ISO 6508-3:2015
Metallic materials — Rockwell hardness test — Part 3: Calibration of reference blocks
ISO 6508-3:2015 specifies a method for the calibration of reference blocks to be used for the indirect and daily verification of Rockwell hardness testing machines, as specified in ISO 6508‑2:2015.
Attention is drawn to the fact that the use of hard metal for ball indenters is considered to be the standard type of Rockwell indenter ball. Steel indenter balls can be used only when complying with ISO 6508‑1:2015, Annex A.
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Foreword
1 Scope
2 Normative references
3 Manufacture of reference blocks
4 Calibration machine and calibration indenter
4.1 General
4.2 Calibration machine
4.3 Calibration diamond indenter
4.4 Calibration ball indenter
5 Calibration procedure
6 Number of indentations
7 Uniformity of hardness
8 Marking
9 Calibration certificate
10 Validity
Annex A (normative) Uniformity of reference blocks
Annex B (informative) Uncertainty of the mean hardness value of hardness-reference blocks
Annex C (normative) Requirements for reference diamond indenters
Bibliography
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Foreword
1 Scope
2 Normative references
3 Manufacture of reference blocks
4 Calibration machine and calibration indenter
4.1 General
4.2 Calibration machine
4.3 Calibration diamond indenter
4.4 Calibration ball indenter
5 Calibration procedure
6 Number of indentations
7 Uniformity of hardness
8 Marking
9 Calibration certificate
10 Validity
Annex A (normative) Uniformity of reference blocks
Annex B (informative) Uncertainty of the mean hardness value of hardness-reference blocks
Annex C (normative) Requirements for reference diamond indenters
Bibliography