Home / Standards / GB/T 5231-2012 GB/T 5231-2012 Abolished 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 77.150.30 CCS H62 Status 废止 Issue Date 2012-12-31 Implementation 2013-10-01 Responsible Dept 中国有色金属工业协会 Drafting Unit 中国有色金属工业协会