ISO 9328-2:2018

Steel flat products for pressure purposes - Technical delivery conditions - Part 2: Non-alloy and alloy steels with specified elevated temperature properties

ISO 9328-2:2018 specifies the technical delivery conditions for plates and strip for pressure equipment made of non-alloy and alloy steels as specified in Tables A.1 and B.1. The requirements and definitions of ISO 9328‑1 also apply to this document.

Produits plats en acier pour service sous pression — Conditions techniques de livraison — Partie 2: Aciers non alliés et aciers alliés avec caractéristiques spécifiées à température élevée

General Information

• Status: Published
• Publication Date: 31-Jan-2018
• ICS: 77.140.30 - Steels for pressure purposes
• ICS: 77.140.50 - Flat steel products and semi-products
• Technical Committee: ISO/TC 17/SC 10 - Steel for pressure purposes
• Drafting Committee: ISO/TC 17/SC 10 - Steel for pressure purposes
• Current Stage: 9092 - International Standard to be revised
• Start Date: 17-Jul-2024
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO 9328-2:2011 - Steel flat products for pressure purposes - Technical delivery conditions - Part 2: Non-alloy and alloy steels with specified elevated temperature properties
• Effective Date: 30-Jul-2016

Overview

ISO 9328-2:2018 - "Steel flat products for pressure purposes - Technical delivery conditions - Part 2" defines the technical delivery conditions for plates and strip used in pressure equipment made from non‑alloy and alloy steels with specified elevated temperature properties. It complements ISO 9328-1 (general requirements) and provides grade‑specific chemical, mechanical and delivery‑condition requirements (see Annexes A and B).

Key topics and technical requirements

• Scope and applicability: Applies to plates and strip for pressure equipment; steel grades and limits are listed in Tables A.1 and B.1. Definitions and general requirements of ISO 9328‑1 apply.
• Classification & designation: Differentiates non‑alloy grades (e.g., P235GH, P265GH, P295GH, P355GH, PT410GH, PT450GH) from alloyed special steels, with designation rules per ISO 9328‑1.
• Delivery conditions: Default and optional delivery conditions include normalized (+N), normalized and tempered (+NT), quenched & tempered (+QT) and untreated (+AR). Normalizing rolling and simulated heat‑treatment tests are covered.
• Chemical composition & product analysis: Requirements per cast (heat) analysis in Tables A.1/B.1, with permitted product analysis deviations.
• Mechanical properties & testing: Tensile, yield and impact requirements at ambient and elevated temperatures; options for mid‑thickness test pieces and impact energy values.
• Special tests & integrity checks: Hydrogen‑induced cracking (Annex G), step‑cooling (Annex H), weldability requirements, resistance to hydrogen‑induced cracking and embrittlement of CrMo steels.
• Inspection, sampling & marking: Types of inspection documents (inspection certificate 3.1 per ISO 10474 is an example), sampling plans, retests, sorting and marking rules.
• Informative annexes: Cross‑references to EN/ASTM/ASME/JIS equivalents (Annex C), heat‑treatment guidelines (Annex D), time‑temperature parameters and creep reference data (Annexes E and F).

Practical applications and who uses it

ISO 9328-2 is intended for:

• Steel producers and mills supplying plates and strip for pressure vessels, boilers, heat exchangers and piping where elevated temperature performance is required.
• Fabricators and welders specifying delivery conditions and verifying material suitability after heat treatment.
• Procurement and quality managers establishing technical delivery conditions in purchase orders.
• Inspectors, testing laboratories and certification bodies performing compositional and mechanical testing, HIC and step‑cooling evaluations.
• Design engineers referencing material properties for high‑temperature pressure equipment compliance.

