NF EN ISO 18265
Metallic materials - Conversion of hardness values
ISO 18265:2013 specifies the principles of the conversion of hardness values to equivalent values in other hardness scales and to estimates of tensile strength. It gives general information on the use of the conversion tables. The conversion tables in Annexes A to G apply to unalloyed and low alloy steels and cast steel, steels for quenching and tempering, steels for cold working, high speed steels, tool steels, hardmetals, and non-ferrous metals and alloys. Annex H gives information about the effects of changes of the test procedure in the standards specifying the hardness tests. Converted values obtained using ISO 18265:2013 are only directly applicable to the exact material tested. For all other materials, they provide an indicator only. In all cases, the converted values are not intended as replacements for values obtained by the correct standard method. In particular, tensile strength estimates are the least reliable converted values in ISO 18265:2013.
ISO 18265:2013 specifies the principles of the conversion of hardness values to equivalent values in other hardness scales and to estimates of tensile strength. It gives general information on the use of the conversion tables.
The conversion tables in Annexes A to G apply to unalloyed and low alloy steels and cast steel, steels for quenching and tempering, steels for cold working, high speed steels, tool steels, hardmetals, and non-ferrous metals and alloys.
Annex H gives information about the effects of changes of the test procedure in the standards specifying the hardness tests.
Converted values obtained using ISO 18265:2013 are only directly applicable to the exact material tested. For all other materials, they provide an indicator only. In all cases, the converted values are not intended as replacements for values obtained by the correct standard method. In particular, tensile strength estimates are the least reliable converted values in ISO 18265:2013.
<p>ISO 18265:2003 specifies the principles of the conversion of hardness values and gives general information on the use of conversion tables.</p> <p>The conversion tables apply to</p> <ul><li>unalloyed and low-alloy steels and cast iron;</li><li>steels for quenching and tempering;</li><li>cold working steels;</li><li>high speed steels;</li><li>hardmetals;</li><li>non-ferrous metals and alloys.</li></ul>
- Avant-proposiv
- Introductionv
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1 Domaine d'application1
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2 Principes de conversion1
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3 Application des tables de conversion4
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3.1 Généralités4
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3.2 Conversion des valeurs7
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3.3 Expression des résultats de conversion9
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3.4 Indications sur l'utilisation des tables de conversion10
- Annexe A (informative) Table de conversion pour des aciers non alliés et faiblement alliés et des aciers moulés12
- Annexe B (informative) Tables de conversion relatives aux aciers pour trempe et revenu18
- Annexe C (informative) Tables de conversion pour les aciers pour formage à froid36
- Annexe D (informative) Tables de conversion pour les aciers rapides47
- Annexe E (informative) Tables de conversion pour les métaux durs60
- Annexe F (informative) Tables de conversion pour les métaux et alliages non ferreux64
- Annexe G (informative) Tables de conversion pour les aciers à outils77
- Annexe H (informative) Remarques sur l'effet de conditions d'essai modifiées81
- Bibliographie85
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