Home / Standards / GB/T 40342-2021 GB/T 40342-2021 Active Method for determination of aluminum content in hot dipped zinc-aluminum alloy coating on steel wire 钢丝热镀锌铝合金镀层中铝含量的测定 Standard Type GBT ICS 77.140.65 CCS H12 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A