Steel flat products for pressure purposes — Technical delivery conditions — Part 3: Weldable fine grain steels, normalized

ISO 9328-3:2018 specifies the requirements for flat products for pressure equipment made of weldable fine grain steels as specified in Tables A.1 and B.1. The requirements and definitions of ISO 9328‑1 also apply to this document. NOTE 1 Fine grain steels are understood as steels with a ferritic grain size of 6 or finer when tested in accordance with ISO 643. NOTE 2 This document offers the possibility to specifying products in accordance with European design codes and ASME-type design codes.

Produits plats en acier pour service sous pression — Conditions techniques de livraison — Partie 3: Aciers soudables à grains fins, normalisés

General Information

Status
Published
Publication Date
31-Jan-2018
Current Stage
6060 - International Standard published
Start Date
01-Feb-2018
Completion Date
01-Feb-2018
Ref Project

RELATIONS

Buy Standard

Standard
ISO 9328-3:2018 - Steel flat products for pressure purposes -- Technical delivery conditions
English language
19 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

INTERNATIONAL ISO
STANDARD 9328-3
Fourth edition
2018-02
Steel flat products for pressure
purposes — Technical delivery
conditions —
Part 3:
Weldable fine grain steels, normalized
Produits plats en acier pour service sous pression — Conditions
techniques de livraison —
Partie 3: Aciers soudables à grains fins, normalisés
Reference number
ISO 9328-3:2018(E)
ISO 2018
---------------------- Page: 1 ----------------------
ISO 9328-3:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© 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. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 9328-3:2018(E)
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 ...................................................................................................................................................................... 3

6.4 Mechanical properties ...................................................................................................................................................................... 4

6.5 Surface condition .................................................................................................................................................................................. 4

6.6 Internal soundness .............................................................................................................................................................................. 5

6.7 Weldability .................................................................................................................................................................................................. 5

6.8 Dimensions and tolerances .......................................................................................................................................................... 5

6.9 Calculation of mass .............................................................................................................................................................................. 5

6.10 Resistance to hydrogen-induced cracking....................................................................................................................... 5

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 .......................................................................................................................................................................................................................... 6

Annex A (normative) Chemical composition and mechanical properties of products

delivered in accordance with European design codes .................................................................................................. 7

Annex B (normative) Chemical composition and mechanical properties of products

delivered in accordance with ASME-type design codes.............................................................................................13

Annex C (informative) Steel designations in accordance with this document and

designation of comparable steel grades in national or regional standards ........................................17

Annex D (informative) Evaluation of resistance to hydrogen-induced cracking .................................................18

Bibliography .............................................................................................................................................................................................................................19

© ISO 2018 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 9328-3:2018(E)
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 9328-3:2011), which has been technically

revised. The following changes have been made:
— the term “product thickness” has been replaced with “nominal thickness”;

— classification of the steels, examples of ordering and statements concerning weldability have been

revised;
— the technical data in Annex A have been aligned with EN 10028-3.

— 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
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 9328-3:2018(E)
Steel flat products for pressure purposes — Technical
delivery conditions —
Part 3:
Weldable fine grain steels, normalized
1 Scope

This document specifies the requirements for flat products for pressure equipment made of weldable

fine grain steels as specified in Tables A.1 and B.1. The requirements and definitions of ISO 9328-1 also

apply to this document.

NOTE 1 Fine grain steels are understood as steels with a ferritic grain size of 6 or finer when tested in

accordance with ISO 643.

NOTE 2 This document offers the possibility to specifying products in accordance with European design

codes and ASME-type design codes.
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

EN 10314, Method for the derivation of minimum values of proof strength of steel at elevated temperatures

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
4.1.1 The steel grades covered by this document are given in four qualities:
a) the room temperature quality (P...N; PT…N);
© ISO 2018 – All rights reserved 1
---------------------- Page: 5 ----------------------
ISO 9328-3:2018(E)
b) the elevated temperature quality (P...NH; PT…NH);
c) the low temperature quality (P...NL1; PT…NL1);
d) the special low temperature quality (P...NL2).

