This specification relates to the determination of the Vickers hardness of metallic materials with applied forces between 1 kgf and 120 kgf. Part B is covered by the validation of the Vickers hardness testing equipment. Additionally, section C talks about the standard test block calibration. All requirements are available from ASTM International.

This standard covers two classes of standardized tests: the Routine test (with routine accuracy) and the Verification, Laboratory, or Referee test (with a much higher degree of accuracy required). WMT&R specializes in the Referee Test.

In the Vickers Hardness Test, a small diamond indenter with an apical angle of 136 degrees is employed and is driven into the test material at a specific load. The resulting indentation is then measured from tip to tip along both axes. The average of the two axis readings is converted into a Vickers Hardness number using a formula, or more typically, a chart based on the formula. The test will yield the most accurate results if the specimen is subjected to the maximum load possible. A higher load results in a larger indentation, better measurement resolution, and more trustworthy data.

NextGen’s Macro Vickers Hardness Tester – Analogue, Digital and Digital with CCD Optical Analysis Software implements ASTM E92 Standard.

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