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ISO 4955:2005(en) Heat-resistant steels

2024-08-30 12:15:46 wiremeshxr

ISO 4955:2005(en) Heat-resistant steels

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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 4955 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 4, Heat treatable and alloy steels.

This third edition cancels and replaces the second edition (ISO 4955:1994), which has been technically revised.

1   Scope

1.1   This International Standard specifies requirements for the grades of wrought steels, listed in Table 1, which are usually employed for products for which the resistance to the effects of hot gases and the products of combustion at temperatures in the region above 550 °C is the main requirement.
1.2   This International Standard is applicable to
  • — flat products;
  • — bars;
  • — sections;
  • — wire and rod;
  • — forgings.

NOTE 1 Heat-resisting steels for valves are covered by ISO 683-15.

NOTE 2 Corrosion-resistant stainless steels for which resistance to corrosion is of primary importance are covered by ISO 16143-1, ISO 16143-2 and ISO 16143-3.

NOTE 3 Not all of the steels included in this International Standard are necessarily available in all product forms.

NOTE 4 Wire in the cold-worked condition is covered by ISO 16143-3.

1.3   In addition to this International Standard, the general technical delivery requirements of ISO 404 are applicable.

2   Normative references

The following referenced documents are indispensable for the application 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 377:1997 + Cor.1:1997, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing (including Technical Corrigendum 1:1997)

  • ISO 404:1992, Steel and steel products — General technical delivery requirements

  • ISO 4885:1996, Ferrous products — Heat treatments — Vocabulary

  • ISO/TS 4949:2003, Steel names based on letter symbols

  • ISO 6506-1:1999, Metallic materials — Brinell hardness test — Part 1: Test method

  • ISO 6892:1998, Metallic materials — Tensile testing at ambient temperature

  • ISO 6929:1987, Steel products — Definitions and classification

  • ISO/TR 9769:1991, Steel and iron — Review of available methods of analysis

  • ISO 10474:1991, Steel and steel products — Inspection documents

  • ISO 14284:1996, Steel and iron — Sampling and preparation of samples for the determination of chemical composition

3   Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 377, ISO 404, ISO 4885, ISO 6929, ISO 14284 and the following apply.
3.1
heat-resisting steels
steels used at above 550 °C (wustite point) due to their excellent resistance to the effects of hot gases and products of combustion, as well as their resistance to the influence of molten salts and molten metals, but also showing good mechanical properties during short- and long-term stressing.

Bibliography

[1]ISO 683-15:1992, Heat-treatable steels, alloy steels and free-cutting steels — Part 15: Valve steels for internal combustion engines
[2]ISO/TS 15510:2003, Stainless steels — Chemical composition
[3]ISO 16143-1:2004, Stainless steels for general purposes — Part 1: Flat products
[4]ISO 16143-2:2004, Stainless steels for general purposes — Part 2: Semi-finished products, bars, rods and sections
[5]ISO 16143-3:—1), Stainless steels for general purposes — Part 3: Wire
[6]EN 10095:1999, Heat resisting steels and nickel alloys
[7]EN 10222-5:1999, Steel forgings for pressure purposes — Part 5: Martensitic, austenitic and austenitic ferritic stainless steels
1) To be published.


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label: ISO 4955:2005(en) Heat-resistant steels
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