Home / Standards / GB/T 38751-2020 GB/T 38751-2020 Active General rules of hardness test for heat treated parts 热处理件硬度检验通则 Standard Type GBT ICS 25.200 CCS J36 Status 现行 Issue Date 2020-04-28 Implementation 2020-11-01 Responsible Dept 国家标准委 Drafting Unit N/A