Related standards

• ISO 9328-1 - General delivery conditions for steel flat products for pressure purposes
• ISO 4948‑1 / ISO 4948‑2 - Steel classification standards
• ISO 10474 - Inspection certificates for steel products
• Regional and material standards referenced in annexes: EN 10028‑2, ASTM/ASME, JIS

Keywords: ISO 9328-2, steel flat products, pressure equipment, elevated temperature properties, technical delivery conditions, plates and strip, P235GH, 16Mo3, hydrogen‑induced cracking, heat treatment, inspection certificate.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 9328-2
Fourth edition
2018-02
Steel flat products for pressure
purposes — Technical delivery
conditions —
Part 2:
Non-alloy and alloy steels with
specified elevated temperature
properties
Produits plats en acier pour service sous pression — Conditions
techniques de livraison —
Partie 2: Aciers non alliés et aciers alliés avec caractéristiques
spécifiées à température élevée
Reference number
©
ISO 2018
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of 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 of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification and designation . 1
4.1 Classification . 1
4.2 Designation . 2
5 Information to be supplied by the purchaser. 2
5.1 Mandatory information . 2
5.2 Options . 2
5.3 Example for ordering . 3
6 Requirements . 3
6.1 Steelmaking process . 3
6.2 Delivery condition . 3
6.3 Chemical composition . 4
6.4 Mechanical properties . 5
6.5 Surface condition . 5
6.6 Internal soundness . 5
6.7 Weldability . 5
6.8 Dimensions and tolerances on dimensions . 6
6.9 Calculation of mass . 6
6.10 Resistance to hydrogen-induced cracking. 6
6.11 Embrittlement of CrMo steels . 6
7 Inspection . 6
7.1 Types of inspection and inspection documents . 6
7.2 Tests to be carried out . 6
7.3 Retests, sorting and reprocessing . 6
8 Sampling . 6
9 Test methods . 6
10 Marking . 7
Annex A (normative) Chemical composition and mechanical properties of products based
on European standards . 8
Annex B (normative) Chemical composition and mechanical properties of products based
on ASTM/ASME or JIS standards .17
Annex C (informative) Steel designations in accordance with this document and
designation of comparable steel grades in national or regional standards .22
Annex D (informative) Guidelines for heat treatment .24
Annex E (informative) Critical time-temperature parameter P and possible
crit.
combinations of stress relieving temperature and holding time .26
Annex F (informative) Reference data relating to strength for 1 % (plastic) creep strain and
creep rupture .27
Annex G (informative) Evaluation of resistance to hydrogen-induced cracking .33
Annex H (informative) Step cooling test .34
Bibliography .35
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of 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 of
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
different types of ISO documents should be noted. This document was drafted 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 of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of 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 information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity 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.
This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 10, Steel for
pressure purposes.
This fourth edition cancels and replaces the third edition (ISO 9328-2:2011), which has been technically
revised. The following changes have been made:
— the term “product thickness” has been replaced with “nominal thickness”;
— normalizing rolling is also considered for steel grade 16Mo3 (see Annex A);
— the technical data in Annex A have been aligned with EN 10028-2;
— in Table B.1, “B ≤ 0,001 0” has been added and the specifications of “P” and “S” have been changed.
A list of all the parts in the ISO 9328 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

