Home / Standards / GB/T 27552-2021 GB/T 27552-2021 Active Destructive tests on welds in metallic materials—Microhardness testing of welded joints 金属材料焊缝破坏性试验 焊接接头显微硬度试验 Standard Type GBT ICS 25.160.40 CCS J33 Status 现行 Issue Date 2021-10-11 Implementation 2022-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A