GOST R 8.695-2009 State system for ensuring the uniformity of measurements. Metals and alloys. Vickers hardness test. Part 2. Verification and calibration of testing machines
ISO 6507-3:2005 Metallic materials - Vickers hardness test - Part 3: Calibration of reference blocks
GOST R 8.695-2009 history
2009GOST R 8.695-2009 State system for ensuring the uniformity of measurements. Metals and alloys. Vickers hardness test. Part 2. Verification and calibration of testing machines