Metallic materials - Knoop hardness test - Part 2: Verification and calibration of testing machines (ISO 4545-2:2017); German version EN ISO 4545-2:2018— 29 стр.
Metallic materials - Instrumented indentation test for hardness and materials parameters - Part 1: Test method (ISO 14577-1:2015); German version EN ISO 14577-1:2015— 54 стр.
Metallic materials - Knoop hardness test - Part 2: Verification and calibration of testing machines (ISO 4545-2:2005); German version EN ISO 4545-2:2005— 23 стр.
Metallic materials - Knoop hardness test - Part 2: Verification and calibration of testing machines (ISO 4545-2:2017); German version EN ISO 4545-2:2018— 29 стр.