ISO 16859-1 Metallic materials - Leeb hardness test - Part 1: Test method
ISO 16859-3 Metallic materials - Leeb hardness test - Part 3: Calibration of reference test blocks
ISO 6507-1 Metallic materials — Vickers hardness test — Part 1: Test method*, 2023-08-01 Update
ISO/IEC Guide 98-3 Uncertainty of measurement - Guide to the expression of uncertainty in measurement (GUM:1995). Extension to any number of output quantities
BS EN ISO 16859-2:2015 history
2015BS EN ISO 16859-2:2015 Metallic materials. Leeb hardness test. Verification and calibration of the testing devices