.3.2 Particular heat-treatment condition............................................................................................................... 5
6.3.3 Particular surface conditions ................................................................................................................................ 5

..................................................................................................................................................................... 5
f
Requirements .......................................................................................................................................................................................................... 5
............................................................. 5
7.1.1 General...................................................................................................................................................................................... 5
7.1.2 Chemical composition ................................................................................................................................................. 5
7.1.3 Mechanical properties ................................................................................................................................................ 5
...................................................................................................................................................................... 6
7.1.5 Surface hardness .............................................................................................................................................................. 6
............................................................................................................................................................................................ 6
.................................................................................................................................................................................... 6
7.4 Grain size ...................................................................................................................................................................................................... 6
7.5 Non-metallic inclusions ................................................................................................................................................................... 7
7.5.1 Microscopic inclusions ............................................................................................................................................... 7
7.5.2 Macroscopic inclusions .............................................................................................................................................. 7
7.6 Internal soundness .............................................................................................................................................................................. 7
f
......................................................................................................................................................................................... 7
7.8 Decarburization ..................................................................................................................................................................................... 7
7.9 Shape, dimensions and tolerances ......................................................................................................................................... 8
Inspection .................................................................................................................................................................................................................... 8
f
................................................................................................................ 8
f
........................................................................................................................................................................... 8
.................................................................................................................................................. 8
f
.......................... 8
8.3.2 Visual and dimensional inspection .................................................................................................................. 9
Test methods ............................................................................................................................................................................................................. 9

C hemical co mp o s itio n, mechanical p ro p erties and hardenab ility

7.1 .4

8

the cas t

H ardenab ility

7.2

M achinab ility

7.3

C o ld s hearab ility

7.7

S ur ace quality

8.1

Tes ting p ro cedures and typ es o

8.2

Frequency o

8.3

S p ecific ins p ectio n and tes ting
8.3 .1

9

N o rmal co nditio n at delivery

do cuments

tes ting

Verificatio n o

the hardenab ility, hardnes s and mechanical p ro p erties

9.1

C hemical analys is

9.3

H ardnes s and hardenab ility tes ts

9.3 .2

Verificatio n o

© ISO 2016 – All rights reserved

hardenab ility

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ISO 683-1:2016(E)

9.4
10

Retests ......................................................................................................................................................................................................... 10

Marking ....................................................................................................................................................................................................................... 10

(normative) Ruling sections for mechanical properties ....................................................................................... 30
Annex B (normative) Supplementary or special requirements ............................................................................................ 34
Annex C (informative) Designation of steels given in this part of ISO 683 and of comparable
Annex A

grades covered in various designation systems ................................................................................................................ 36

(informative)

Annex D
Dimensional standards applicable to products complying with this
part of ISO 683 ..................................................................................................................................................................................................... 38
Bibliography ............................................................................................................................................................................................................................. 39

iv

© ISO 2016 – All rights reserved

ISO 683-1:2016(E)

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work o f preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters o f
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
di fferent types o f ISO documents should be noted. This document was dra fted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f
patent rights. ISO shall not be held responsible for identi fying any or all such patent rights. Details o f
any patent rights identified during the development o f the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is in formation given for the convenience o f users and does not

constitute an endorsement.

For an explanation on the meaning o f ISO specific terms and expressions related to con formity assessment,

as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 17, Steel, Subcommittee SC 4, Heat treatable and
alloy steels.
This third edition cancels and replaces the second edition (ISO 683-1:2012), of which it constitutes a
minor revision.
ISO 683 consists of the following parts, under the general title Heat-treatable steels, alloy steels and freecutting steels:
— Part 1: Non-alloy steels for quenching and tempering
— Part 2: Alloy steels for quenching and tempering
— Part 3: Case-hardening steels
— Part 4: Free-cutting steels
— Part 5: Nitriding steels
— Part 14: Hot-rolled steels for quenched and tempered springs
— Part 15: Valve steels for internal combustion engines
— Part 17: Ball and roller bearing steels
— Part 18: Bright steel products

© ISO 2016 – All rights reserved

v

INTERNATIONAL STANDARD

ISO 683-1:2016(E)

Heat-treatable steels, alloy steels and free-cutting steels —

Part 1:

Non-alloy steels for quenching and tempering·
1 Scope
T h i s p a r t o f I S O 6 8 3 s p e ci fie s the te ch n ic a l del iver y re qu i rements

—

s em i-fi ni s he d pro duc ts , ho t

forme d,

for

e . g. blo om s , bi l le ts , s lab s (s e e No te 1) ,

— bars (see Note 1),
— wire rod,
—

fi n i she d fl at pro duc ts , a nd

— hammer or drop forgings (see Note 1)
manu fac tu re d

from

the

d i re c t harden i ng non-a l loy s te el s

a nd

the

non- a l loy fla me -

and

i nduc tion-

hardening steels listed in Table 3 and supplied in one of the heat-treatment conditions given for the
ff
f
Table 1 and in one of the surface conditions given in Table 2.
The steels are, in general, intended for the manufacture of quenched and tempered or austempered
(see 3.2
Tables 9 and 11), but can also
Table 10).
The requirements for mechanical properties given in this part of ISO 683 are restricted to the sizes
given in Tables 9 and 10.
di

erent typ e s o

pro duc ts i n

and No te 2 ) a nd fla me - or i nduc tion-h ardene d mach i ne p ar ts (s e e

b e p ar tly u s e d i n the norma l i z e d cond ition (s e e

NO TE 1

H a m mer- forge d

s em i-fi n i s he d

h a m mer- forge d b a rs a re , i n the

“hammer and drop forgings”.

fol lowi ng ,

pro duc ts

( b lo om s ,

bi l le ts ,

s l ab s ,

e tc .) ,

s e a m le s s

ro l le d

r i ngs

a nd

co vere d u nder s em i-fi n i s he d pro duc ts or b a rs a nd no t u nder the ter m

NO TE 2

Fo r the p u r p o s e s o f s i mp l i fic atio n , the ter m “quenche d a nd temp ere d” i s , u n le s s o ther wi s e i nd ic ate d ,

NO TE 3

Fo r I nter n atio n a l S ta nd a rd s

used in the following also for the austempered condition.
rel ati n g to

s te el s

compl yi ng with the re qu i rements

fo r

the chem ic a l

composition in Table 3, however, supplied in other product forms or treatment conditions than given above or
i ntende d

NO TE 4

fo r

s p e c i a l ap p l ic atio n s , a nd

fo r

o ther rel ate d I ntern ation a l S ta nda rd s , s e e the B ib l io grap hy.

T h i s p a r t o f I S O 6 8 3 do e s no t app l y to b r ight p ro duc ts a nd b a rs a nd wi re ro d

such products, see ISO 683-18 and ISO 4954.

for

cold he ad i ng. For

I n s p e c i a l c a s e s , va ri ation s i n the s e te ch n ic a l del iver y re qui rements or add ition s to them c an

form

the

s ubj e c t o f a n agre ement b e twe en the ma nu fac tu rer and pu rcha s er at the ti me o f enqu i r y a nd order

(see 5.2 and Annex B).

I n add ition to th i s p ar t o f I S O 6 8 3 , the genera l te ch n ic a l del iver y re qu i rements o f I S O 4 0 4 are appl ic able .

