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STANDARD 6508-1
Fifth edition
2023-12
Metallic materials — Rockwell
hardness test —
Part 1:
Test method
Matériaux métalliques — Essai de dureté Rockwell —
Partie 1: Méthode d'essai
Reference number
ISO 6508-1:2023(E)
© ISO 2023
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ISO 6508-1:2023(E)
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© ISO 2023 – All rights reserved
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ISO 6508-1:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols, abbreviated terms and designations . 1
5 Rockwell hardness . .3
6 Testing machine.4
7 Test piece . 5
8 Procedure .5
9 Uncertainty of the results . 7
10 Test report . 7
11 Conversions to other hardness scales or tensile strength values .8
Annex A (normative) Special HR30TSm and HR15TSm test for thin products .9
Annex B (normative) Minimum thickness of the test piece in relation to the Rockwell
hardness .10
Annex C (normative) Corrections to be added to Rockwell hardness values obtained on
convex cylindrical surfaces .13
Annex D (normative) Corrections to be added to Rockwell hardness C scale values obtained
on spherical test surfaces of various diameters .16
Annex E (normative) Daily verification procedure .17
Annex F (normative) Inspection of diamond indenters .20
Annex G (informative) Uncertainty of the measured hardness values .
...