INTERNATIONAL STANDARD ISO 9328-2:2018(E)
Steel flat products for pressure purposes — Technical
delivery conditions —
Part 2:
Non-alloy and alloy steels with specified elevated
temperature properties
1 Scope
This document specifies the technical delivery conditions for plates and strip for pressure equipment
made of non-alloy and alloy steels as specified in Tables A.1 and B.1. The requirements and definitions
of ISO 9328-1 also apply to this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
ISO 4948-1, 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 9328-1:2018, Steel flat products for pressure purposes — Technical delivery conditions — Part 1:
General requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 9328-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
4 Classification and designation
4.1 Classification
In accordance with ISO 4948-1 and ISO 4948-2, the steel grades P235GH, P265GH, P295GH and P355GH
(see Annex A) and PT410GH, PT450GH and PT480GH (see Annex B) are non-alloy-quality steels. All
other grades are alloyed special steels.
4.2 Designation
Shall be in accordance with ISO 9328-1.
NOTE 1 Non-alloy grades in Annex A are classified in accordance with their yield strength, non-alloy grades in
Annex B are classified in accordance with their tensile strength.
NOTE 2 Information on the designation of comparable steel grades in national or regional standards is given
in Annex C.
5 Information to be supplied by the purchaser
5.1 Mandatory information
Shall be in accordance with ISO 9328-1 and 6.2.3.
5.2 Options
A number of options are specified in this document. These are listed below under a) to t). Additionally,
the relevant options of ISO 9328-1 apply. If the purchaser does not indicate a wish to implement any of
these options at the time of enquiry and order, the products shall be supplied in accordance with the
basic specification (shall be in accordance with ISO 9328-1):
a) tests in the simulated normalized condition (see 6.2.2);
b) products delivered untreated (see 6.2.4 and 6.2.5);
c) maximum carbon-equivalent value for P235GH, P265GH, P295GH and P355GH (see 6.3.3);
h
d) specification of an impact energy value of 40 J (see Table A.2, footnote );
e) test on simulated heat-treated samples (see 6.7.2);
f) hydrogen-induced cracking (HIC) test in accordance with Annex G (see 6.10);
g) step cooling test in accordance with Annex H (see 6.11);
h) mid-thickness test pieces for the impact test and/or tensile test (see Clause 8);
b
i) lower copper content and maximum tin content (see Table A.1, footnote );
f
j) minimum chromium content of 0,80 % (see Table A.1, footnote );
k) maximum carbon content of 0,17 % for nominal thicknesses greater than 150 mm (see Table A.1,
g
footnote );
i
l) maximum contents of Al (≤ 0,020 %), Ti (≤ 0,01 %) and Zr (≤ 0,01 %) (see Table A.1, footnote );
a
m) mechanical properties for nominal thicknesses > 250 mm (see Table A.2, footnote );
n) specification of the delivery condition +QT where the usual delivery condition is +NT (see Table A.2,
c c
footnote and Table A.3, footnote );
i
o) additional impact energy values (see Table A.2, footnote );
p) 0,2 % proof strength (R ) values at elevated temperature for increased nominal thicknesses (see
p0,2
b
Table A.3, footnote );
c
q) increased carbon content for grades PT410GH, PT450GH and PT480GH (see Table B.1, footnote );
d
r) Al additions not permitted (see Table B.1, footnote );
2 © ISO 2018 – All rights reserved

