Home / Standards / GB/T 33911-2017 GB/T 33911-2017 Active 4XXX aluminum alloy columniform ingots 4XXX系铝合金圆铸锭 Standard Type GBT ICS 77.150.10 CCS H61 Status 现行 Issue Date 2017-07-12 Implementation 2018-06-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A