Home / Standards / GB/T 230.2-2022 GB/T 230.2-2022 Active Metallic materials—Rockwell hardness test—Part 2: Verification and calibration of testing machines and indenters 金属材料 洛氏硬度试验 第2部分:硬度计及压头的检验与校准 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