© ISO 2016 – All rights reserved

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ISO 683-1:2016(E)

2
T he

Normative references
fol lowi ng

i nd i s p en s able

do c u ments , i n whole or i n p a r t, are normatively re ference d i n th i s do c ument a nd a re

for

its

appl ic ation .

For date d re ference s ,

on ly the

e d ition c ite d appl ie s .

For u ndate d

re ference s , the late s t e d ition o f the re ference d do c u ment (i nclud i ng any a mend ments) appl ie s .

ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method
ISO 377, Steel and steel products — Location and preparation ofsamples and test pieces for mechanical testing
ISO 404:2013, Steel and steel products — General technical delivery requirements
ISO 642, Steel — Hardenability test by end quenching (Jominy test)
ISO 643, Steels — Micrographic determination of the apparent grain size
ISO 3887, Steels — Determination of depth of decarburization
ISO 4885:—1) , Ferrous products — Heat treatments — Vocabulary
ISO 4948-1:1982, Steels — Classification — Part 1: Classification of steels into unalloyed and alloy steels
based on chemical composition

ISO 4948-2, Steels — Classification — Part 2: Classification of unalloyed and alloy steels according to main
quality classes and main property or application characteristics

ISO/TS 4949, Steel names based on letter symbols
ISO 4967, Steel — Determination of content of non-metallic inclusions — Micrographic method using
standard diagrams

ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H,

K, N, T)

ISO 6892-1, Metallic materials — Tensile testing - Part 1: Method of test at room temperature
ISO 6929, Steel products — Vocabulary
ISO 7788, Steel — Surface finish of hot-rolled plates and wide flats — Delivery requirements
ISO 9443, Heat-treatable and alloy steels — Surface quality classes for hot-rolled round bars and wire
rods — Technical delivery conditions

ISO 10474, Steel and steel products — Inspection documents

ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical
composition

ISO 18265, Metallic materials — Conversion of hardness values

1) Under preparation. Stage at the time of publication: ISO/DIS 4885:2016.
2

© ISO 2016 – All rights reserved

ISO 683-1:2016(E)

3 Terms and definitions

For the purposes o f this document, the terms and definitions given in ISO 377, ISO 4885, ISO 4948-1,
ISO 4948-2, ISO 6929, and ISO 14284 and the following apply.
NOTE

For deviations from these terms and definitions, see Notes 1 and 2 o f Clause 1.

3.1
ruling section

section for which the specified mechanical properties apply
Note 1 to entry: Independent o f the actual shape and dimensions o f the cross-section o f the product, the size o f its
ruling section is always given by a diameter. This corresponds to the diameter o f an “equivalent round bar”. That

is a round bar which will show the same cooling rate as the actual ruling section of the product concerned at its
position for taking the test pieces, when being cooled from austenitizing temperature.

3.2
austempering

isothermal heat treatment for producing bainitic or ausferritic structure of a work piece
Note 1 to entry: The final cooling to ambient temperature is not at a specific rate.
[SOURCE: ISO 4885:—2) , 3.11]
3.3
non-alloy steel

as defined in ISO 4948-1:1982, 3.1.2
4 Classification and designation
4.1 Classification

The classification o f the relevant steel grades is according to ISO 4948-1 and ISO 4948-2. Steel grades
C25, C35, C40, C45, C50, C55 and C60 are non-alloy quality steels. All other steel grades covered by this
part o f ISO 683 are non-alloy special steels.
4.2

Designation

For the steel grades covered by this part o f ISO 683, the steel names, as given in the relevant tables, are

allocated in accordance with ISO/TS 4949.
5
5.1

Information to be supplied by the purchaser
Mandatory information

The manu facturer shall obtain the following in formation from the purchaser at the time o f enquiry

and order:

a) quantity to be delivered;
b) designation o f the product form (slab, bloom, billet, round bar, wire rod, wide flat, sheet, plate, strip,

forging, etc.)
c) either the designation of the dimensional standard and the dimensions and tolerances selected
from this (see 7.9) or, for example in the case of drop forgings, the designation of the drawing or any
other document covering the dimensions and tolerances required for the product;

2) Under preparation. Stage at the time of publication: ISO/DIS 4885:2016.
© ISO 2016 – All rights reserved

3

ISO 683-1:2016(E)

d) re ference to this part o f ISO 683, i.e. ISO 683-1;

e) designation of the steel grade, as given in Table 3 ;
f

) standard designation for a test report 2.2 or, i f required, any other type o f inspection document in

accordance with ISO 10474 or another standard (e.g. regional standards EN 10204 or JIS G 0415).

5.2

Options and/or supplementary or special requirements

Several options are specified in this part o f ISO 683 and listed below. I f the purchaser does not indicate
any o f these options, the products will be supplied in accordance with the basic specifications defined

in this part of ISO 683 (see 5.1):

a) i f a heat-treatment condition other than the untreated condition is required, the symbol for this
other condition (see Table 1 , column 2);
b) i f another sur face condition than “hot worked” or a special sur face quality is required, the sur face
condition (see Table 2 ) and the surface quality (see 7.7 );
c) any requirement for the hardenability (+H, +HH, +HL) for special steels (see 7.1.4 and Tables 5 to 7 );

d) any supplementary requirement that shall be complied with, the symbol and, where necessary, the
details o f this supplementary requirement (see Annex B );
e) any requirement for the verification o f non-metallic inclusion content (see 7.5 );
f

) verification o f hardenability and, i f agreed, the in formation about calculation o f the hardenability
(see 9.3.2 );

g) any requirement regarding the permissible depth o f decarburization (see 7.8 );

h) suitability o f bars and rod for bright drawing (see 7.7.4);
i)
j)

5.3

any requirement relating to the removal o f sur face de fects (see 7.7.5 );

hardness testing instead o f tensile testing for normalized finished flat products in

thicknesses >10 mm for plates or >100 mm for bars (see 7.1.3) (in this case, hardness limits should
be agreed).
Ordering example

EXAMPLE

Fi fty hot-rolled round bars according to ISO 1035-1 with a nominal diameter o f 40 mm and a

nominal length of 8 000 mm, with diameter tolerance according to class S and with length tolerance according to
class L2 of ISO 1035-4 made of steel grade ISO 683-1, C45E (see Table 3) in the heat treatment condition +N (see
Table 1), surface blast cleaned (+BC) (see Table 2 ), product analysis/option B.5 with an inspection certificate 3.1
according to ISO 10474:
50 round bars ISO 1035 – 40,0S × 8 000L2
ISO 683-1 – C45E+N+BC option B.5
ISO 10474 – 3.1

6 Manufacturing process
6.1

General

The manu facturing process o f the steel and o f the products is with the restrictions given by the

requirements in 6.2 to 6.4 left to the discretion of the manufacturer.
4

© ISO 2016 – All rights reserved

ISO 683-1:2016(E)

For minimum reduction ratio or minimum thickness deformation ratio of rolled and forged products,
see B.6.
6.2 Deoxidation

All steels shall be deoxidized.
6.3 Heat-treatment condition and surface condition at delivery
6.3.1 Normal condition at delivery
Un le s s

o ther wi s e

agre e d at the

ti me

untreated, i.e. hot-worked condition.

o f enqu i r y a nd order,

the

pro duc ts

s ha l l

be

del ivere d i n the

6.3.2 Particular heat-treatment condition
I f s o agre e d at the ti me o f enqu i r y a nd order, the pro duc ts sh a l l b e del ivere d i n one o f the he at-tre atment

conditions given in Table 1, lines 3 to 7.

