Unalloyed wire electrode for GMA (MIG/MAG) welding of unalloyed steels using CO? or mixed gases, depending on the thickness of the base metal. Characterized by reduced slag formation and a smooth welding deposit. Particularly suitable for welding galvanized and pre-painted steels, as well as for welding unalloyed steels in pipelines, boilers, and tank construction. Also suitable for welding thin metal plates and performing repair welds. A thin and homogeneous copper coating increases electrical conductivity and protects the wire from wear.