CO2气体保护焊丝 CO2气体保护焊丝系列 CO2 GAS SHIELDED WELDING WIRE 国标型号 GB Standar 相当于 AWS Correspond to AWS 主要用途 Maine Purpose ER49-1 焊接低碳钢及某些低合钢结构。 For welding structures of middle carbon steels and low-alloy steels. ER50-3 ER70S-3 用于碳素钢及低合金钢的焊接。 For welding of carbon steels and low-alloy steels. ER50-6 ER70S-G 用于碳钢及500MPa级高强钢的车辆、建筑、造船、桥梁等结构的焊接。 For welding of carbon steels and 500Mpa high strength steels, used in car, building, ship-building and bridge. ER50-G ER70S-G 用于高速焊接、尤其适宜于薄板焊接。 For high speed welding for thin plates.