4.1.2 In accordance with ISO 4948-1 and ISO 4948-2, the grades P275NH, P275NL1, P355N, P355NH,

P355NL1, P355NL2, PT400N, PT400NH, PT400NL1, PT440N, PT440NH, PT440NL1, PT490N and

PT490NH are alloy-quality steels, the grades P275NL2 and the grades P420NH, P420NL1, P420NL2,

P460NH, P460NL1, P460NL2, PT520N and PT520NH are alloyed special steels.
4.2 Designation
Shall be in accordance with ISO 9328-1.

NOTE 1 Steel grades in Annex A are classified in accordance with their yield strength; steel 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.

Additionally, for steel grades in accordance with Annex B, the test direction for the impact test shall be

agreed upon (see 9.2 and Table B.4, footnote ).
5.2 Options

A number of options are specified in this document. These are listed below under a) to r). 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 (see ISO 9328-1):
a) delivery condition other than specified in Tables A.3 and B.3 (see 6.2.1);
b) tests in the simulated normalized condition (see 6.2.2);
c) delivery of products in the untreated condition (see 6.2.3);
d) maximum carbon-equivalent value (see 6.3.3);

e) specification of an impact energy value of 40 J (see Note to 6.4.1 and Table A.3);

f) application of the R values of Table A.4 for the corresponding P…NL1 and P...NL2 grades (see 6.4.2);

p0,2
g) test on simulated heat-treated samples (see 6.7.2);
h) hydrogen-induced cracking (HIC) test in accordance with Annex D (see 6.10);

i) mid-thickness test pieces for the impact test and/or tensile test (see Clause 8);

j) verification of impact energy for longitudinal test pieces (see 9.3);

k) tensile properties for increased nominal thicknesses (see Table A.3, footnote );

l) R values at elevated temperatures for increased nominal thicknesses (see Table A.4, footnote );

p0,2
2 © ISO 2018 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 9328-3:2018(E)

m) modified values for R and R for grades P460NH and P460NL1 (see Table A.3, footnote );

eH m

o) altered maximum value for Cr, Cu, Mo, Nb, Ni, Ti and V (see Table B.1, footnote );

p) Al content < 0,020 % (see Table B.1, footnote );
total

q) increased maximum carbon contents for grades PT…NH (see Table B.1, footnote );

r) other test requirements for the impact test (see Table B.4, 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 P275NL2 as specified in this document, to be delivered

with inspection certificate 3.1 as specified in ISO 10474, is designated as follows:

10 plates – 50 × 2 000 × 10 000 – ISO 9328-3 P275NL2 – 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 (see 6.2.3), the products covered by

this document shall be supplied in the normalized condition.

For steels with minimum yield strength ≥ 460 MPa, delayed cooling or additional tempering is

permitted. If such a treatment is performed, this shall be noted in the inspection document.

6.2.2 At the discretion of the manufacturer, normalizing may be replaced with normalizing rolling for the

steel grades in Annex A (see ISO 9328-1:2018, 3.1). 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 2).

6.2.3 If so agreed at the time of enquiry and order, products covered by this document may be delivered

in the untreated condition. The products delivered in untreated conditions shall be appropriately marked

(+AR) to denote that heat treatment has not been performed.

6.2.4 For products delivered untreated, the specified tests shall be carried out by the manufacture on

test pieces in the simulated normalized condition (but see 6.2.1).

NOTE Tests in a simulated heat-treated condition are carried out to verify the suitability of the final product

in the usual delivery condition. 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 apply for the chemical composition according to the cast

(heat) analysis.

6.3.2 The product analysis may deviate from the specified values of the cast (heat) analysis given in

Tables A.1 and B.1 by the values given in Table 1.
© ISO 2018 – All rights reserved 3
---------------------- Page: 7 ----------------------
ISO 9328-3:2018(E)

6.3.3 For steel grades covered by this document, a carbon-equivalent value according to Table A.2

(steel grades in Annex A) or Table B.2 (steel grades in Annex B) may be agreed upon at the time of

enquiry and order.

Table 1 — Permissible deviations of the product analysis from the specified limits given in

Tables A.1 and B.1 for the cast (heat) analysis
Specified limit of the cast (heat) analysis
Permissible deviation of the product analysis
Element according to Tables A.1 and B.1
% by mass % by mass
C ≤
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.