Home / Standards / GB/T 5231-2022 GB/T 5231-2022 Active Designation and chemical composition of wrought copper and copper alloys 加工铜及铜合金牌号和化学成分 Standard Type GBT ICS 77.120.30 CCS H62 Status 现行 Issue Date 2022-03-09 Implementation 2022-10-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A