ISO/PRF 16468

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

ISO 16468:2015 specifies technical requirements for castings (steel, nickel alloys, and cobalt alloys) produced by the investment-casting process. 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 ISO 16468:2015 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.

Pièces moulées en cire perdue (acier, alliages de nickel et alliages de cobalt) — Exigences techniques générales

General Information

• Status: Not Published
• ICS: 77.140.80 - Iron and steel castings
• Technical Committee: ISO/TC 17/SC 11 - Steel castings
• Drafting Committee: ISO/TC 17/SC 11 - Steel castings
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 09-Apr-2025
• Completion Date: 09-Apr-2025

Relations

• Revises: ISO 16468:2015 - Investment castings (steel, nickel alloys and cobalt alloys) — General technical requirements
• Effective Date: 06-Jun-2022

Standards Content (Sample)

International
Standard
ISO 16468
Third edition
Investment castings (steel, nickel
alloys and cobalt alloys) — General
technical requirements
Pièces moulées en cire perdue (acier, alliages de nickel et alliages
de cobalt) — Exigences techniques générales
PROOF/ÉPREUVE
Reference number
ISO 16468:2025(en) © ISO 2025
ISO 16468:2025(en)
© ISO 2025
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
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
ii
ISO 16468:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Materials and manufacture . 2
4.1 Melting process .2
4.2 Remelting process .2
5 Inspection and testing . 2
5.1 General requirements .2
5.2 Sampling .2
6 Retests . 7
7 Cleaning and dressing . 8
8 Quality . 8
9 Production welds . 8
10 Supplementary requirements . 8
10.1 General .8
10.2 Agreed manufacturing procedure .8
10.3 Magnetic particle inspection .8
10.4 Radiographic inspection .8
10.5 Liquid penetrant inspection .8
10.6 Ultrasonic inspection.9
10.7 Inspection of weld preparation .9
10.8 Prior agreement relating to major finishing welds .9
10.9 Impact test at low temperatures .9
10.10 Hardness test .9
10.10.1 Brinell .9
10.10.2 Rockwell.9
10.10.3 Vickers .9
10.11 Specified ferrite range in austenitic and austenitic ferritic stainless steels .9
10.12 Unspecified elements .9
10.13 Test material removed from castings .10
10.14 Tensile test blocks and specimen locations for castings .10
10.15 Weld maps (sketches) .10
10.16 Chemical analysis — Testing frequency .10
10.17 Tensile test — Testing frequency . .10
10.18 Inspection documents.10
10.19 Marking .10
10.20 Decarburization . .10
10.21 Metallurgical cleanliness .10
Bibliography .11
PROOF/ÉPREUVE
iii
ISO 16468:2025(en)
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.
PROOF/ÉPREUVE
iv
International Standard ISO 16468:2025(en)
Investment castings (steel, nickel alloys and cobalt alloys) —
General technical requirements
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
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 4986, Steel and iron castings — Magnetic particle testing
ISO 4987, Steel and iron castings — Liquid penetrant testing
ISO 4990, Steel castings — General technical delivery requirements
ISO 4992-1, Steel castings — Ultrasonic testing — Part 1: Steel castings for general purposes
ISO 4992-2, Steel castings — Ultrasonic testing — Part 2: Steel castings for highly stressed components
ISO 4993, Steel and iron castings — Radiographic testing
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method
ISO 10474, Steel and steel products — Inspection documents
ISO 11970, Specification and qualification of welding procedures for production welding of steel castings
ISO 13520, Determination of ferrite content in austenitic stainless steel castings
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
PROOF/ÉPREUVE
ISO 16468:2025(en)
3.1
primary heat
master
mother heat
melt
quantity of metal processed in a single furnace or refining vessel at one time, in such a manner, a
...

