FLUX-CORED WIRE FOR GAS-SHIELDED ARC WELDING OF HIGH TENSILE STRENGTH STEEL

摘要

A flux-cored wire for gas shielded arc welding of a high tensile strength steel is provided to facilitate the welding work in all positions and prevent cracks from occurring in a welding bead. A flux-cored wire for gas shielded arc welding comprises flux. The flux contains, by mass relative to the total mass of the wire, 0.02 to 0.14 mass % C, 0.4 to 1.1 mass % Si, 0.8 to 3.0 mass % Mn, 0.2 to 3.1 mass % Ni, 0.2 % or less Ti, 0.1 to 4.0 mass% of a total amount of Cr and Mo, 5.0 to 7.2 % of a total amount of TiO2 and MgO, 2.0 % or less of a total amount of alkali metal fluoride, alkali metal oxide, alkaline earth metal fluoride, alkaline earth metal oxide, B, Al and Mg, 0.0150 % or less N, and unavoidable impurities and balance.