Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

BRITISH STANDARD

BS EN
10297-2:2005
Incorporating
corrigendum no. 1

Seamless circular
steel tubes for
mechanical and
general engineering
purposes —
Technical delivery
conditions —
Part 2: Stainless steel

The European Standard EN 10297-2:2005 has the status of a
British Standard

ICS 77.140.75

12&23<,1*:,7+287%6,3(50,66,21(;&(37$63(50,77('%<&23<5,*+7/$:


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

BS EN 10297-2:2005

National foreword

This British Standard was published by BSI. It is the UK implementation of
EN 10297-2:2005, incorporating corrigendum February 2007.
The UK participation in its preparation was entrusted to Technical Committee
ISE/8, Steel pipes.
A list of organizations represented on ISE/8 can be obtained on request to its
secretary.
This publication does not purport to include all the necessary provisions of a
contract. Users are responsible for its correct application.
Compliance with a British Standard cannot confer immunity from
legal obligations.

Amendments issued since publication

This British Standard was
published under the authority
of the Standards Policy and
Strategy Committee
on 30 December 2005
© BSI 2007

ISBN 0 580 46932 8

Amd. No.

Date

17060

30 April 2007 English title changed to: “Seamless circular
steel tubes ...”

Table 1, footnote b: formula replaced with:
“Nb (% by mass) = Zr (% by mass) = 7/4 Ti
(% by mass)”

Corrigendum No. 1

Comments


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EUROPEAN STANDARD

EN 10297-2

NORME EUROPÉENNE
EUROPÄISCHE NORM

December 2005
Incorporating corrigendum February 2007

ICS 77.140.75

English Version

Seamless circular steel tubes for mechanical and general engineering
purposes - Technical delivery conditions - Part 2: Stainless steel
Tubes sans soudure en acier pour utilisation en mécanique
générale et en construction mécanique - Conditions
techniques de livraison - Partie 2: Tubes en acier

inoxydable

Nahtlose kreisförmige Stahlrohre für den Maschinenbau
und allgemeine technische Anwendungen - Technische
Lieferbedingungen - Teil 2: Nichtrostender Stähle

This European Standard was approved by CEN on 25 March 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36

© 2005 CEN

All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.

B-1050 Brussels


Ref. No. EN 10297-2:2005: E


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)

Contents

Page

Foreword ..........................................................................................................................................................3
Introduction......................................................................................................................................................4
1

Scope ...................................................................................................................................................5

2

Normative references .........................................................................................................................5

3

Terms and definitions.........................................................................................................................6

4

Symbols...............................................................................................................................................6

5


Classification and designation ..........................................................................................................6

6

Information to be supplied by the purchaser....................................................................................6

7

Manufacturing process.......................................................................................................................7

8

Requirements ......................................................................................................................................8

9

Inspection and testing ......................................................................................................................20

10

Sampling............................................................................................................................................22

11

Test methods.....................................................................................................................................23

12

Marking ..............................................................................................................................................25


13

Handling and packaging...................................................................................................................25

Annex A (normative) Process route and surface conditions ....................................................................26
Annex B (informative) Guideline data on heat treatment during fabrication and hot working as part of
further processing ............................................................................................................................27
Annex C (normative) Formulae for calculation of nominal sectional properties .....................................32
Bibliography...................................................................................................................................................33

2


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)

Foreword
This document (EN 10297-2:2005) has been prepared by Technical Committee ECISS/TC 29 “Steel tubes and
fittings for steel tubes”, the secretariat of which is held by UNI.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by June 2006, and conflicting national standards shall be withdrawn at the latest by
June 2006.
Another part of EN 10297 is:
Part 1: Non-alloy and alloy steel tubes
Another European Standard series, covering seamless steel tubes for mechanical and general engineering
purposes, currently being prepared is:
EN 10296-2 Welded circular steel tubes for mechanical and general engineering purposes — Technical delivery
conditions – Part 2: Stainless steel.

