National foreword

This British Standard is the UK implementation of ISO 16468:2025. It supersedes BS ISO 16468:2015, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee ISE/111, Steel Castings and Forgings.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2025.

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 document 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).

ISO draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s) which may be required to implement this document. However, implementers are cautioned that this may not represent the latest information, which may be obtained from the patent database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.

Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.

For an explanation of 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 www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 11, Steel castings.

This third edition cancels and replaces the second edition (ISO 16468:2015), which has been technically revised.

The main changes are as follows:

former subclauses 5.2.1 to 5.2.4 have been relabelled a to d, with revised wording to c.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

1 Scope

This document specifies technical requirements for castings (steel, nickel alloys, and cobalt alloys) produced by the investment casting process.

NOTE The International Standards specifying metallurgical material requirements for steel, nickel alloy, and cobalt alloy casting grades are listed in the Bibliography.

The requirements stated in this document form an integral part of the material specification. In cases of conflict, the requirements of this specification take precedence over the individual material specification requirements.

2 Normative references

3 Terms and definitions

4 Materials and manufacture

4.1 Melting process

4.2 Remelting process

5 Inspection and testing

5.1 General requirements

5.2 Sampling

6 Retests

7 Cleaning and dressing

8 Quality

8.1

8.2

9 Production welds

10 Supplementary requirements

10.1 General

10.2 Agreed manufacturing procedure

10.3 Magnetic particle inspection

10.4 Radiographic inspection

10.5 Liquid penetrant inspection

10.6 Ultrasonic inspection

10.7 Inspection of weld preparation

10.8 Prior agreement relating to major finishing welds

10.9 Impact test at low temperatures

10.10 Hardness test

10.11 Specified ferrite range in austenitic and austenitic ferritic stainless steels

10.12 Unspecified elements

10.13 Test material removed from castings

10.14 Tensile test blocks and specimen locations for castings

10.15 Weld maps (sketches)

10.16 Chemical analysis — Testing frequency

10.17 Tensile test — Testing frequency

10.18 Inspection documents

10.19 Marking

10.20 Decarburization

10.21 Metallurgical cleanliness

Bibliography

BS ISO 16468:2025

Investment castings (steel, nickel alloys and cobalt alloys) — General technical requirements

Current

Published:

31 May 2025