s) specification of the delivery condition +NT for the grade 14CrMo9-10 and of the delivery condition
j
+QT for the grades 14CrMoV9-10 and 13CrMoV12-10 (see Table B.2, footnote );
i
t) requirement for impact tests and values (see Table B.2, footnote ).
5.3 Example for ordering
An order of 10 plates with nominal dimensions thickness = 50 mm, width = 2 000 mm, length =
10 000 mm, made of a steel grade with the name 16Mo3 as specified in this document, with inspection
certificate 3.1 as specified in ISO 10474, is designated as follows:
10 plates – 50 × 2 000 × 10 000 – ISO 9328-2 16Mo3 – Inspection certificate 3.1
6 Requirements
6.1 Steelmaking process
Shall be in accordance with ISO 9328-1.
6.2 Delivery condition
6.2.1 Unless otherwise agreed at the time of enquiry and order, the products covered by this document
shall be supplied in the usual conditions given in Tables A.2 and B.2.
6.2.2 Normalizing may, at the discretion of the manufacturer, be replaced with normalizing rolling for
the steel grades P235GH, P265GH, P295GH, P355GH and 16Mo3 (see Annex A). In this case, additional
tests in the simulated normalized condition with an agreed frequency of testing may be agreed upon
at the time of enquiry and order to verify that the obtained properties also comply with the standard
requirements (see 5.2, Option 1).
6.2.3 For products made of steel grades PT410GH, PT450GH, PT480GH, 19MnMo4-5, 19MnMo5-5 and
19MnMoNi5-5 (see Table B.2), the requested delivery condition normalized (+N) or untreated (+AR) (but
see 6.2.5) or, where applicable, quenched and tempered (+QT) shall be specified at the time of enquiry
and order.
6.2.4 If so agreed at the time of enquiry and order, products made of steel grades P235GH, P265GH,
P295GH, P355GH and 16Mo3 (see Table A.2) may also be delivered in the untreated condition (but see
6.2.5). Products made of one of the other alloy grades may be supplied in the tempered or normalized
condition or in the untreated condition, if so agreed.
The plates delivered in untreated conditions shall be appropriately marked (+AR) to denote that heat
treatment has not been performed. Steel grades containing more than 2 % Cr (inclusive) shall be
supplied in a stress relieved condition as a minimum.
NOTE Annex D contains heat treatment information for the purchaser.
6.2.5 For products delivered untreated in accordance with 6.2.3 and 6.2.4, testing shall be carried out
by the processor on test pieces in usual delivery condition as indicated in Tables A.2 and B.2.
NOTE Tests in a simulated heat-treated condition are made to verify the suitability of the delivered product
in the delivery condition +N, or +NT or +QT, as appropriate. However, they do not discharge the processor from
the obligation of providing proof of the specified properties in the finished product when adequately heat treated.
6.3 Chemical composition
6.3.1 The requirements of Tables A.1 and B.1 shall apply for the chemical composition according to the
cast (heat) analysis.
6.3.2 The product analysis shall not deviate from the values for the cast (heat) analysis specified in
Tables A.1 and B.1 by more than the values given in Table 1.
6.3.3 A maximum value for the carbon equivalent may be agreed upon at the time of enquiry and order
for steel grades P235GH, P265GH, P295GH and P355GH (see Annex A) and PT410GH, PT450GH and
PT480GH (see Annex B). In this case, Formula (1) shall apply for calculation of the carbon-equivalent
value (CEV):
Mn Cr++Mo VNiC+ u
CEVC=+ + + (1)
65 15
Table 1 — Permissible product analysis tolerances on the limiting values given in Tables A.1
and B.1 for the cast (heat) analysis
Specified value in the cast (heat)
Permissible deviation
analysis according to
a
of the product analysis
Element
Tables A.1 and B.1
% by mass % by mass
b
C ≤ 0,31 ±0,02
≤ 0,35 ±0,05
Si
> 0,35 to ≤ 1,00 ±0,06
≤ 1,00 ±0,05
Mn
> 1,00 to ≤ 1,70 ±0,10
≤ 0,015 +0,003
b
P
> 0,015 to ≤ 0,030 +0,005
b
S ≤ 0,010 +0,003
Al ≥ 0,010 ±0,005
B ≤ 0,003 +0,000 5
Ca ≤ 0,015 +0,003
≤ 0,020 +0,002
N
> 0,020 to ≤ 0,070 ±0,005
≤ 2,00 ±0,05
Cr
> 2,00 to ≤ 10,00 ±0,10
≤ 0,30 ±0,05
Cu
> 0,30 to ≤ 0,80 ±0,10
≤ 0,35 ±0,03
Mo
> 0,35 to ≤ 1,10 +0,04
Nb ≤ 0,10 ±0,01
≤ 0,30 +0,05
Ni
> 0,30 to ≤ 1,30 ±0,10
a
If several product analyses are carried out on one cast, and the contents of an individual element determined lie
outside the permissible range of the chemical composition specified for the cast analysis, then it is only allowed to exceed
the permissible maximum value or fall short of the permissible minimum value, but not both for one cast.
b
In the case of steel grades specified in Annex B, the maximum values listed in Table B.1 also apply for the product
analysis, except that Boron shall be 0,001 5 % for PT410GH, PT450GH, PT480GH, 19MnMo4-5, 19MnMo5-5, 19MnMo6-5,
19MnMoNi5-5, 19MnMoNi6-5 and 0,003 % for 14CrMoV9-10.
4 © ISO 2018 – All rights reserved

