National foreword
National Annex NA (informative) - Reference block
design (examples)
National Annex NB (informative) - Bibliography
Foreword
1 Scope
2 Normative references
3 Manufacture of reference blocks
4 Calibration machine
5 Calibration procedure
6 Number of indentations
7 Non-uniformity of reference block
8 Marking
9 Validity
Annex A (informative) - Uncertainty of the mean
hardness value of reference blocks
Bibliography