DIN EN ISO 4545-4:2018-05 Metallic materials - Knoop hardness test - Part 4: Table of hardness values (ISO 4545-4:2017); German version EN ISO 4545-4:2018
2018DIN EN ISO 4545-4:2018-05 Metallic materials - Knoop hardness test - Part 4: Table of hardness values (ISO 4545-4:2017); German version EN ISO 4545-4:2018
2018DIN EN ISO 4545-4:2018 Metallic materials - Knoop hardness test - Part 4: Table of hardness values (ISO 4545-4:2017); German version EN ISO 4545-4:2018
2006DIN EN ISO 4545-4:2006 Metallic materials - Knoop hardness test - Part 4: Table of hardness values (ISO 4545-4:2005); English version of DIN EN ISO 4545-4:2006-03