Home / Standards / GB/T 3771-1983 GB/T 3771-1983 Active Conversion of hardness and strength for copper alloys 铜合金硬度与强度换算值 Standard Type GBT ICS 77.040.10 CCS H22 Status 现行 Issue Date 1983-06-22 Implementation 1984-04-01 Responsible Dept 国家标准委 Drafting Unit N/A