6.3.3 Particular surface conditions
I f s o agre e d at the ti me o f enqui r y a nd order, the pro duc ts sh a l l b e del ivere d i n one o f the p a r tic u lar

surface conditions given in Table 2, lines 3 to 6.
6.4 Traceability of the cast

Each product shall be traceable to the cast (see Clause 10).

7 Requirements
7.1 Chemical composition, mechanical properties and hardenability
7.1.1 General

Table 1

s hows the combi nation s o f u s ua l he at-tre atment cond ition s at del iver y, pro duc t

form s

a nd

Tables 3 to 11.
Except where steels are ordered in the quenched and tempered condition, this part of ISO 683 makes
re qu i rements a s s p e c i fie d i n

for

the s te el typ e s 2 3 M n6 , 2 8 M n6 , 3 6M n6 a nd 42 M n6 , and

for

the non- a l loy s p e ci a l s te el s with c arb on

contents e qua l to or h igher tha n the contents o f typ e C 3 5 provi s ion s to b e s uppl ie d with or without
hardenabi l ity re qu i rements (s e e

Table 1, columns 8 and 9).

7.1.2 Chemical composition

Table 3.

T he chem ic a l comp o s ition de term i ne d by c as t ana lys i s s ha l l comply with the va lue s i n

Perm i s s ible deviation s b e twe en the l i m iti ng va lue s

are given in Table 4.

for

c a s t ana lys i s a nd the va lue s

for

pro duc t a na lys i s

T he pro duc t ana lys i s s ha l l b e c a rrie d out when s p e c i fie d at the ti me o f the enqui r y and order (s e e

B.5).

7.1.3 Mechanical properties
Where

the

s te el

is

ordere d

prop er tie s s p e ci fie d i n

without ha rdenabi l ity re qu i rements ,

Tables 8, 9 or 10

app ly a s appropri ate

I n th i s c a s e, the ha rdenabi l ity va lue s given i n

© ISO 2016 – All rights reserved

Table 5 f

the

re qu i rements

for

me ch an ic a l

for the p ar tic u la r he at-tre atment cond ition .

or s p e ci a l s te el s a re

for

gu idance pu rp o s e s on ly.

5

ISO 683-1:2016(E)
The mechanical property values given in Tables 9 and 10 apply to test pieces in the quenched and
tempered or normalized condition, which have been taken and prepared in accordance with Figure 2 or
Figures 3 and 4 (see also footnote a to Table 1).
For steel plates of thickness >10 mm and bars >100 mm in diameter in the normalized condition (+N),
it may be agreed at the time o f enquiry and order that instead o f the tensile test, the hardness test
is performed at the same region where the sample for the tensile test piece would be taken from.
The hardness test should be performed and, from this, the tensile strength values can be calculated
according to ISO 18265. The calculated tensile strength shall comply with Table 10.

7.1.4 Hardenability

Where the steel is ordered using the designations given in Table 5, 6 or 7 to normal (see Table 5) or
to narrowed (see Tables 6 and 7 ) hardenability requirements, the values of hardenability given in
Table 5, 6 or 7, respectively, apply in addition to the requirements cited in Table 1, columns 9.1 and 9.2
(see footnote b to Table 3).
7.1.5 Surface hardness
For the sur face hardness o f special steels a fter flame or induction hardening, the specifications in

Table 11 apply.

7.2 Machinability
All steels are machinable in the condition “so ft annealed”. Where improved machinability is required,
grades with a specified sul fur range and/or with a specific treatment should be ordered to improve
machinability (see also Table 1, line 7).

7.3 Cold shearability
7.3.1 Under suitable shearing conditions (avoiding local stress peaks, preheating, application of blades
with a profile adapted to that o f the product, etc.), all steels are cold shearable in the so ft annealed (+A)

condition.

7.3.2 Steel grades C45, C50, C55, C60, 28Mn6, 36Mn6 and 42Mn6 and the corresponding E-, R-, +H-,

+HH- and +HL grades (see Tables 3 and 5 to 7) are, under suitable conditions, also cold shearable when
being delivered in the condition “treated to improve shearability (+S)” with the hardness requirements
given in Table 8.
7.3.3 Steels C25, C30, C35, C40 and 23Mn6 and the corresponding E-, R-, +H-, +HH- and +HL-grades

(see Tables 3 and 5 to 7) are, under suitable conditions, cold shearable when being delivered in the

untreated condition.
Cold shearablity may also be assumed for the various grades o f steel C45, in sizes o f 80 mm and greater

in the untreated condition.
7.4 Grain size

Unless otherwise agreed at the time o f enquiry and order, the grain size shall be le ft to the discretion o f
the manu facturer. I f a fine grain structure is required in accordance with a re ference treatment, special

requirement B.3 shall be ordered.

I f steels C35E, C35R, C45E, C45R, C50E, C50R, C55E and C55R are intended for flame or induction

hardening, special requirement B.3 shall be ordered in any case.

6

© ISO 2016 – All rights reserved

ISO 683-1:2016(E)

7.5

Non-metallic inclusions

7.5.1

Microscopic inclusions

The special steels shall have a certain degree o f cleanness; however, verification o f the non-metallic
inclusion content requires a special agreement. I f there is such an agreement at the time o f enquiry

and order, the microscopic non-metallic inclusion content shall be determined to an agreed procedure
and within agreed limits in accordance with ISO 4967 or another standard (e.g. regional standards
EN 10247 or JIS G 0555).
For grades with specified minimum sul fur content, the agreement should not include sulphides.

7.5.2

Macroscopic inclusions

This requirement is applicable to the verification o f the macroscopic inclusions in special steels. I f
verification is agreed, the method and acceptance limits shall be agreed at the time o f enquiry and order.
7.6 Internal soundness

Where appropriate, requirements relating to the internal soundness of the products shall be agreed at

the time o f inquiry and order (see B.4).
7.7

Surface quality

7.7.1

All products shall have a smooth surface finish appropriate to the manufacturing processes

7.7.2

Minor surface imperfections, which also may occur under normal manufacturing conditions,

7.7.3

Bars and wire rod shall be delivered with surface class 1za2 according to ISO 9443 and hot-rolled

applied.

such as prints originating from rolled-in scale, are not to be regarded as defects.

plates and wide flats shall be delivered with surface according to ISO 7788, unless otherwise agreed at
the time o f enquiry and order.
Where no International Standard on the sur face quality o f steel products exists, detailed requirements
re ferring to this characteristic shall, where appropriate, be agreed at the time o f enquiry and order.
It is more di fficult to detect and eliminate sur face discontinuities from coiled products than from cut
lengths. This should be taken into account when agreements on sur face quality are made.
I f suitability o f bars and rod for bright drawing is required, this shall be agreed at the time o f
enquiry and order.
7.7.4
7.7.5

The removal o f surface de fects by welding shall only be permitted with the approval o f the

customer or his/her representative.
If surface discontinuities are repaired, the method and maximum depth of removal shall be agreed at
the time o f enquiry and order.
7.8 Decarburization

Requirements relating to the permissible depth o f decarburization may be agreed at the time o f enquiry

and order.

The depth of decarburization shall be determined in accordance with the micrographic method
specified in ISO 3887.