Other series of European Standards being prepared in this area are prEN 10294 - hollow bars for machining and
EN 10305 - steel tubes for precision applications.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

3


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)

Introduction
The European Committee for Standardisation (CEN) draws attention to the fact that it is claimed that compliance
with this document may involve the use of patents applied to steel grades 1.4362, 1.4410, 1.4477 and 1.4854, the
compositions of which are given in Tables 3 and 4.
CEN takes no position concerning the evidence, validity and scope of these patent rights.
The holders of these patent rights have assured CEN that they are willing to negotiate licences, under reasonable
and non-discriminatory terms and conditions, with applicants throughout the world. In this respect, the statements
of the holders of these patent rights are registered with CEN. Information may be obtained from:
Grades 1.4362, 1.4410 and 1.4477
Sandvik AB
SE-811 81 SANDVIKEN
Sweden
Grade 1.4854
Outokumpu OYJ
Intelectual Property Management
P.O Box 27

FI – 02201 ESPOO
Finland
Attention is drawn to the possibility that some of the elements within this document may be the subject of patent
rights other than those indicated above. CEN shall not be responsible for identifying any or all such patent rights.

4


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)

1

Scope

This European Standard specifies the technical delivery conditions for seamless tubes, of circular cross section,
made from stainless steels, for mechanical and general engineering purposes.

2

Normative references

The following referenced documents are indispensable for the application of this document. For dated references,
only the edition cited applies. For undated references, the latest edition of the referenced document (including any
amendments) applies.
EN 10002-1, Metallic materials – Tensile testing – Part 1: Method of test (at ambient temperature)
EN 10020:2000, Definition and classification of grades of steel
EN 10021:1993, General technical delivery requirements for steel and iron products
EN 10027-1, Designation systems for steel – Part 1: Steel names, principal symbols

EN 10027-2, Designation systems for steel – Part 2: Numerical system
EN 10052:1993, Vocabulary of heat treatment terms for ferrous products
EN 10088-1, Stainless steels – Part 1: List of stainless steels
EN 10168, Steel products – Inspection documents – List of information and description
EN 10204, Metallic products – Types of inspection documents
EN 10246-2, Non-destructive testing of steel tubes – Part 2: Automatic eddy current testing of seamless and
welded (except submerged arc-welded) austenitic and austenitic-ferritic steel tubes for verification of hydraulic leaktightness
EN 10246-3, Non-destructive testing of steel tubes – Part 3: Automatic eddy current testing of seamless and
welded (except submerged arc-welded) steel tubes for the detection of imperfections
EN 10246-5, Non-destructive testing of steel tubes – Part 5: Automatic full peripheral magnetic transducer/flux
leakage testing of seamless and welded (except submerged arc-welded) ferromagnetic steel tubes for the detection
of longitudinal imperfections
EN 10246-7, Non-destructive testing of steel tubes – Part 7: Automatic full peripheral ultrasonic testing of seamless
and welded (except submerged arc-welded) steel tubes for the detection of longitudinal imperfections
EN 10256, Non-destructive testing of steel tubes – Qualification and competence of level 1 and 2 non-destructive
testing personnel
EN 10266:2003, Steel tubes, fittings and structural hollow sections - Symbols and definitions of terms for use in
product standards
CR 10260:1998, Designation system for steel – Additional symbols
EN ISO 377, Steel and steel products – Location and preparation of samples and test pieces for mechanical testing
(ISO 377:1997)
EN ISO 1127, Stainless steel tubes – Dimensions, tolerances and conventional masses per unit length
(ISO 1127:1992)

5


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)


EN ISO 2566-2, Steel – Conversion of elongation values – Part 2: Austenitic steels (ISO 2566-2:1984).
EN ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels – Part 2: Ferritic,
austenitic and ferritic-austenitic (duplex) stainless steels – Corrosion test in media containing sulfuric acid (ISO
3651-2:1998)

3

Terms and definitions

For the purposes of this European Standard, the terms and definitions given in EN 10020:2000, EN 10021:1993,
EN 10052:1993 and EN 10266:2003 together with the following apply.
employer
organisation for which the person works on a regular basis.
NOTE
The employer may be either the tube manufacturer or a third party organisation providing non-destructive testing
(NDT) services.

4

Symbols

For the purposes of this European Standard, the symbols given in EN 10266:2003 and CR 10260:1998 apply.
Not applicable.

5

Classification and designation

5.1 Classification

In accordance with the classification system in EN 10020, the steel grades listed in Tables 1, 2, 3 and 4 are
stainless steels.

