Home / Standards / GB/T 40321-2021 GB/T 40321-2021 Active High strength and toughness Al-Zn-Mg-Cu series aluminium alloy plate 高强高韧型Al-Zn-Mg-Cu系铝合金板材 Standard Type GBT ICS 77.150.10 CCS H61 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A