© ISO 2016 – All rights reserved

7

ISO 683-1:2016(E)

7.9

Shape, dimensions and tolerances

T he s hap e, d i men s ion s and tolera nce s o f the pro duc ts sha l l comply with the re qui rements agre e d at
the ti me o f enqu i r y a nd order. T he agre ements sh a l l , a s

International Standards (see Annex D

fa r

a s p o s s ible, b e b a s e d on corre s p ond i ng

) ; o ther wi s e, on s u itab le nationa l s ta nda rd s .

8 Inspection
8.1

Testing procedures and types of documents

8.1.1

Pro ducts co mp lying with this p art o f I S O 6 8 3 s hall b e o rdered and delivered with o ne o f the

ins p ectio n do cuments as s p ecified in I S O 1 0 47 4 (o r acco rding to ano ther regio nal s tandard, e. g. E N 1 0 2 0 4
o r J I S G 0 41 5 ) . The typ e o f do cument s hall b e agreed up o n at the time o f enquiry and o rder. I f the o rder
do es no t co ntain any s p ecificatio n o f this typ e, a tes t rep o rt 2 . 2 s hall b e is s ued.

8.1.2

I f, in acco rdance with the agreements made at the time o f enquiry and o rder, a tes t rep o rt 2 . 2 is

to be provided, this shall cover the following information:
a)

con fi rmation th at the materia l compl ie s with the re qu i rements o f the order;

b)

re s u lts o f the c a s t ana lys i s

8.1.3

for

a l l elements s p e ci fie d i n

Table 3 for the steel grade concerned.

I f, in acco rdance with the agreements in the o rder, an ins p ectio n certificate 3 . 1 o r 3 . 2 is to b e

p rovided, the s p ecific ins p ectio ns and tes ts des crib ed in

8.3 and Clause 9 shall be carried out and the

res ults s hall b e co nfirmed in the ins p ectio n certificate.

I n add ition, the i n s p e c tion cer ti fic ate s ha l l cover

a)

con fi rmation th at the materia l compl ie s with the re qu i rements o f the order,

b)

re s u lts o f the c a s t ana lys i s

c)

re s u lts o f a l l i n s p e c tion s and te s ts ordere d by s upp lementar y re qu i rements (s e e

d)

for

a l l elements s p e ci fie d i n

Table 3 for the steel grade concerned,
Annex B), and

the s ymb o l , le tters o r nu mb ers rel ati ng the i n s p e c tio n cer ti fic ate , te s t p ie ce s a nd p ro duc ts to

each other.

8.2

Frequency of testing

T he amou nt o f te s ti ng , the s ampl i ng cond ition s and the te s t me tho d s to b e app l ie d

the requirements shall be in accordance with the requirements of Table 12.

for the

veri fic ation o f

8.3 Specific inspection and testing
8.3.1

Verification o f the hardenability, hardness and mechanical properties

For s te el s b ei ng ordere d without hardenabi l ity re qu i rements , i . e . without the s ymb ol, +H , +H H or +H L

in the designation, the hardness requirements or mechanical properties given for the relevant heattreatment condition in Table 1
f
The requirements given in footnote a of Table 1 (mechanical properties of reference test pieces), shall
f
B.1 or B.2 is ordered.
Tables 5 to 7), unless
Tables 5, 6 or 7

, colu m n 8 , s ub colu m n 8 . 2 , sha l l, with the

on ly b e veri fie d i

ol lowi ng excep tion, b e veri fie d .

a s upplementa r y re qui rement s p e ci fie d i n

For s te el s b ei ng ordere d with the s ymb ol +H , +H H or +H L i n the de s ignation (s e e

o ther wi s e agre e d, on ly the h ardenabi l ity re qui rements accord i ng to

8

are to b e veri fie d .

© ISO 2016 – All rights reserved

ISO 683-1:2016(E)
8.3.2 Visual and dimensional inspection
A su fficient number o f products shall be inspected to ensure compliance with the specification.

9 Test methods
9.1 Chemical analysis
The choice o f a suitable physical or chemical analytical method for the analysis shall be at the discretion
o f the manu facturer. In cases o f dispute, the method for product analysis used shall be agreed taking

into account the relevant existing International Standards.
NOTE

The list o f available International Standards on chemical analysis is given in ISO/TR 9769.

9.2 Mechanical tests
9.2.1 Tensile test

The tensile test shall be carried out in accordance with ISO 6892-1.
For the specified yield strength in the tables o f mechanical properties in this part o f ISO 683, the upper
yield strength, ReH , shall be determined.
I f a yield phenomenon is not present, the 0,2 % proo f strength, Rp0,2 , shall be determined.

9.2.2 Impact test

The impact test shall be carried out in accordance with ISO 148-1.
The average values o f a set o f three test pieces shall be equal to or greater than the specified value. One
individual value may be below the specified value, provided it is not less than 70 % o f that value.
I f these conditions are not satisfied, additional tests can be done according to ISO 404:2013, 8.3.4.2.

9.3 Hardness and hardenability tests
9.3.1 Hardness in treatment conditions +A and +S
For products in treatment conditions +A (so ft-annealed) and +S (treated to improve shearability), the

hardness shall be measured in accordance with ISO 6506-1.
9.3.2

Verification o f hardenability

Whenever available, the manu facturer has the option to veri fy the hardenability by calculation. The
calculation method is le ft to the discretion o f the manu facturer. I f agreed at the time o f enquiry and
order, the manu facturer shall give su fficient in formation about the calculation for the customer to

confirm the result.
I f a calculation formula is not available or in the case o f dispute, an end quench hardenability test
shall be carried out in accordance with ISO 642. The temperature for quenching shall comply with the

relevant tables in this part of ISO 683. The hardness values shall be determined in accordance with
ISO 6508-1, scale C.
9.3.3 Surface hardness

The sur face hardness o f steels a fter flame and induction hardening (see Table 11) shall be determined

in accordance with ISO 6508-1, scale C.
© ISO 2016 – All rights reserved

9

ISO 683-1:2016(E)
9.4 Retests
Re te s ts

for

s te el s

for

quench i ng and temp eri ng a nd criteria a re s p e ci fie d i n I S O 4 0 4.

10 Marking
The manufacturer shall mark the products or the bundles or boxes containing the products in a suitable

f
f
(see B.7).
way, s o that the identi fic ation o

the c as t, the s te el typ e a nd the origi n o

the del iver y i s p o s s ible

Table 1 — Combinations of usual heat-treatment conditions at delivery, product forms and
Tables 3 to 10
r

1

2

Heattreatment Sym1 condition bol
at
delivery

none
2 Untreated or
+U
3 Treated to
improve
shearabil- +S

3

e

q

u

4

i

r

e

m

e

5

n

t

s

a

s

s

p

e

c

i

f
i

6

e

d

7

x indicates applicable to
SemiFlat
ished Bars Wire
prodrod ucts
products

f
i

n

Hammer
and
drop
forgings

x

x

x

x

x

x

x

—

—

—

ity

i

n

8

9

Applicable requirements if the steel is ordered
with the designation given in
Table 3
Table 5, 6 or 7
8.1

8.2

9.1 9.2

9.3

—a
Chemical
composition
according

to Tables
3
and 4

Maximum
hardness
according to

HardenTable 8
column
values
+S a
according
As in
Table 8 column
to
column 8.1 and Table 5,
+Aa
6 or 7
8.2
Table 10
ab i l it y

4 Soft
x
x x
x
x
annealed +A
5 NormalMechan+N

—
x —
x
x
izedb
ical
proper6 Quenched
ties Table 9
Not apand
+QT
—
x —
x
x
accordplicable
tempered
ing to
7
Other treatment conditions, for example certain annealing conditions to achieve a certain
f
Others spheroidization of the carbides”, as required
for cold heading and cold extrusion, is covered in
ISO 4954.
a
Table 9 for the quenched and tempered condition and in Table 10 for
f
f
f
and order (for reference test pieces, see B.1 and B.2).
s truc tu re , m ay b e agre e d at the ti me o

enqu i r y a nd o rder. T he co nd itio n “a n ne a le d to ach ie ve a

T he me ch a n ic a l p ro p er tie s s p e c i fie d i n

the no r m a l i z e d co nd itio n s h a l l b e ach ie vab le a ter ap pro p r i ate he at tre atment, i

b

10

N o r m a l i z i n g m ay b e rep l ace d b y no r m a l i z i ng

s o agre e d at the ti me o

enqu i r y

fo r m i ng.

