ISO 16468:2025

International
Standard
ISO 16468
Third edition
Investment castings (steel, nickel
2025-05
alloys and cobalt alloys) — General
technical requirements
Pièces moulées en cire perdue (acier, alliages de nickel et alliages
de cobalt) — Exigences techniques générales
Reference number
© ISO 2025
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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

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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
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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).
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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.

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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 iro
...