Home / Standards / GB/T 41979.4-2022 GB/T 41979.4-2022 Active Friction stir spot welding—Aluminium and its alloys—Part 4：Specification and qualification of welding procedures 搅拌摩擦点焊 铝及铝合金 第4部分:焊接工艺规程及评定 Standard Type GBT ICS 25.160.10 CCS J33 Status 现行 Issue Date 2022-10-12 Implementation 2022-10-12 Responsible Dept 国家标准委 Drafting Unit N/A