© ISO 2016 – All rights reserved

ISO 683-1:2016(E)
Table 2 — Surface condition at delivery
1

1

2

3

5
6
7
8
9
x indicates, in general, applicable to
Hammer
Semiand
drop Notes
Symbol finished
Flat
forgings
products Bars Wire rod products
(see Note 1
(as blooms,
to Clause 1)
billets)

Surface condition
at delivery

Unless
2 otherwise
agreed
3
Particular
4 conditions
supplied

by
5
agreement
6

4

or
as hot worked None
+HW
HW + pickled +PI
HW + blast
+BC
cleaned
HW + rough +RM b
machined
Others
—

xa

x

x

x

x

x

x

x
x

x
x

x
x

x
x

—
—

x
x

x
x

—
x

x
x

—

—c

a The term “hot worked” also includes the continuously cast condition (+CC) in the case o f semi-finished products.
b Until the term “rough machined” is defined by, for example machining allowances, the details are to be agreed at the
time o f enquiry and order.
c In addition, it may be agreed that the products be oiled or, where appropriate, limed or phosphated.

Table 3 — Steel grades and chemical composition (applicable to cast analysis) a, b
Steel
name

C25
C30
C35
C40
C45
C50
C55
C60

Mass fractionc

C

Si

Mn

0,22 to 0,29 0,10 to 0,40 0,40 to 0,70
to

0,27 to 0,34 0,10 to 0,40 0,50
0,80
to
0,32 to 0,39 0,10 to 0,40 0,50
0,80
to
0,37 to 0,44 0,10 to 0,40 0,50
0,80
to
0,42 to 0,50 0,10 to 0,40 0,50
0,80
0,47 to 0,55 0,10 to 0,40 0,60 to 0,90
0,52 to 0,60 0,10 to 0,40 0,60 to 0,90
0,57 to 0,65 0,10 to 0,40 0,60 to 0,90

%

S

Cr

Mo

Ni

Cu Cr+Mo+Ni

0,045
0,045

0,045
0,045

0,40
0,40

0,10
0,10

0,40
0,40

0,30
0,30

0,63
0,63

0,045

0,045

0,40

0,10

0,40

0,30

0,63

0,045

0,045

0,40

0,10

0,40

0,30

0,63

0,045
0,045
0,045
0,045

0,045
0,045
0,045
0,045

0,40

0,10

0,40

0,30

0,63

0,40
0,40
0,40

0,10
0,10
0,10

0,40
0,40
0,40

0,30
0,30
0,30

0,63
0,63
0,63

P

Quality steels

NOTE Elements not quoted shall not be intentionally added to the steel without the agreement o f the purchaser, other than
for the purpose o f finishing the heat. All reasonable precautions should be taken to prevent the addition, from scrap or other
material used in manu facture, o f such elements which a ffect the hardenability, mechanical properties and applicability.
a In the case o f grades with specified hardenability requirements (see Tables 5 to 7), except for phosphorus and sulfur,
insignificant deviations from the limits for cast analysis are permissible; these deviations shall, however, not exceed in the
case o f carbon ±0,01 % and, in all other cases, the values according to Table 4.
b Steels with improved machinability either by higher sul fur levels up to about 0,10 % S (including controlled sulphide
morphology) or lead additions may be available on request. In the first case, the upper limit for the manganese content may
be increased by 0,15 %.
c Maximum values unless otherwise indicated.
d Steels may be supplied with a lower silicon content. In this case, alternative means o f deoxidation shall be used.

© ISO 2016 – All rights reserved

11

ISO 683-1:2016(E)

Table 3 (continued)
Steel
name

Mass fraction c

C

Si

Mn

P

%

S

Cr

Mo

Ni

Cu Cr+Mo+Ni

0,40

0,10

0,40

0,30

0,63

0,40

0,10

0,40

0,30

0,63

0,40

0,10

0,40

0,30

0,63

0,40

0,10

0,40

0,30

0,63

0,40

0,10

0,40

0,30

0,63

0,40

0,10

0,40

0,30

0,63

0,40

0,10

0,40

0,30

0,63

Special steels

C25E
C25R

0,22 to 0,29 0,10 to 0,40 0,40 to 0,70 0,025

C30E
C30R

to
0,27 to 0,34 0,10 to 0,40 0,50
0,80

0,025

C35E
C35R

to
0,32 to 0,39 0,10 to 0,40 0,50
0,80

0,025

C40E
C40R

to
0,37 to 0,44 0,10 to 0,40 0,50
0,80

0,025

C45E

C45R

to
0,42 to 0,50 0,10 to 0,40 0,50
0,80

0,025

C50E
C50R

0,47 to 0,55 0,10 to 0,40 0,60 to 0,90 0,025

C55E
C55R

0,52 to 0,60 0,10 to 0,40 0,60 to 0,90 0,025

C60E
C60R

0,57 to 0,65 0,10 to 0,40 0,60 to 0,90 0,025

23Mn6 0,19 to 0,26 0,10 to
0,40 d
28Mn6 0,25 to 0,32 0,10 to
0,40 d
36Mn6 0,33 to 0,40 0,10 to
0,40 d
42Mn6 0,39 to 0,46 0,10 to

0,40 d

1,30 to
1,65
1,30 to
1,65
1,30 to
1,65
1,30 to
1,65

0,40

0,10

0,40

0,30

0,63

0,025

0,035
0,020 to
0,040
0,035
0,020 to
0,040
0,035

0,020 to
0,040
0,035
0,020 to
0,040
0,035
0,020 to
0,040
0,035
0,020 to
0,040
0,035
0,020 to
0,040
0,035
0,020 to
0,040
0,035

0,40

0,10

0,40

0,30

0,63

0,025

0,035

0,40

0,10

0,40

0,30

0,63

0,025

0,035

0,40

0,10

0,40

0,30

0,63

0,025

0,035

0,40

0,10

0,40

0,30

0,63

NOTE Elements not quoted shall not be intentionally added to the steel without the agreement o f the purchaser, other than
for the purpose o f finishing the heat. All reasonable precautions should be taken to prevent the addition, from scrap or other
material used in manu facture, o f such elements which a ffect the hardenability, mechanical properties and applicability.
a In the case o f grades with specified hardenability requirements (see Tables 5 to 7), except for phosphorus and sulfur,
insignificant deviations from the limits for cast analysis are permissible; these deviations shall, however, not exceed in the
case o f carbon ±0,01 % and, in all other cases, the values according to Table 4.
b Steels with improved machinability either by higher sul fur levels up to about 0,10 % S (including controlled sulphide
morphology) or lead additions may be available on request. In the first case, the upper limit for the manganese content may
be increased by 0,15 %.
c Maximum values unless otherwise indicated.
d Steels may be supplied with a lower silicon content. In this case, alternative means o f deoxidation shall be used.

