Home / Standards / GB/T 21838.2-2022 GB/T 21838.2-2022 Active Metallic materials—Instrumented indentation test for hardness and materials parameters—Part 2: Verification and calibration of testing machines 金属材料 硬度和材料参数的仪器化压入试验 第2部分：试验机的检验和校准 Standard Type GBT ICS 19.060;77.040.10 CCS N71 Status 现行 Issue Date 2022-07-11 Implementation 2023-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A