2023-11-21 Style Definition
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page, Header distance from edge: 1.27 cm, Footer distance
ISO/DISPRF 16468:2023(E)
from edge: 1.27 cm
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ISO/TC17/SC11TC 17/SC 11
Secretariat: ANSI Formatted: Space After: 0 pt, Adjust space between Latin
and Asian text, Adjust space between Asian text and numbers
Date: 2025-04-08
Formatted: Cover Title_A1, Adjust space between Latin and
Investment castings (steel, nickel alloys and cobalt alloys) — General
Asian text, Adjust space between Asian text and numbers
technical requirements
Pièces moulées en cire perdue (acier, alliages de nickel et alliages de cobalt) — Exigences techniques générales
PROOF
Formatted: Font: 11 pt, Bold, English (United Kingdom)
ISO/DISPRF 16468:2024(E2025(en)
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Formatted: Font: 11 pt, Bold, English (United Kingdom)
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
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may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
Formatted: Font color: Auto, English (United Kingdom)
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'sISO’s member body in the country of the requester.
Formatted: Font color: Auto, English (United Kingdom)
ISO Copyright Office copyright office
Formatted: Font color: Auto, English (United Kingdom)
CP 401 • Ch. de Blandonnet 8
Formatted: zzCopyright address
CH-1214 Vernier, Geneva
Formatted: Font color: Auto, English (United Kingdom)
Phone: + 41 22 749 01 11
Formatted: Font color: Auto, English (United Kingdom)
Email: [e-mail]
Formatted: zzCopyright address
E-mail: [e-mail]
Formatted: Font color: Auto, French (Switzerland)
Website: www.iso.orgwww.iso.org
Formatted: French (Switzerland)
Formatted: Font color: Auto, French (Switzerland)
Published in Switzerland.
Formatted: zzCopyright address

Formatted: Font color: Auto, French (Switzerland)
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Formatted: English (United Kingdom)
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ii © ISO 2024 – All rights reserved
ii
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ISO/DISPRF 16468:2024(E2025(en)
Formatted: Font: 11 pt, Bold, English (United Kingdom)
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Formatted: Font: 11 pt, Bold, English (United Kingdom)
Contents Page
Formatted: Font: Bold
Foreword . v Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers, Tab stops: Not
1 Scope . 1
at 17.2 cm
2 Normative references . 1
3 Terms and definitions . 2
4 Materials and manufacture . 2
5 Inspection and testing . 3
6 Retests . 14
7 Cleaning and dressing . 15
8 Quality . 15
9 Production welds . 15
10 Supplementary requirements . 15
Bibliography . 19

Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Materials and manufacture . 2
4.1 Melting process . 2
4.2 Remelting process . 2
5 Inspection and testing . 2
5.1 General requirements . 2
5.2 Sampling . 2
6 Retests . 9
7 Cleaning and dressing . 9
8 Quality . 9
9 Production welds . 9
10 Supplementary requirements . 9
10.1 General . 9
10.2 Agreed manufacturing procedure . 9
10.3 Magnetic particle inspection . 9
10.4 Radiographic inspection . 9
10.5 Liquid penetrant inspection . 10
10.6 Ultrasonic inspection . 10
10.7 Inspection of weld preparation . 10
10.8 Prior agreement relating to major finishing welds . 10
10.9 Impact test at low temperatures . 10
10.10 Hardness test . 10
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iii
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ISO/DISPRF 16468:2024(E2025(en)
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10.10.1 Brinell . 10
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10.10.2 Rockwell. 10
Formatted: Font: Bold
10.10.3 Vickers . 10
10.11 Specified ferrite range in austenitic and austenitic ferritic stainless steels . 10
10.12 Unspecified elements . 11
10.13 Test material removed from castings . 11
10.14 Tensile test blocks and specimen locations for castings . 11
10.15 Weld maps (sketches) . 11
10.16 Chemical analysis — Testing frequency . 11
10.17 Tensile test — Testing frequency . 11
10.18 Inspection documents . 11
10.19 Marking . 11
10.20 Decarburization . 11
10.21 Metallurgical cleanliness . 11
Bibliography . 12

Formatted: FooterPageRomanNumber
iv © ISO 2024 – All rights reserved
iv
Formatted: Font: 11 pt, Bold, English (United Kingdom)
ISO/DISPRF 16468:2024(E2025(en)
Formatted: Font: 11 pt, Bold, English (United Kingdom)
Formatted: Font: Bold
Formatted: HeaderCentered, Left, Space After: 0 pt
Foreword
Formatted: Font: 11 pt, Bold, English (United Kingdom)
ISO (the International Organization for Standardization) is a worldwide federation of national standards
Formatted: Adjust space between Latin and Asian text,
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
Adjust space between Asian text and numbers
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). Formatted: English (United Kingdom)
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.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.htmlwww.iso.org/iso/foreword.html. Formatted: English (United Kingdom)
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 Formatted: English (United Kingdom)
revised.
The main changes are as follows: Formatted: Don't keep with next
Formatted: Font: Cambria, English (United
...