12

© ISO 2016 – All rights reserved

ISO 683-1:2016(E)
Table 4 — Permissible deviations between the product analysis and the limiting values given

in Table 3 for the cast analysis
Permissible maximum
content according to
cast analysis

Element

Permissible deviation a

mass fraction

mass fraction

%

%

0, 30 < C ≤ 0, 55
0, 5 5 < C ≤ 0,65

Si
Mn
P
S
Cr
Cu
Mo
Ni

a

≤ 0 ,4 0
≤1 ,0 0
1,00 < Mn ≤ 1, 80
≤ 0 , 0 45
≤ 0 , 0 45
≤ 0 ,4 0
≤0, 30
≤ 0 ,10
≤ 0 ,4 0

± me a n s th at i n o ne c a s t, the de vi atio n m ay o cc u r o ve r the up p e r va lue o r u nder the lo wer va lue o f

the s p e c i fie d ra n ge i n

T

a

b

l

e

5

Steel

name

C35E
C35R
C40E
C40R
C45E
C45R
C50E
C50R
C55E
C55R
C60E
C60R

±0,02
±0,03
±0,04
±0,03
±0,04
±0,06
+0,005
±0,005
+0,05
+0,05
+0,03
+0,03

≤0, 30

C

—

H

a

r

d

n

e

s

s

l

i

Table 3, but not both at the same time.

m

i

t

s

f

o

r

s

t

e

e

l

g

r

a

d

e

see 7.1.4)

s

w

i

t

h

s

p

e

c

i

f
i

e

d

(
n

o

r

m

a

l

)

h

a

r

d

e

n

a

b

i

l

i

t

y

(
+

H

g

r

a

d

e

s

;

Limits Hardness HRC at a distance, in millimetres, from quenched end of test
piece of
Symbol
of
range 1 2 3 4 5 6 7 8 9 10 11 13 15 20 25 30

+H
+H
+H
+H
+H
+H

23Mn6

+H

28Mn6

+H

36Mn6

+H

42Mn6

+H

max.
min.
max.
min.
max.
min.
max.

min.
max.
min.
max.
min.

max.
min.
max.
min.
max.
min.
max.
min.

© ISO 2016 – All rights reserved

58
48
60
51
62
55
63
56
65
58
67
60
1,5

51
42
54
45
59
51
62
55

57
40
60
46
61
51
62
53
64
55
66
57
3
48
38
53
42
58
48
61
53

55
33
59
35
61
37
61
44
63
47
65
50
5
44
28
50
36
57
42
60
49

53
24
57
27
60
30
60

34
62
37
63
39
7
37
22
48
27
54
35
59
39

49
22
53
25
57
28
58
31
60
33
62
35
9
33
—

44
21
49
27
57
33

41
20
47
24
51
27
55
30
57
32
59
33
11
30
—
41
—
45
23
54
29

34

—
39
23
44
26
50
30
52
31
54
32
13
28
—
38
—
41
20
50
27

31
—
34
22
37
25
43
29
45

30
47
31
15
26
—
35
—
38
—
45
26

28
—
31
21
34
24
36
28
37
29
39
30
20
25
—
31
—

35
—
37
23

27
—
30
20
33
23
35
27
36
28
37
29
25
23
—
29
—
33
—
34
22

26
—
29

—
32
22
34
26
35
27
36
28
30
—
—
27
—
31
—
32
20

25
—
28
—
31
21
33
25
34
26
35

27
35
—
—
26
—
30
—
31
—

24
—
27
—
30
20
32
24
33
25
34
26
40
—
—
25
—
30
—

30
—

23
—
26
—
29
31
23
32
24
33
25
45
—
—
25
—
30
—
29
—

20
—
25
—
28
29

20
30
22
31
23
50
—
—
24
—
30
—
28
—

—
—
24
—
27
28
29
20
30
21
—
—
—
—
—

—
—
—
—

13

ISO 683-1:2016(E)
Table 6 — Values for the C-scale Rockwell hardness limits for special steels with narrowed
hardenability scatterbands (+HH and +HL grades)

+HH4
+HH14
+HL4
+HL14
+HH4
+HH14
+HL4
+HL14
+HH4
+HH14
+HL4
+HL14
+HH5
+HH15
+HL5
+HL15
+HH5
+HH15

+HL5
+HL15
+HH5
+HH15
+HL5
+HL15

C35E
C35R
C40E
C40R
C45E
C45R
C50E
C50R
C55E
C55R
C60E
C60R
a

+H H

me a n s

Values of hardness HRC at a distance, in millimetres, from quenched end of test piece of
1
4
5

Symbol a

Steel name

n a r ro we d

—
51 to 58
—
48 to 55
—
54 to 60
—
51 to 57
—
57 to 62
—
55 to 60
—
58 to 63
—
56 to 61
—
60 to 65
—
58 to 63
—
62 to 67
—
60 to 65

h a rden ab i l i ty s c atte rb a nd

34 to 53
34 to 53
24 to 43
24 to 43
38 to 57
38 to 57
27 to 46
27 to 46
41 to 60
41 to 60
30 to 49
30 to 49
—
—
—
—
—
—
—
—
—
—
—
—

on

up p er

l i m i t va lue s ,

—
—
—
—
—
—
—
—
—
—
—
—
40 to 58
40 to 58
31 to 49
31 to 49
42 to 60
42 to 60
33 to 51
33 to 51
44 to 62
44 to 62
35 to 53
35 to 53

+H L

me a n s

n a r ro we d

h a rden ab i l i t y s c atterb a nd o n lo wer l i m i t va lue s . E xa mp le : C 45 E +H H 4 me a n s h a rd ne s s with n a r ro we d
h a rden ab i l i t y s c atterb a nd o n up p e r l i m it va lue s

quenched test piece.

fro m

41 to 6 0 a re g i ve n 4 m m

fro m

the end o f the

Table 7 — Hardness limits for the C-scale Rockwell hardness for steels with a manganese range
of 1,30 to 1,65 % and with narrowed hardenability scatterbands (+HH and +HL grades)
Hardness HRC at a distance, in millimetres, from quenched end of test piece of
Steel Symbol Limits
of
name
range 1,5 3 5 7 9 11 13 15 20 25 30 35 40 45 50

23Mn6

28Mn6

14

+HH
+HL
+HH
+HL

max.
min.
max.
min.
max.
min.
max.
min.

51
45
48
42
54
48
51
45

48
41
45
38
53

46
49
42

44
33
39
28
50
41
45
36

37
27
32
22
48
34
41
27

33
23
28
—
44
30
35
21

30
20
25
—
41
27
32
—

28
—
23
—
38
24
29
—

26
—
21
—
35
21
26
—

25
—

20
—
31
—
22
—

23
—
—
—
29
—
20
—

—
—
—
27
—
—
—

—
—
—
—
26
—

—
—

—
—
—
—
25
—
—
—

—
—
—
—
25
—
—
—

—
—
—
—
24
—
—
—

© ISO 2016 – All rights reserved

ISO 683-1:2016(E)
Table 7 (continued)
Hardness HRC at a distance, in millimetres, from quenched end of test piece of
Steel Symbol Limits
of
name
range 1,5 3 5 7 9 11 13 15 20 25 30 35 40 45 50

36Mn6

42Mn6

max.
min.
max.
min.
max.
min.
max.
min.

