ISO 6507-2:2018
Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing machines
ISO 6507-2:2018 specifies a method of verification and calibration of testing machines and diagonal measuring system for determining Vickers hardness in accordance with ISO 6507‑1.
A direct method of verification and calibration is specified for the testing machine, indenter and the diagonal length measuring system. An indirect verification method using reference blocks is specified for the overall checking of the machine.
If a testing machine is also to be used for other methods of hardness testing, it shall be verified independently for each method.
ISO 6507-2:2018 is also applicable to portable hardness testing machines but not applicable to hardness testing machines based on different measurement principles, e.g. ultrasonic impedance method.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General conditions
5 Direct verification
5.1 General
5.2 Calibration of the test force
5.3 Verification of the indenter
5.4 Calibration and verification of the diagonal measuring system
5.5 Verification of the testing cycle
5.6 Uncertainty of calibration/verification
6 Indirect verification
6.1 General
6.2 Test force and hardness levels
6.3 Measurement of reference indentation
6.4 Number of indentations
6.5 Verification result
6.6 Repeatability
6.7 Bias
6.8 Uncertainty of calibration/verification
7 Intervals between verifications
8 Verification report/calibration certificate
8.1 Vickers testing machine
8.2 Vickers indenter
Annex A (informative) Uncertainty of the calibration results of the hardness testing system
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General conditions
5 Direct verification
5.1 General
5.2 Calibration of the test force
5.3 Verification of the indenter
5.4 Calibration and verification of the diagonal measuring system
5.5 Verification of the testing cycle
5.6 Uncertainty of calibration/verification
6 Indirect verification
6.1 General
6.2 Test force and hardness levels
6.3 Measurement of reference indentation
6.4 Number of indentations
6.5 Verification result
6.6 Repeatability
6.7 Bias
6.8 Uncertainty of calibration/verification
7 Intervals between verifications
8 Verification report/calibration certificate
8.1 Vickers testing machine
8.2 Vickers indenter
Annex A (informative) Uncertainty of the calibration results of the hardness testing system
Bibliography