Home / Standards / GBT 4340.4-2022 GBT 4340.4-2022 Metallic materials — Vickers hardness test — Part 4: Tables of hardness values 金属材料 维氏硬度试验 第4部分:硬度值表 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A