+HH
+HL
+HH
+HL

59

54
56
51
62
57
60
55

58
51
55
48
61
56
58
53

57
47
52
42
60
53
56
49

54
41
48
35

59
46
52
39

49
34
42
27
57
41
49
33

45
30
38
23
54
37
46
29

41
27
34
20
50
35
42

27

38
24
31
—
45
32
39
26

35
21
28
—
37
28
32
23

33
—
26
—
34
26
30
22

31

—
24
—
32
24
28
20

30
—
23
—
31
23
27
—

30
—
23
—
30
22
26
—

30
—
23
—

29
21
25
—

30
—
23
—
28
20
24
—

Table 8 — Maximum hardness for products delivered in the conditions ‘treated to improve
shearability’ (+S) or “soft annealed” (+A)
HBW max. in conditionb
+S
+A
Quality steels

Steel name a

C25
C30
C35
C40
C45
C50
C55

C60

T he va lue s ap p l y a l s o

covered in Tables 5 to 7

b
c
d

—
—
—
—
—
—
—
—

—c
—c
—c
—c
255 c
255
255
255 d
—c
255
255

255

—
—
—
—
207
217
229
241
—
223
229
229

Special steels

C25E, C25R
C30E, C30R
C35E, C35R
C40E, C40R
C45E, C45R
C50E, C50R
C55E, C55R
C60E, C60R
23Mn6
28Mn6
36Mn6
42Mn6

a

—c
—c
—c
—c
255 c
255
255
255 d

fo r

the va r io u s h a rde n ab i l it y (+H - , +H H - a nd +H L -) g rade s

; s e e , ho we ve r,

fo o tno te

d.

T he va lue s a re no t ap p l ic ab le to co nti nuo u s l y c a s t a nd no t

See 7.3.3.

fu r the r de fo r me d

s l ab s .

D e p e nd i n g o n che m ic a l co mp o s itio n a nd o n d i me n s io n s , p a r tic u l a rl y i n the c a s e

o f the +H H g rade s , s o ft a n ne a l i ng m ay b e ne ce s s a r y.

© ISO 2016 – All rights reserved

15

Mechanical properties for ruling sections (see Annex A) with a diameter, d
16 mm < d
40 mm < d
8 mm < t
20 mm < t

, or

Steel
name

ReH

min.

C25

370

C30

400

C35

430

C40

460

C45

490

C50

520

C55

550

C60

580

a

Rm

d ≤ 16 m m

t ≤ 8 mm
A

≤ 40 mm

Zb

≤ 2 0 mm

KV2

ReH

Rm

min. min. min. min.
J
MPac

MPac

%

550 to
700
600 to
750
630 to
780
650 to

800
700 to
850
750 to
900
800 to
950
850 to
1 000

%

19

—

—

320

18

—

—

350

17

40

—

380

16

35

—

400

14

35

—

430

13

—

—

460

12

30

—

490

11

25

—

520

500 to
650
550 to
700
600 to
750
630 to
780
650 to
800
700 to
850
750 to
900

800 to
950

A

Zb

%

%

KV2

ReH

Rm

min. min. min. min.
J
MPac

t, of
100 mm < d ≤ 1 6 0 m m
60 mm < t ≤ 10 0 m m
Zb
A
Rm

fl at p ro duc ts with th ickne s s ,

≤ 10 0 m m
≤ 60 mm

A

Zb

KV2

ReH

%

%

min. min. min.
J
%

%

—

—

—

—

—

—

—

—

21 e

—

—

—

—

—

—

—

20

50

—

—

—

—

—

—

19

45

—

—

—

—

—

—

17

45

—

—

—

—

—

—

16

—

—

—

—

—

—

—

15

40

—

—

—

—

—

—

14

35

—

—

—

—

—

—

Quality steels

21

—

20

—

19

45

18

40

16

40

15

—

14

35

13

30

—

—

—
to
— 300 e 500
650 e
to
— 320 550
700
to
— 350 600
750
to
— 370 630
780
to
— 400 650
800
to
— 420 700
850
to
— 450 750
900

,

© ISO 2016 – All rights reserved

, co lu m n 7a, l i ne T4) ;

S

0

; see

Z is the reduction in cross-section on fracture. KV2 : i mp ac t s tren g th o f lo n g itud i n a l C h a r p y V- no tch te s t p ie ce s wi th s tr i ke r rad iu s 2 m m; average o f 3

i nd i vidu a l va lue s , no i nd i vidu a l va lue s h a l l b e lo wer th a n 70 % o f the m i n i mu m average va lue .
T he s e va lue s a re o p tio n a l a nd c a n b e ag re e d at the ti me o f e nqu i r y a nd o rder.

1 MPa = 1 N/mm 2 .

I f te s ti n g o f C h a r p y- U- no tch i mp ac t te s t p ie ce s i s re qu i re d , the m i n i mu m i mp ac t s tren g th va lue s h a l l b e ag re e d .
Up to 6 3 m m d i a me te r

KV2

min. min. min. min.
J
MPac

ReH : Up p e r yie ld s tre s s o r, i f no yield p heno me no n o cc u r s , the 0 , 2 % p ro o f s tre s s Rp0,2 . R m : te n s i le s tre n g th; A is the percentage elongation after fracture ( L 0 = 5 65

Table 12
b
c
d
e

fo r

fo r

ro u nd p ro duc ts a nd 3 5 m m th ickne s s

fo r

fl at p ro duc ts .

ISO 683-1:2016(E)

16

Table 9 — Mechanical properties in the quenched and tempered condition a

© ISO 2016 – All rights reserved

Table 9 (continued)

Mechanical properties for ruling sections (see Annex A) with a diameter, d
16 mm < d
40 mm < d

8 mm < t
20 mm < t

, or

Steel
name

ReH

min.

C25E C25R 370
C30E C30R 400
C35E C35R 430
C40E C40R 460
C45E C45R 490
C50E C50R 520
C55E C55R 550
C60E C60R 580
23Mn6
a

550

Rm

d ≤ 16 m m
t ≤ 8 mm
A

≤ 40 mm

Zb

≤ 2 0 mm

KV2

ReH

Rm

min. min. min. min.
J
MPac

MPac

%

550 to
700
600 to
750
630 to
780
650 to
800
700 to

850
750 to
900
800 to
950
850 to
1 000
700 to
850

%

19

—

35 d 320

18

—

30 d 350

17

40

25 d 380

16

35

20 d 400

14

35

15 d 430

13

30

—

460

12

30

—

490

11

25

—

520

15

—

—

440

Zb

A

ReH

Rm

min. min. min. min.
J
MPac
%

500 to
650
550 to

700
600 to
750
630 to
780
650 to
800
700 to
850
750 to
900
800 to
950
650 to
800

KV2

%

t, of
100 mm < d ≤ 1 6 0 m m
60 mm < t ≤ 10 0 m m
A
Zb
Rm

fl at p ro duc ts with th ickne s s ,

≤ 10 0 m m

≤ 60 mm

A

Zb

KV2

ReH

%

%

min. min. min.
J
%

%

—

—

—

—

—

—

—

21 e

— 30 de —

—

—

—

—

20

50

25 d

—

—

—

—

—

19

45

20 d

—

—

—

—

—

17

45

15 d

—

—

—

—

—

16

40

—

—

—

—

—

—

15

40

—

—

—

—

—

—

14

35

—

—

—

—

—

—

18

—

30 d

—

—

—

—

—

Special steels

21

—

35 d

20

—

30 d

19

45

25 d

18

40

20 d

16

40

15 d

15

35

—

14

35

—

13

30

—

18

—

30 d

—

—
to
300 e 500
650 e
to
320 550
700
to
350 600
750
to
370 630
780
to
400 650
800
to
420 700
850
to
450 750
900
to
400 600

