DIN 50157-2:2008 Metallic materials - Hardness testing with portable measuring instruments operating with mechanical penetration depth - Part 2: Verification and calibration of the testing devices
DIN 50157-1:2008 Metallic materials - Hardness testing with portable measuring instruments operating with mechanical penetration depth - Part 1: Test method
DIN EN ISO 376 Metallic materials - Calibration of force-proving instruments used for the verification of uniaxial testing machines (ISO 376:2011); German version EN ISO 376:2011 / Note: DIN EN ISO 376 (2005-02) remains valid alongside this standard until 2011-12-31.*, 2011-09-01 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 50157-2:2008 history
2020DIN 50157-2:2020 Metallic materials - Hardness testing with portable measuring devices operating with mechanical penetration depth - Part 2: Verification and calibration of the testing devices
2008DIN 50157-2:2008 Metallic materials - Hardness testing with portable measuring instruments operating with mechanical penetration depth - Part 2: Verification and calibration of the testing devices