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.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
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 Uniformity of reference blocks (normative)
Annex B Uncertainty of the mean hardness value of hardness-reference blocks (informative)
Annex C Requirements for reference diamond indenters (normative)
ISO 376:2011 Metallic materials -- Calibration of force-proving instruments used for the verification of uniaxial testing machines
ISO 6508-1:2015 Metallic materials -- Rockwell hardness test -- Part 1: Test method
ISO 6508-2:2015 Metallic materials -- Rockwell hardness test -- Part 2: Verification and calibration of testing machines and indenters
ISO 376:2011 Metallic materials -- Calibration of force-proving instruments used for the verification of uniaxial testing machines
ISO 6508-1:2015 Metallic materials -- Rockwell hardness test -- Part 1: Test method
ISO 6508-2:2015 Metallic materials -- Rockwell hardness test -- Part 2: Verification and calibration of testing machines and indenters