750

—

,

0

; see

Z is the reduction in cross-section on fracture. KV2 : i mp ac t s tren g th o f lo n g itud i n a l C h a r p y V- no tch te s t p ie ce s wi th s tr i ke r rad iu s 2 m m; average o f 3

i nd i vidu a l va lue s , no i nd i vidu a l va lue s h a l l b e lo wer th a n 70 % o f the m i n i mu m average va lue .
T he s e va lue s a re o p tio n a l a nd c a n b e ag re e d at the ti me o f enqu i r y a nd o rder.

1 MPa = 1 N/mm 2 .

I f te s ti n g o f C h a r p y- U- no tch i mp ac t te s t p ie ce s i s re qu i re d , the m i n i mu m i mp ac t s tren g th va lue s h a l l b e ag re e d .
Up to 6 3 m m d i a me te r

S

fo r

ro u nd p ro duc ts a nd 3 5 m m th ickne s s

fo r

fl at p ro duc ts .

17

ISO 683-1:2016(E)

, co lu m n 7a, l i ne T4) ;

KV2

min. min. min. min.
J
MPac

ReH : Up p e r yie ld s tre s s o r, i f no yield p heno me no n o cc u r s , the 0 , 2 % p ro o f s tre s s Rp0,2 . R m : te n s i le s tre n g th; A is the percentage elongation after fracture ( L 0 = 5 65

Table 12
b
c
d
e

fo r

Mechanical properties for ruling sections (see Annex A) with a diameter, d
16 mm < d
40 mm < d
8 mm < t
20 mm < t

, or

Steel
name

ReH

Rm

d ≤ 16 m m
t ≤ 8 mm
A

36Mn6
42Mn6
a

Zb

KV2

ReH

Rm

A

Zb

%

%

min. min. min. min.
min. min.
MPac
J
MPac
to 13 40 25 d 490 700 to 15 45
590 800
950
850
850
to
to 14 —
640 1 000 12 — 20 d 540 750
900
to
800 to 14 —
690 900
1 050 12 — 25 d 590 950

min.

%

28Mn6

≤ 40 mm

≤ 2 0 mm

%

KV2

ReH

Rm

t, of
100 mm < d ≤ 1 6 0 m m
60 mm < t ≤ 10 0 m m
A
Zb
Rm

fl at p ro duc ts with th ickne s s ,

≤ 10 0 m m
≤ 60 mm

A

Zb

%

%

min. min.

min. min.
J
MPac
to 16 50
30 d 440 650
800
to 15 —
25 d 460 700
850
to 15 —
30 d 480 750
900

KV2

ReH

%

20 d
30 d
S

0

; see

Z is the reduction in cross-section on fracture. KV2 : i mp ac t s tren g th o f lo n g itud i n a l C h a r p y V- no tch te s t p ie ce s wi th s tr i ke r rad iu s 2 m m; average o f 3

i nd i vidu a l va lue s , no i nd i vidu a l va lue s h a l l b e lo wer th a n 70 % o f the m i n i mu m average va lue .

T he s e va lue s a re o p tio n a l a nd c a n b e ag re e d at the ti me o f enqu i r y a nd o rder.

1 MPa = 1 N/mm 2 .

I f te s ti n g o f C h a r p y- U- no tch i mp ac t te s t p ie ce s i s re qu i re d , the m i n i mu m i mp ac t s tren g th va lue s h a l l b e ag re e d .
Up to 6 3 m m d i a me te r

min.
J
—

%

,

, co lu m n 7a, l i ne T4) ;

KV2

min. min.
min. min.
J
MPac
30 d —
—
— —
to 16 —
25 d 410 650
800
to 16 —

30 d 460 700
850

ReH : Up p e r yie ld s tre s s o r, i f no yield p heno me no n o cc u r s , the 0 , 2 % p ro o f s tre s s Rp0,2 . R m : te n s i le s tre n g th; A is the percentage elongation after fracture ( L 0 = 5 65

Table 12
b
c
d
e

fo r

fo r

ro u nd p ro duc ts a nd 3 5 m m th ickne s s

fo r

fl at p ro duc ts .

ISO 683-1:2016(E)

18

Table 9 (continued)

© ISO 2016 – All rights reserved

ISO 683-1:2016(E)

Table 10 — Mechanical properties a for normalized condition

Steel name b

C25
C30
C35
C40
C45
C50
C55
C60

d ≤ 16 m m
t ≤ 16 m m
Rm

260
280
300
320
340
355
370
380

C25E C25R
C30E C30R

C35E C35R
C40E C40R
C45E C45R
C50E C50R
C55E C55R
C60E C60R
23Mn6
28Mn6
36Mn6
42Mn6

a

ReH

min.
MPa

ReH :

260
280
300
320
340
355
370
380
—
345

—
—

min.
MPa

A

min.
%

ReH

min.
MPa

Quality steels

470
510
550
580
620
650
680
710

22
20
18

16
14
12
11
10

230
250
270
290
305
320
330
340

Special steels

470
510
550
580
620
650
680
710
—
630
—
—

22
20
18
16
14
12
11
10
—
17
—
—

230
250
270
290
305
320
330
340
—
310
—
—

≤ 10 0 m m

≤ 2 5 0 mm

≤ 10 0 m m

≤ 2 5 0 mm

Rm

A

min.
MPa

min.

440
480
520
550
580
610
640
670
440
480
520
550
580
610
640
670
—

600
—
—

T he va lue s ap p l y a l s o

fo r

0

= 5 , 65

S

0

; see

ReH

Rm

A

min.
MPa

min.
MPa

min.

23
21
19
17
16
14
12
11

—
230
245
260
275
290
300
310

—
460
500
530
560
590
620
650

—

21
19
17
16
14
12
11

23
21
19
17
16
14
12
11
—
18
—
—

—
230
245
260
275
290
300
310
—

290
—
—

—
460
500
530
560
590
620
650
—
590
—
—

—
21
19
17
16
14
12
11
—
18
—
—

%

up p er yie ld s tre s s o r, i f no yie ld p heno meno n o cc u rs , the 0 , 2 % p ro o f s tre s s

percentage elongation after fracture ( L

b

For products with a diameter, d, or a thickness, t, of
16 mm < d
100 mm < d
16 mm < t
100 mm < t

Table 12, column 7a, line T4).
Tables 5 to 7.

Rp0,2 ; Rm :

ten s i le s tren g th;

%

A

is the

the va r io u s h a rden ab i l i ty g rade s co ve re d i n

© ISO 2016 – All rights reserved

Tiêu chuẩn iso 00683 1 2016

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