Ar-CO2 mixed gas Shielded arc welding flux cored wire

摘要

A wire including, in terms of % by mass with respect to a total mass of the wire, as a total in a steel outer skin and a flux, 0.03 to 0.08% of C, 0.1 to 0.6% of Si, 1.2 to 2.5% of Mn, 0.01 to 0.5% of Cu, 0.5 to 1.5% of Ni, 0.05 to 0.5% of Ti, 0.002 to 0.015% of B, and 0.05% or less of Al, and further including, in the flux, 4 to 8% in terms of TiO 2 , 0.1 to 0.6% of in terms of SiO 2 , 0.02 to 0.3% in terms of Al 2 O 3 , 0.1 to 0.8% of Mg, 0.05 to 0.3% in terms of F, 0.05 to 0.3% in terms of Na and K in a fluorine compound, 0.05 to 0.2% of Na 2 O and K 2 O, and 0.2% or less in terms of ZrO 2 .