GB/T 5293-2018 埋弧焊用非合金钢及细晶粒钢实心焊丝、药芯焊丝和焊丝-焊剂组合分类要求
Defines the technical delivery conditions for welded tubes of circular cross-section, made of non-alloy quality steel with specified room temperature properties.
DIN 8557 T.1-1981 埋弧焊填充金属丝.合金钢以及非合金钢的连接焊.标记.交货技术条件