5.2 Designation
For tubes covered by this document the steel designation consists of:
 number of this document (EN 10297-2);
plus either:
 steel name in accordance with EN 10027-1 and CR 10260;
 or steel number allocated in accordance with EN 10027-2.

6

Information to be supplied by the purchaser

6.1 Mandatory information
The following information shall be supplied by the purchaser at the time of enquiry and order:
a) quantity (mass or total length or number);
b)

term "tube";

c)

dimensions (outside diameter D, wall thickness T) (see 8.7.1);

6


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI


EN 10297-2:2005 (E)

d)

steel designation according to this document (see 5.2);

e)

delivery condition, where necessary (see 7.2.2).

6.2 Options
A number of options are specified in this document and these are listed below with appropriate clause references.
In the event that the purchaser does not indicate a wish to implement any of these options at the time of enquiry
and order, the tube shall be supplied in accordance with the basic specification (see 6.1).
1) process route and/or surface condition (see 7.2.1);
2) controlled sulphur content (see Tables 1, 2, and 3);
3) non-destructive testing (see 8.4.2);
4) leak tightness test (see 8.4.2);
5) straightness (see 8.5);
6) exact lengths (see 8.7.2);
7) outside diameter and thickness tolerances (see 8.7.3.1);
8) specific inspection and testing (see 9.1);
9) test report 2.2 (see 9.2.1);
10) inspection certificate, 3.2 (see 9.2.1);
11) leak tightness test method (see 11.2.1).

6.3 Example of an order
Twenty five tonnes of seamless steel tubes with a specified outside diameter of 60,3 mm, a specified wall thickness
of 3,6 mm, in accordance with EN 10297-2, made from steel grade 1.4016, and with a test report 2.2 (option 9) in
accordance with EN 10204.

25 t - tube - 60,3 x 3,6 - EN 10297-2 – 1.4016 - Option 9

7

Manufacturing process

7.1 Steelmaking process
The steelmaking process is at the discretion of the manufacturer.

7.2 Tube manufacturing and delivery conditions
7.2.1 Tubes shall be manufactured by a seamless process, and may be hot finished or cold finished. The terms
“hot finished “ and “ cold finished “ apply to the condition of the tube before it is heat treated in accordance with
7.2.2. Acceptable process routes and surface conditions are given in Table A.1. The choice of process route and
surface condition is left to the discretion of the manufacturer, unless Option 1 is specified.
Option 1:

The process route and/or surface condition is specified by the purchaser from those in Table A.1.

7.2.2 Tubes shall be supplied in the delivery conditions given in Tables 6, 7, 8 or 9, as applicable. Possible
delivery conditions are annealed (+A) for ferritic steels, quenched and tempered (+QT) for martensitic steels and

7


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)

solution annealed (+AT) for austenitic and austenitic-ferritic steels. (See Annex B for guidance on heat treatment
following fabrication and further processing.)

For steel grade 1.4006, the purchaser shall specify the delivery condition, either QT 550 or QT 650. The process
route and surface condition for this grade shall be at the discretion of the manufacturer unless Option 1 (see 7.2.1)
is specified.
Solution heat treatment shall consist of heating the tubes uniformly to the appropriate required temperature and
then cooling rapidly. The solution treatment may be omitted if the conditions during hot working and subsequent
cooling are such that the mechanical properties of the product can be met and the requirements for resistance to
intergranular corrosion as defined in EN ISO 3651-2 can be obtained. See Annex B for guidance on heat treatment
during fabrication and hot working as part of further processing.
7.2.3
All NDT activities shall be carried out by qualified and competent level 1, 2 and/or 3 personnel authorised
to operate by the employer.
The qualification shall be in accordance with EN 10256 or, at least, an equivalent to it.
It is recommended that the level 3 personnel be certified in accordance with EN 473 or, at least, an equivalent to it.
The operating authorisation issued by the employer shall be in accordance with a written procedure.
NDT operations shall be authorised by a level 3 NDT individual approved by the employer.
NOTE

8

The definition of level 1,2 and 3 can be found in the appropriate standards, e.g. EN 473 and EN 10256.

Requirements

8.1 General
Tubes, when supplied in a delivery condition in accordance with 7.2.2, using a process route and to a surface
condition given in Table A.1 and inspected in accordance with Clause 9, shall comply with the requirements of this
document.
In addition, the general technical delivery requirements specified in EN 10021 shall apply.
Grades additional to those in Tables 1, 2, 3 and 4 may be supplied by agreement; the chemical analysis and the
mechanical properties for these shall be agreed at the time of enquiry and order.


