Adopts ISO 6508-2:2005 to specify a method of verification of testing machines for determining Rockwell hardness scales A, B, C, D, E, F, G, H, K, N, T.
Table of contents
Header
About this publication
Preface
1 Scope
2 Normative references
3 General conditions
4 Direct verification
4.1 General
4.1.1
4.1.2
4.1.3
4.2 Calibration of the test force
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.3 Verification of the indenter
4.3.1 Diamond cone indenter (scales A, C, D, N)
4.3.1.1 Direct verification
4.3.1.1.1
4.3.1.1.2
4.3.1.1.3
4.3.1.1.4
4.3.1.1.5
4.3.1.2 Indirect verification
4.3.2 Ball indenter (scales B, E, F, G, H, K, T)
4.3.2.1
4.3.2.2
4.3.2.3
4.3.2.3.1
4.3.2.3.2
4.3.2.3.3
4.4 Calibration of the depth-measuring system
4.4.1
4.4.2
4.5 Verification of the testing cycle
5 Indirect verification
5.1 General
5.2 Procedure
5.2.1
5.2.2
5.3 Repeatability
5.3.1
5.3.2
5.4 Error
5.4.1
5.4.2
5.5 Uncertainty of measurement
6 Intervals between verifications
7 Verification report/calibration certificate
Annex A
Annex B
B.1 Direct calibration of the hardness testing machine
B.1.1 Calibration of the test force
B.1.2 Depth-measuring system
B.1.3 Verification of the indenter
B.1.4 Verification of the test cycle
B.2 Indirect verification of the hardness testing machine
