Metallic materials - Hardness testing with portable measuring instruments operating with electrical penetration depth - Part 2: Verification and calibration of the testing devices— 12 стр.
Metallic materials - Vickers hardness test - Part 2: Verification and calibration of testing machines (ISO 6507-2:2005); German version EN ISO 6507-2:2005— 25 стр.
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); German version EN ISO 6508-2:2005— 27 стр.
Metallic materials - Hardness testing with portable measuring instruments operating with electrical penetration depth - Part 2: Verification and calibration of the testing devices— 12 стр.