8.2 Chemical composition
The cast analysis reported by the steel producer shall apply and shall conform to the requirements in Tables 1, 2, 3
or 4, as appropriate.
Elements not included in Tables 1, 2, 3 and 4 shall not be intentionally added to the steel without the agreement of
the purchaser, except for elements which may be added for finishing the cast. All appropriate measures shall be
taken to prevent the addition of undesirable elements from scrap or other materials used in the steelmaking
process.
The permissible deviations of a product analysis from the specified limits of the cast analysis are given in Table 5.
NOTE
When subsequently welding tubes produced according to this document, account should be taken of the fact that
the behaviour of the steel during and after welding is dependent not only on the steel but also on the conditions of preparing for
and carrying out the welding. Some of the steels specified in this document cannot be welded unless specialised techniques are
employed by specialist welders.

8


1.4510

1.4006

X3CrTi17

X12Cr13

b

0,08


min.

C

0,15

0,05

0,08

0,08

0,030

max.

1,00

1,00

1,00

1,00

1,00

max.

Si


1,50

1,00

1,00

1,00

1,00

max.

Mn

P
max.

S

16,0
16,0

0,015 a
a

0,040

Cr

13,5


18,0

18,0

14,0

12,5

max.

0,75

max.

Ni

[4 x
(C+N) +
0,15] b

6 x (C +
N)

min.

Ti

0,80


b

0,65

max.

Al0,10

min.

Al
0,30.

max.

Others

equivalence shall be the following: Nb (% by mass) = Zr (% by mass) = 7/4 Ti (% by mass) .

Stabilisation may be applied by the use of titanium or niobium or zirconium. According to the atomic number of these elements and the content of carbon and nitrogen, the

0,015 a
11,5

12,0

0,015 a

0,015


10,5

min.

0,015

Martensitic steel

0,040

0,040

0,040

0,040

Ferritic steels

max.

a controlled sulphur content of 0,015 % to 0,030 % is specified.

1.4016

X6Cr17

Option 2

1.4002


X6CrAl13

a

1.4512

Steel
number

X2CrTi12

Steel name

Steel grade

Table 1 — Chemical composition (cast analysis) for tubes made fromferritic and martensitic corrosion resistant steels, in % by mass

9

EN 10297-2:2005 (E)

Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI


10

1.4306

1.4311


1.4301

1.4305

1.4541

1.4550

1.4335

1.4404

1.4401

X2CrNi19-11

X2CrNiN18-10

X5CrNi18-10

X8CrNiS18-9

X6CrNiTi18-10

X6CrNiNb18-10

X1CrNi25-21

X2CrNiMo17-12-2


X5CrNiMo17-12-2

0,05

0,030

0,030

0,020

0,020

0,020

1.4435

X2CrNiMo18-14-3

X2CrNiMoN17-13-5 1.4439

X1NiCrMoCu31-27- 1.4563
4

X1NiCrMoCu25-20- 1.4539
5

X1CrNiMoCuN2018-7

1.4547


0,030

1.4436

0,08

X6CrNiMoNb17-12- 1.4580
2

X3CrNiMo17-13-3

0,08

X6CrNiMoTi17-12-2 1.4571

X2CrNiMoN17-13-3 1.4429

0,020

X1CrNiMoN25-22-2 1.4466

0,07

0,030

0,020

0,08

0,08


0,10

0,07

0,030

0,030

0,030

1.4307

X2CrNi18-9

C

min. max.
Steel
number

Steel name

Steel grade

Mn

P

S


0,70

0,70

0,70

1,00

1,00

1,00

1,00

1,00

1,00

0,70

1,00

1,00

0,25

1,00

1,00


1,00

1,00

1,00

1,00

1,00

0,015

0,015

0,015

0,015

1,00 0,030

2,00 0,030

2,00 0,030

2,00 0,045

2,00 0,045

2,00 0,045


2,00 0,045

2,00 0,045

2,00 0,045

2,00 0,025

2,00 0,045

2,00 0,045

2,00 0,025

2,00 0,045

2,00 0,045

0,010

0,010

0,010

0,015

0,015

0,015


0,015

0,015

0,015

0,010

0,015

0,015

0,010

0,015

0,015

2,00 0,045 0,15 0,35

2,00 0,045

2,00 0,045

2,00 0,045

2,00 0,045

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


Si

a

a

a

a

a

a

a

a

a

a

Mo

Ni

10,5

12,0


12,0

10,0

10,5

19,5 20,5 6,0

19,0 21,0 4,0

26,0 28,0 3,0

16,5 18,5 4,0

7,0

5,0

4,0

5,0

17,5 18,5

24,0 26,0

30,0 32,0

12,5 14,5


17,0 19,0 2,50 3,00 12,5 15,0

16,5 18,5 2,50 3,00 10,5 14,0

16,5 18,5 2,50 3,00 11,0 15,0

16,5 18,5 2,00 2,50 10,5 13,5

16,5 18,5 2,00 2,50 10,5 14,0

24,0 26,0 2,00 2,50 21,0 23,0

16,5 18,5 2,00 2,50 10,0 13,0

b

b

11,5,

0,20 20,0 22,0

9,0

9,0

8,0

8,0


8,5

10,0 12,0

8,0

16,5 18,5 2,00 2,50 10,0 14,5

24,0 26,0

17,0 19,0

17,0 19,0

17,0 19,0

17,0 19,5

17,0 19,5

18,0 20,0

17,5 19,5

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

Cr

N


0,15

0,11

0,12 0,22

0,11

0,11

0,12 0,22

0,10 0,16

0,11

0,11

0,11

0,11

0,50 1,00 0,18 0,25

1,20 2,00

0,70 1,50

1,00


0,11

0,12 0,22

0,11

0,11

Nb
1,00
10 x C

0,70

5xC
Nb

Ti

Ti

1,00

10 x C

0,70
Nb

5xC

Nb

Ti

max.

Others

Ti

min. max. min. max. min.

Cu

Table 2 — Chemical composition (cast analysis) for tubes made from austenitic corrosion resistant steels, in % by mass

EN 10297-2:2005 (E)

Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI


0,70

0,50
1,00 0,020

1,00 0,030
0,015

0,010

20,0 23,0

19,0 21,0 6,0

7,0
32,0 35,0

24,0 26,0

0,50 1,50 0,15 0,25
Ti
Al
0,45

Al
0,15

8 x (C+N) 0,60

Ti

Where for special reasons, e.g. hot workability, it is necessary to minimize the delta ferrite content, or with the aim of low permeability, the maximum nickel content may be
increased by 1,00 %.

b

0,030

0,020


Option 2 a controlled sulphur content of 0,015 % to 0,030 % is specified.

1.4558

X2NiCrAlTi32-20

a

1.4529

X1NICrMoCuN2520-7

Table 2 — Chemical composition (cast analysis) for tubes made from austenitic corrosion resistant steels, in % by mass
(concluded)

11

EN 10297-2:2005 (E)

Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI


12

1.4460

1.4477

1.4462


1.4507

1.4410

1.4501

1.4424

X3CrNiMoN27-5-2

X2CrNiMoN29-7-2 a

X2CrNiMoN22-5-3

X2CrNiMoCuN25-6-3

X2CrNiMoN25-7-4 a

X2CrNiMoCuWN25-7-4

X2CrNiMoSi18-5-3

b

0,030 1,40

0,030

0,030


0,030

0,030

0,030

0,05

0,030

min.

2,00

1,00

1,00

0,70

1,00

0,50

1,00

1,00

max.


Si

P

1,20 2,00 0,035

1,00 0,035

2,00 0,035

2,00 0,035

2,00 0,035

0,80 1,50 0,030

Cr

Mo

25,0 28,0 1,30 2,00

3,0

3,0

2,7

2,5


4,0

4,5

4,0

3,5

0,015 18,0 19,0 2,50 3,00

0,015 24,0 26,0

0,015 24,0 26,0

0,015 24,0 26,0

0,015 21,0 23,0

0,015 28,0 30,0 1,50 2,60

b

0,015 22,0 24,0 0,10 0,60

max. min. max. min. max.

S

2,00 0,035 0,015


2,00 0,035

min. max. max.

Mn

Option 2 a controlled sulphur content of 0,015 % to 0,030 % is specified.

Patented steel grade.