Table 1 (continued)
Specified value in the cast (heat)
Permissible deviation
analysis according to
a
of the product analysis
Element
Tables A.1 and B.1
% by mass % by mass
Cr+Cu+Mo+Ni ≤ 1,00 +0,05
Ti ≤ 0,035 ±0,01
≤ 0,05 ±0,01
V
> 0,05 to ≤ 0,30 ±0,03
a
If several product analyses are carried out on one cast, and the contents of an individual element determined lie
outside the permissible range of the chemical composition specified for the cast analysis, then it is only allowed to exceed
the permissible maximum value or fall short of the permissible minimum value, but not both for one cast.
b
In the case of steel grades specified in Annex B, the maximum values listed in Table B.1 also apply for the product
analysis, except that Boron shall be 0,001 5 % for PT410GH, PT450GH, PT480GH, 19MnMo4-5, 19MnMo5-5, 19MnMo6-5,
19MnMoNi5-5, 19MnMoNi6-5 and 0,003 % for 14CrMoV9-10.
6.4 Mechanical properties
6.4.1 The values given in Tables A.2, A.3 and B.2 (see also ISO 9328-1) shall apply.
6.4.2 Annex F gives, for the grades in Annex A, mean values as preliminary data for the purchaser on
the strength for 1 % (plastic) creep strain and creep rupture.
6.5 Surface condition
Shall be in accordance with ISO 9328-1.
6.6 Internal soundness
Shall be in accordance with ISO 9328-1.
6.7 Weldability
6.7.1 The steel grades specified in this document shall be suitable for welding processes in current use
(see also the Note to 6.7.2).
6.7.2 Information on welding can be found in appropriate documents, e.g. EN 1011-1 and EN 1011-2
or IIS/IIW 382-71.
Excessive post-weld heat treatment (PWHT) conditions can decrease the mechanical properties. When
in stress relieving, the intended time-temperature parameter shown by Formula (2):
−3
PT=+20 lgt ×10 (2)
()
s
where
T is the stress relieving temperature, in kelvins;
s
t is the holding time, in hours.
exceeds the critical (P .) values in Annex E, or where regarded as necessary in the case of Annex B
crit
steel grades, the purchaser should, in his enquiry and order, inform the manufacturer accordingly.
Where appropriate, tests on simulated heat-treated samples may be agreed at the time of enquiry and
order to check whether, after such a treatment, the properties specified in this document can still be
regarded as valid (see 5.2, Option 5).
6.8 Dimensions and tolerances on dimensions
Shall be in accordance with ISO 9328-1.
6.9 Calculation of mass
Shall be in accordance with ISO 9328-1.
6.10 Resistance to hydrogen-induced cracking
Since carbon and low-alloy steels may be susceptible to cracking when exposed to corrosive H S-
containing environments, usually referred to as “sour service”, a test to evaluate the resistance to
hydrogen-induced cracking in accordance with Annex G or another test method may be agreed at the
time of enquiry and order.
6.11 Embrittlement of CrMo steels
CrMo steels may tend to become brittle in service at temperatures between approximately 400 °C and
500 °C. This possible tendency for embrittlement can be simulated in the laboratory with the so-called
step cooling test. In this test, a specimen is exposed to a temperature-time cycle as given in Figure H.1.
The shift of a transition curve before and after the step cooling test is a measure for the embrittlement.
A step cooling test in accordance with Annex H may be agreed upon at the time of enquiry and order.
NOTE The step cooling test is primarily applicable to the weld metal and the heat-affected zone.
7 Inspection
7.1 Types of inspection and inspection documents
Shall be in accordance with ISO 9328-1.
7.2 Tests to be carried out
Shall be in accordance with ISO 9328-1 and 6.10 and 6.11.
7.3 Retests, sorting and reprocessing
Shall be in accordance with ISO 9328-1.
8 Sampling
Shall be in accordance with ISO 9328-1.
e
For an impact test (and/or the tensile test), that deviates from ISO 9328-1:2018, Table 3, footnote , test
pieces taken from the mid-thickness may be agreed upon at the time of enquiry and order. In this case,
test temperatures and minimum impact energy values shall also be agreed upon.
9 Test methods
9.1 Shall be in accordance with ISO 9328-1, and Annexes D and E.
6 © ISO 2018 – All rights reserved

9.2 For the steel grades specified in Annex B, the impact test shall only be carried out if so agreed at
the time of enquiry and order. Requirements and test conditions shall then also be agreed (see Table B.2,
l
footnote ).
10 Marking
Shall be in accordance with ISO 9328-1.
Annex A
(normative)
Chemical composition and mechanical properties of products
based on European standards
8 © ISO 2018 – All rights reserved

