NF EN ISO 4545-2
Metallic materials - Knoop hardness test - Part 2 : verification and calibration of testing machines
ISO 4545-2:2005 specifies the method of verification of testing machines for determining Knoop hardness for metallic materials in accordance with ISO 4545-1. It covers test forces from 0,098 07 N to 19,614 N. The method is recommended only for indentations with diagonals greater than or equal to 0,020 mm.
ISO 4545-2:2005 specifies the method of verification of testing machines for determining Knoop hardness for metallic materials in accordance with ISO 4545-1. It covers test forces from 0,098 07 N to 19,614 N. The method is recommended only for indentations with diagonals greater than or equal to 0,020 mm.
ISO 4545-2:2017 specifies the method of verification and calibration of testing machines for determining Knoop hardness for metallic materials in accordance with ISO 4545‑1. A direct method of verification and calibration is specified for the testing machine, indenter, and the diagonal length measuring system. An indirect verification method using reference blocks is specified for the overall checking of the machine. If a testing machine is also to be used for other methods of hardness testing, it will be verified independently for each method.
- Avant-proposiv
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1 Domaine d'application1
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2 Références normatives1
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3 Conditions générales1
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4 Vérification directe2
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5 Vérification indirecte4
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6 Intervalles entre vérifications6
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7 Rapport de vérification/certificat d'étalonnage6
- Annexe A (informative) Notes sur les pénétrateurs en diamant7
- Annexe B (informative) Incertitude de mesure des résultats d'étalonnage de la machine d'essai de dureté8
- Bibliographie14
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