1.4362

a

C

Steel
max.
number

X2CrNiN23-4 a

Steel name

Steel grade

4,5

6,0


6,0

5,5

4,5

5,8

4,5

3,5

min.

Ni

N

Others

5,2

8,0

8,0

7,5

6,5


7,5

6,5

5,5

0,05 0,10

0,50 1,00 0,20 0,30 W
W
0,50 1,00

0,24 0,35

1,00 2,50 0,15 0,30

0,10 0,22

0,30 0,40

0,05 0,20

0,10 0,60 0,05 0,20

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

Cu

Table 3 — Chemical composition (cast analysis) for tubes made from austenitic-ferritic corrosion resistant steels, in % by mass


EN 10297-2:2005 (E)

Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI


1.4845

1.4876

1.4854

X8CrNi25-21

X10NiCrAlTi32-21

X6NiCrSiNCe35-25 a

Patented steel grade

1.4833

X12CrNi23-13

a

1.4878

1.4835

X9CrNiSiNCe21-11-2


1.4749

X18CrN28

X8CrNiTi18-10

Steel
number

Steel name

Steel grade

0,04

0,05

0,15

min.

C

0,08

0,12

0,10


0,15

0,12

0,10

0,20

max.

1,20

1,40

min.

Si

2,00

1,00

1,50

1,00

2,50

1,00


1,00

max.

2,00

2,00

2,00

2,00

1,00

2,00

1,00

max.

Mn
max.

S

0,015

0,040

0,030


0,045

0,045

0,045

0,045

0,015

0,015

0,015

0,015

0,015

0,015

Austenitic steels

0,040

Ferritic steels

max.

P


24,0

19,0

24,0

22,0

20,0

17,0

26,0

min.

26,0

23,0

26,0

24,0

22,0

19,0

29,0


max.

Cr

34,0

30,0

19,0

12,0

10,0

9,0

min.

36,0

34,0

22,0

14,0

12,0

12,0


max.

Ni

0,12

0,12

0,15

min.

N

0,20

0,11

0,11

0,20

0,25

max.

0,15

5xC


min.

Ti

0,60

0,80

max.

Ce
0,03

Al
0,15

Ce
0,03

Ce
0,08

Al
0,60

Ce
0,08

max.


Others
min.

Table 4 — Chemical composition (cast analysis) for tubes made from ferritic and austenitic heat resisting steels, in % by mass

13

EN 10297-2:2005 (E)

Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)

Table 5 — Permissible deviations of the product analysis from the specified limits on cast analysis given in
Tables 1 to 4
Element

C
Si
Mn
P
S

Cr

Mo


Ni

Al
Cu
N
Nb
Ti
W
Ce

Limiting values for the
cast analysis in
accordance with
Tables 1, 2, 3 and 4

Permissible deviation of
the product analysis

% by mass

% by mass

≤ 0,030
> 0,030 ≤ 0,20
≤ 1,00
> 1,00 ≤ 2,50
≤ 1,00

+ 0,005


> 1,00 ≤ 2,00
≤ 0,045
≤ 0,015
> 0,015 ≤ 0,030
> 0,15 ≤ 0,35

±0,04
+ 0,005
+ 0,003

> 10,50 ≤ 15,0

± 0,15

> 15,0 ≤ 20,0

± 0,20

> 20,0 ≤ 30,0

± 0,25

≤0,60
> 0,60 < 1,75

± 0,01
+ 0,05
±0,10
± 0,03


±0,005
± 0,02

±0,03

≥ 1,75 ≤ 7,00
<1,00

± 0,05
± 0,10
± 0,03

≥ 1,0 ≤ 5,0

± 0,07

> 5,0 ≤ 10,0
> 10,0 ≤ 20,0

± 0,10
± 0,15

> 20,0 ≤ 36,0
≥ 0,10 ≤ 0,30
> 0,30 ≤ 0,60
≤ 1,00
> 1,00 ≤ 2,50

± 0,20

± 0,05
± 0,10

≤ 0,40
≤ 1,00
≤ 0,80
≥ 0,50 ≤ 1,00

± 0,01
± 0,05
± 0,05
± 0,05

≤ 0,08

± 0,01

± 0,07
± 0,10

8.3 Mechanical properties
The mechanical properties of the tubes covered by this document shall conform to the requirements in Tables, 6, 7,
8 and 9.