Table A.1 — Chemical composition [cast (heat) analysis]
a
% by mass
b
Steel grade C Si Mn P S Al N Cr Cu Mo Nb Ni Ti V Others
total
max. max.    max.
c
0,60
d d
P235GH ≤ 0,16 ≤ 0,35 0,025 0,010 ≥ 0,020 ≤ 0,012 ≤ 0,30 ≤ 0,30 ≤ 0,08 ≤ 0,020 ≤ 0,30 0,03 ≤ 0,02 —
to 1,20
0,80 to
d d
P265GH ≤ 0,20 ≤ 0,40 0,025 0,010 ≥ 0,020 ≤ 0,012 ≤ 0,30 ≤ 0,30 ≤ 0,08 ≤ 0,020 ≤ 0,30 0,03 ≤ 0,02
1,40
Cr+C+
0,08 to
d d
P295GH ≤ 0,40 0,90 to 1,50 0,025 0,010 ≥ 0,020 ≤ 0,012 ≤ 0,30 ≤ 0,30 ≤ 0,08 ≤ 0,020 ≤ 0,30 0,03 ≤ 0,02 Mo+Ni:
0,20
≤ 0,70
0,10 to
d d
P355GH ≤ 0,60 1,10 to 1,70 0,025 0,010 ≥ 0,020 ≤ 0,012 ≤ 0,30 ≤ 0,30 ≤ 0,08 ≤ 0,040 ≤ 0,30 0,03 ≤ 0,02
0,22
0,12 to 0,25
e
16Mo3 ≤ 0,35 0,40 to 0,90 0,025 0,010 ≤ 0,012 ≤ 0,30 ≤ 0,30 — ≤ 0,30 — — —
0,20 to 0,35
0,45
e
18MnMo4-5 ≤ 0,20 ≤ 0,40 0,90 to 1,50 0,015 0,005 ≤ 0,012 ≤ 0,30 ≤ 0,30 — ≤ 0,30 — — —
to 0,60
0,15 to 1,00 to 0,45 0,40
e
20MnMoNi4-5 ≤ 0,40 0,020 0,010 ≤ 0,012 ≤ 0,20 ≤ 0,20 — — ≤ 0,02 —
0,23 1,50 to 0,60 to 0,80
15NiCuM- 0,25 0,80 to 0,50 0,25 0,015 1,00
≤ 0,17 0,025 0,010 ≥ 0,015 ≤ 0,020 ≤ 0,30 — — —
oNb5-6-4 to 0,50 1,20 to 0,80 to 0,50 to 0,045 to 1,30
f
0,08 to 0,40 to 0,70 0,40
e
13CrMo4-5 ≤ 0,35 0,025 0,010 ≤ 0,012 ≤ 0,30 — — — — —
0,18 1,00 to 1,15 to 0,60
a
Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser, except for finishing the cast. All appropriate measures
shall be taken to prevent the addition from scrap or other materials used in steelmaking of these elements which may affect the mechanical properties and usability.
b
A lower maximum copper content and/or a maximum sum of copper and tin content, e.g. (Cu + 6Sn) ≤ 0,33 %, may be agreed upon at the time of enquiry and order, e.g. with
regard to hot formability for the grades where only a maximum copper content is specified.
c
For nominal thicknesses < 6 mm, a minimum manganese content of 0,20 % lower than specified is permitted.
d
A ratio Al:N ≥ 2 shall apply.
e
The Al content of the cast shall be determined and given in the inspection document.
f
If resistance to pressurized hydrogen is of importance, a minimum content of 0,80 % Cr may be agreed upon at the time of enquiry and order.
g
For nominal thicknesses greater than 150 mm, a maximum content of 0,17 % C may be agreed upon at the time of enquiry and order.
h
This grade may be produced with additions of either Ti + B or Nb + Ca. The following minimum contents shall apply: Ti ≥ 0,015 % and B ≥ 0,001 % in the case of additions of
Ti + B; Nb ≥ 0,015 % and Ca ≥ 0,000 5 % in the case of additions of Nb + Ca.
i
If so agreed at the time of enquiry and order, the Al content shall be ≤ 0,020 %, the Ti content shall be ≤ 0,01 %, and a Zr content of ≤ 0,01 % is specified.

