Home / Standards / GB/T 3849.2-2010 GB/T 3849.2-2010 Active Hardmetals - Rockwell hardness test (scale A) - Part 2: Preparation and calibration of standard test blocks 硬质合金 洛氏硬度试验(A标尺) 第2部分:标准试块的制备和校准 Standard Type GBT ICS 77.160 CCS H16 Status 现行 Issue Date 2011-01-14 Implementation 2011-11-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A