14


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)


Table 6 — Delivery conditions and mechanical properties for tubes made from ferritic and martensitic
corrosion resistant steels
Steel grade

Steel
name

Delivery
condition

Proof strength
min.
MPa a
Rp1,0
Rp0,2

Steel
number

X2CrTi12
X6CrAl13
X6Cr17
X3CrTi17

1.4512
1.4002
1.4016
1.4510


+A
+A
+A
+A

X12Cr13

1.4006

+QT 550
+QT 650

Ferritic steels
220
380
220
400
250
430
240
420
Martensitic steels
400
410
550
450
460
650

210

210
240
230

a

1 MPa = 1 N/mm

b

When tested in accordance with EN ISO 3651-2.

c
d

Tensile
strength
min.
MPa
Rm

Elongation
A
min.
%
tc
lc

Resistance to
intergranular

corrosion b

25
17
20
23

25
17
20
23

No
No
Yes d
Yes

15
12

15
12

No
No

2

l = longitudinal, t = transverse.
Not if welding is subsequently carried out.


15


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)

Table 7 — Delivery conditions and mechanical properties for tubes made from austenitic corrosion
resistant steels
Steel grade

Delivery
condition

Proof strength
min.
a
MPa

Steel name

Steel
number

X2CrNi18-9
X2CrNi19-11
X2CrNiN18-10
X5CrNi18-10
X8CrNiS18-9

X6CrNiTi18-10

1.4307
1.4306
1.4311
1.4301
1.4305
1.4541

X6CrNiNb18-10
X1CrNi25-21
X2CrNiMo17-12-2
X5CrNiMo17-12-2
X1CrNiMoN25-22-2
X6CrNiMoTi17-12-2

X6CrNiMoNb17-12-22
X2CrNiMoN17-13-3
X3CrNiMo17-13-3
X2CrNiMo18-14-3
X2CrNiMoN17-13-5
X1NiCrMoCu31-27-4
X1NiCrMoCu25-20-5
X1CrNiMoCuN20-18-7
X1NICrMoCuN25-207
X2NiCrAlTi32-20

Resistance to
intergranular
corrosion b


Rp0,2

Rp1,0

Rm

lc

tc

180
180
270
195
190
200

215
215
305
230
230
235

460
460
550
500
500

500

40
40
35
40
35
35

35
35
30
35
35
30

Yes
Yes
Yes
Yes d
No
Yes

180

215

460

35


30

Yes

205
180
190
205
260
210

240
210
225
240
295
245

510
470
490
510
540
500

35
45
40
40

40
35

30
40
30
30
30
30

Yes
Yes
Yes
Yes d
Yes

190

225

490

35

30

Yes

1.4580
1.4429

1.4436
1.4435
1.4439
1.4563
1.4539
1.4547
1.4529

215
295
205
190
285
215
230
300
270

250
330
240
225
315
245
250
340
310

510
580

510
490
580
500
520
650
600

35
35
40
40
35
40
35
35
35

30
30
30
35
30
35
30
30
-

Yes
Yes

Yes d
Yes
Yes
Yes
Yes
Yes
Yes

1.4558

+AT

180

210

450

35

-

-

1.4550
1.4335
1.4404
1.4401
1.4466
1.4571


1 MPa = 1 N/mm

b

When tested in accordance with EN ISO 3651-2.

c

l = longitudinal, t = transverse.

16

Elongation
A
min.
%

+AT
+AT
+AT
+AT
+AT
+AT (Cold
finished)
+AT (Hot
finished)
+AT
+AT
+AT

+AT
+AT
+AT (Cold
finished)
+AT(Hot
finished)
+AT
+AT
+AT
+AT
+AT
+AT
+AT
+AT
+AT

a

d

Tensile
strength
min
MPa

2

Normally not fulfilled in the sensitized condition.



Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)

Table 8 — Delivery conditions and mechanical properties for tubes made from austenitic-ferritic
corrosion resistant steels
Steel grade

Delivery
condition

Proof strength
min

Tensile
strength
min

MPa a
Steel name

Steel
number

Rp0,2

Elongation
A
min


MPa

Rp1,0

Rm

l

%

c

t

Resistance to
intergranular
corrosion b

c

Austenitic-ferritic steels
X3CrNiMoN27-5-2
X2CrNiMoN29-7-2 e
X2CrNiMoN22-5-3
X2CrNiMoSi18-5-3
X2CrNiN23-4 e
X2CrNiMoN25-7-4 e
X2CrNiMoCuN26-6-3
X2CrNiMoCuWN25-7-4


1.4460
1.4477
1.4462
1.4424
1.4362
1.4410
1.4507
1.4501

+AT
+AT
+AT
+AT
+AT
+AT
+AT
+AT

460
550 d
450
480
400
550
500
550

470
560 d
460

490
410
640
510
640

620
750 d
640
700
600
800
700
800

20
25
22
30
25
20
20
20

25
30
25
20
20
20


a

1 MPa = 1 N/mm2

b

When tested in accordance with EN ISO 3651-2.

c

l = longitudinal, t = transverse.

d

For thicknesses < 10mm the values for Rp0.2 and Rp1.0 are increased by 100 MPa and Rm by 50 MPa.

e

Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes

Patented steel grade.


Table 9 — Delivery conditions and mechanical properties for tubes made from ferritic and austenitic
heat resisting steels
Steel grade

Steel name

Delivery
condition

Steel
number

X18CrN28

1.4749

X8CrNITi18-10
X9CrNiSiNCe21-11-2
X12CrNi23-13
X8CrNi25-21
X10NiCrAlTi32-21
X6NiCrSiNCe35-25 c

1.4878
1.4835
1.4833
1.4845
1.4876
1.4854


a

1 MPa = 1 N/mm

b

l = longitudinal, t = transverse.

c

Patented steel grade.

Proof strength

Rp0,2
Ferritic steels
+A
280
Austenitic steels
+AT
190
+AT
310
+AT
210
+AT
210
+AT
170
+AT

300

min

Tensile
strength
min

MPaa

MPa

Rp1,0

230
350
250
250
210
340

Elongation
A
min
%

Rm

l


b

tb

500

15

15

500
650
500
500
450
650

40
37
33
33
28
40

40
40
35
35
30
40


2

17


Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 15 10:51:42 GMT+00:00 2007, Uncontrolled Copy, (c) BSI

EN 10297-2:2005 (E)

8.4 Appearance and soundness
8.4.1

Appearance

Tubes shall be free from external and internal surface defects that can be detected by visual
8.4.1.1
examination.
8.4.1.2
The internal and external surface finish of the tubes shall be typical of the manufacturing process
and, where applicable, the heat treatment employed. The finish and surface condition shall be such that any
surface imperfections requiring dressing can be identified.
8.4.1.3
It shall be permissible to remove surface imperfections only by grinding or machining provided
that, after so doing, the tube thickness in the dressed area is not less than the specified minimum wall
thickness. All dressed areas shall blend smoothly into the contour of the tube.
Surface imperfections which encroach on the minimum wall thickness shall be considered defects
8.4.1.4
and tubes containing these shall be deemed not to conform to this document.
8.4.2


Soundness

When Option 3 is specified, tubes supplied with specific inspection and testing shall be subjected to nondestructive testing.
Option 3:
11.3.

Non-destructive testing for the full length of each tube shall be carried out in accordance with

When Option 4 is specified, tubes supplied with specific inspection and testing shall be subjected to a leak
tightness test.
Option 4:

Leak tightness testing of each tube shall be carried out in accordance with 11.2.

8.5 Straightness
For tubes with a specified outside diameter equal to or greater than 33,7 mm, the deviation from straightness
over any tube length L, where L is the manufacturer’s delivered length, shall not exceed 0,0020 L, unless
Option 5 is specified. For tubes with outside diameters less than 33,7 mm, the straightness and the method of
measurement shall be agreed at the time of enquiry and order.
Option 5

The deviation from straightness shall not exceed 0,0015 L.

8.6 End preparation
Tubes shall be delivered with square cut ends. The ends shall be free from excessive burrs.

8.7 Dimensions, masses, lengths, tolerances and sectional properties
8.7.1


Outside diameter, wall thickness and mass

Outside diameters and wall thicknesses for tube covered by this document shall be as given in EN ISO 1127.
For calculation of mass, the densities given in EN 10088-1 shall apply.
NOTE

18

Dimensions that are not included in EN ISO 1127 may be agreed at the time of enquiry and order.