10 © ISO 2018 – All rights reserved
Table A.1 (continued)
a
% by mass
b
Steel grade C Si Mn P S Al N Cr Cu Mo Nb Ni Ti V Others
total
max. max.    max.
c
0,60
d d
P235GH ≤ 0,16 ≤ 0,35 0,025 0,010 ≥ 0,020 ≤ 0,012 ≤ 0,30 ≤ 0,30 ≤ 0,08 ≤ 0,020 ≤ 0,30 0,03 ≤ 0,02 —
to 1,20
0,50 0,40 to 1,00 0,45
e
13CrMoSi5-5 ≤ 0,17 0,015 0,005 ≤ 0,012 ≤ 0,30 — ≤ 0,30 — — —
to 0,80 0,65 to 1,50 to 0,65
0,08 to 0,40 to 2,00 0,90
e
10CrMo9-10 ≤ 0,50 0,020 0,010 ≤ 0,012 ≤ 0,30 — — — — —
g
0,14 0,80 to 2,50 to 1,10
0,10 to 0,30 to 0,010 2,00 0,90
12CrMo9-10 ≤ 0,30 0,015 0,010 ≤ 0,012 ≤ 0,25 — ≤ 0,30 — — —
0,15 0,80 to 0,040 to 2,50 to 1,10
0,10 to 0,30 to 4,00 0,45
e
X12CrMo5 ≤ 0,50 0,020 0,005 ≤ 0,012 ≤ 0,30 — ≤ 0,30 — — —
0,15 0,60 to 6,00 to 0,65
≤ 0,002
0,11 to 0,30 to 2,00 0,90 0,25
e
13CrMoV9-10 ≤ 0,10 0,015 0,005 — ≤ 0,20 ≤ 0,07 ≤ 0,25 0,03 B ≤ 0,015
0,15 0,60 to 2,50 to 1,10 to 0,35
Ca
≤ 0,003
0,10 to 0,30 to 2,75 0,90 0,20
e h h h
12CrMoV12-10 ≤ 0,15 0,015 0,005 ≤ 0,012 ≤ 0,25 ≤ 0,07 ≤ 0,25 0,03 B ≤ 0,015
0,15 0,60 to 3,25 to 1,10 to 0,30
h
Ca
0,08 to 0,30 to 0,030 8,00 0,85 0,06 0,18
i i
X10CrMoVNb9-1 ≤ 0,50 0,020 0,005 ≤ 0,040 ≤ 0,30 ≤ 0,30 —
0,12 0,60 to 0,070 to 9,50 to 1,05 to 0,10 to 0,25
a
Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser, except for finishing the cast. All appropriate measures
shall be taken to prevent the addition from scrap or other materials used in steelmaking of these elements which may affect the mechanical properties and usability.
b
A lower maximum copper content and/or a maximum sum of copper and tin content, e.g. (Cu + 6Sn) ≤ 0,33 %, may be agreed upon at the time of enquiry and order, e.g. with
regard to hot formability for the grades where only a maximum copper content is specified.
c
For nominal thicknesses < 6 mm, a minimum manganese content of 0,20 % lower than specified is permitted.
d
A ratio Al:N ≥ 2 shall apply.
e
The Al content of the cast shall be determined and given in the inspection document.
f
If resistance to pressurized hydrogen is of importance, a minimum content of 0,80 % Cr may be agreed upon at the time of enquiry and order.
g
For nominal thicknesses greater than 150 mm, a maximum content of 0,17 % C may be agreed upon at the time of enquiry and order.
h
This grade may be produced with additions of either Ti + B or Nb + Ca. The following minimum contents shall apply: Ti ≥ 0,015 % and B ≥ 0,001 % in the case of additions of
Ti + B; Nb ≥ 0,015 % and Ca ≥ 0,000 5 % in the case of additions of Nb + Ca.
i
If so agreed at the time of enquiry and order, the Al content shall be ≤ 0,020 %, the Ti content shall be ≤ 0,01 %, and a Zr content of ≤ 0,01 % is specified.

a
Table A.2 — Mechanical properties (applicable to the transverse direction)
Tensile properties
Impact energy
at room temperature
Nominal
Elonga- KV
Yield Tensile
thickness
Usual
tion after J
strength strength
Steel grade delivery
fracture min.
b,c R R
condition eH m
A at a temperature in °C of
t
g g
mm MPa MPa % –20 0 +20
min. min.
≤ 16 235
16 < t ≤ 40 225
360 to 480
40 < t ≤ 60 215
d,e h h
P235GH +N 24 27 34 40
60 < t ≤ 100 200
100 < t ≤ 150 185 350 to 480
150 < t ≤ 250 170 340 to 480
≤ 16 265
16 < t ≤ 40 255
410 to 530
40 < t ≤ 60 245
d,e h h
P265GH +N 22 27 34 40
60 < t ≤ 100 215
100 < t ≤ 150 200 400 to 530
150 < t ≤ 250 185 390 to 530
≤ 16 295
16 < t ≤ 40 290
460 to 580
40 < t ≤ 60 285
d,e h h
P295GH +N 21 27 34 40
60 < t ≤ 100 260
100 < t ≤ 150 235 440 to 570
150 < t ≤ 250 220 430 to 570
≤ 16 355
16 < t ≤ 40 345 510 to 650
40 < t ≤ 60 335
d,e h h
P355GH +N 20 27 34 40
60 <
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