Heat-resistant cast steels and alloys for general applications

ISO 11973:2015 specifies chemical composition and mechanical properties of cast steels and alloys for heat-resistant service.

Aciers et alliages moulés réfractaires destinés à des applications générales

General Information

Status
Published
Publication Date
07-Sep-2015
Current Stage
9092 - International Standard to be revised
Start Date
17-Nov-2021
Completion Date
17-Nov-2021
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ISO 11973:2015 - Heat-resistant cast steels and alloys for general applications
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INTERNATIONAL ISO
STANDARD 11973
Second edition
2015-09-15
Heat-resistant cast steels and alloys
for general applications
Aciers et alliages moulés réfractaires destinés à des applications
générales
Reference number
ISO 11973:2015(E)
ISO 2015
---------------------- Page: 1 ----------------------
ISO 11973:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

All rights reserved. Unless otherwise specified, 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
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CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
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ISO 11973:2015(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

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

3 General conditions for delivery ............................................................................................................................................................ 1

4 Heat treatment ....................................................................................................................................................................................................... 1

5 Chemical composition ..................................................................................................................................................................................... 1

6 Mechanical properties .................................................................................................................................................................................... 1

7 Maximum use temperature ....................................................................................................................................................................... 1

8 Supplementary requirements ................................................................................................................................................................ 1

Annex A (informative) UNS cast grades similar to ISO cast grades ....................................................................................... 5

Bibliography ................................................................................................................................................................................................................................ 6

© ISO 2015 – All rights reserved iii
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ISO 11973:2015(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 meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC17, Steel, Subcommitee SC11, Steel castings.

This second edition cancels and replaces the first edition (ISO 11973:1999), which has been technically

revised with the following changes:
— Clause 8 revised;
— Table 1 composition limits modified — various grades;
— Tables 1 and 2 — grade number added;
— Annex A added.
iv © ISO 2015 – All rights reserved
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INTERNATIONAL STANDARD ISO 11973:2015(E)
Heat-resistant cast steels and alloys for general applications
1 Scope

This International Standard specifies chemical composition and mechanical properties of cast steels

and alloys for heat-resistant service.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

ISO 4990, Steel castings — General technical delivery requirements
3 General conditions for delivery

Materials furnished in conformity with this International Standard shall conform to the applicable

requirements of ISO 4990 including the supplementary requirements that are indicated on the enquiry

and purchase order.
4 Heat treatment

GX40CrSi13, GX40CrSi17, GX30CrSi7, GX40CrSi24, GX40CrSi28, and GX130CrSi29 may be annealed at a

temperature of 800 °C to 850 °C. If required, GX30CrSi7 may also be supplied in the as-cast condition.

Other grades produced according to this International Standard do not require heat treatment. If heat

treatment is required, the treatment should be established by agreement between the manufacturer

and the purchaser, and shou
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