Abstract: A flux-cored wire with a steel sheath filled with flux, including based on a total mass of the wire, C: 0.026% to 0.060% by mass, Si: more than 0% to 0.50% by mass, Mn: 1.3% to 2.8% by mass, Cu: 0.20% to 1.50% by mass, Ni: 0.45% to 1.00% by mass, Mo: 0.15% to 0.65% by mass, Mg: 0.30% to 0.65% by mass, and B: 0.001% to 0.010% by mass. Provided that Cr: 0.10% by mass or less and Al: 0.10% by mass or less. A Nb content [Nb] of the wire expressed in % by mass based on the total mass of the wire and a V content [V] of the wire expressed in % by mass based on the total mass of the wire satisfy [Nb]+[V]=0.015 or less.

Abstract: This welded metal contains C, Si, Mn, Ni, Cr, Mo, Ti, B, O, N and Nb+V in specific amounts, respectively, with the balance being made up of Fe and unavoidable impurities. In this welded metal, carbides having circle-equivalent diameters of less than 0.40 ?m have an average circle-equivalent diameter of 0.10 ?m or more, and intergranular carbides having circle-equivalent diameters of 0.40 ?m or more have an average circle-equivalent diameter of 0.75 ?m or less.