DIN 50158-1:2008 Metallic materials - Hardness testing with portable measuring instruments operating with electrical penetration depth - Part 1: Test method
DIN 50158-2:2008 Metallic materials - Hardness testing with portable measuring instruments operating with electrical penetration depth - Part 2: Verification and calibration of the testing devices
DIN EN ISO 6507-2:2006 Metallic materials - Vickers hardness test - Part 2: Verification and calibration of testing machines (ISO 6507-2:2005); English version of DIN EN ISO 6507-2:2006-03
DIN EN ISO 6507-3 Metallic materials - Vickers hardness test - Part 3: Calibration of reference blocks (ISO 6507-3:2018); German version EN ISO 6507-3:2018*, 2018-07-01 Update
DIN EN ISO 6508-2:2006 Metallic materials - Rockwell hardness test - Part 2: Verification and calibration of testing machines (scales A, B, C, D, E, F, G, H, K, N, T) (ISO 6508-2:2005); English version of DIN EN ISO 6508-2:2006-03
DIN 50158-1:2008 history
2008DIN 50158-1:2008-07 Metallic materials - Hardness testing with portable measuring instruments operating with electrical penetration depth - Part 1: Test method
2008DIN 50158-1:2008 Metallic materials - Hardness testing with portable measuring instruments operating with electrical penetration depth - Part 1: Test method