Home / Standards / GB/T 42400-2023 GB/T 42400-2023 Active Hardness test methods on metal parts repaired by laser cladding 激光熔覆修复金属零部件硬度试验方法 Standard Type GBT ICS 77.040.10 CCS H22 Status 现行 Issue Date 2023-03-17 Implementation 2023-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A