Abstract: A Ni-based alloy wire for submerged arc welding according to an aspect of the present invention includes, as a chemical composition, by mass %, C: 0.001% to 0.060%, Si: 0.01% to 3.00%, Mn: 0.01% to 6.00%, Mo: 15.0% to 25.0%, W: 2.5% to 10.0%, Ta: 0.002% to 0.100%, Ni: 65.0% to 82.4%, Al: 0% to 2.00%, Ti: 0% to 2.00%, Cu: 0% to 1.0%, P: 0% to 0.0200%, S: 0% to 0.0200%, N: 0% to 0.1000%, O: 0% to 0.0100%, Fe: 0% to 10.0000%, Co: 0% to 0.1000%, Cr: 0% to 1.0000%, V: 0% to 0.1000%, Nb: 0% to 0.1000%, B: 0% to 0.0100%, Bi: 0% to 0.0100%, Ca: 0% to 0.0200%, REM: 0% to 0.0300%, Zr: 0% to 0.1000%, and a remainder: impurities; in which a value X is 0.010% to 0.180%.

Abstract: A Ni-based alloy core wire for a covered electrode according to an aspect of the invention includes, as a chemical composition, by mass %: C: 0.0100% to 0.0800%; Si: 0.010% to 0.800%; Mn: 0.010% to 1.800%; Mo: 15.0% to 28.0%; W: 2.5% to 8.0%; Cu: 0.10% to 1.20%; Ta: 0.002% to 0.120%; Ni: 65.0% to 82.3%; and a remainder: impurities with other optional selective elements; in which a value X is 0.010% to 0.160%.

Abstract: A Ni-based alloy core wire for a covered electrode according to an aspect of the invention includes, as a chemical composition, by mass %: C: 0.0100% to 0.0800%; Si: 0.010% to 0.800%; Mn: 0.010% to 1.800%; Mo: 15.0% to 28.0%; W: 2.5% to 8.0%; Cu: 0.10% to 1.20%; Ta: 0.002% to 0.120%; Ni: 65.0% to 82.3%; and a remainder: impurities with other optional selective elements; in which a value X is 0.010% to 0.160%.

Abstract: A Ni-based alloy wire for submerged arc welding according to an aspect of the present invention includes, as a chemical composition, by mass %, C: 0.001% to 0.060%, Si: 0.01% to 3.00%, Mn: 0.01% to 6.00%, Mo: 15.0% to 25.0%, W: 2.5% to 10.0%, Ta: 0.002% to 0.100%, Ni: 65.0% to 82.4%, Al: 0% to 2.00%, Ti: 0% to 2.00%, Cu: 0% to 1.0%, P: 0% to 0.0200%, S: 0% to 0.0200%, N: 0% to 0.1000%, 0: 0% to 0.0100%, Fe: 0% to 10.0000%, Co: 0% to 0.1000%, Cr: 0% to 1.0000%, V: 0% to 0.1000%, Nb: 0% to 0.1000%, B: 0% to 0.0100%, Bi: 0% to 0.0100%, Ca: 0% to 0.0200%, REM: 0% to 0.0300%, Zr: 0% to 0.1000%, and a remainder: impurities; in which a value X is 0.010% to 0.180%.

Abstract: The present invention provides flux cored wire for welding duplex stainless steel which refines the solidified crystal grains for obtaining weld metal superior in toughness and ductility, characterized by containing, as the chemical ingredients included in the steel sheath and flux, by mass % with respect to the mass of the wire as a whole, C: 0.001 to 0.1%, Si: 0.01 to 1.0%, Mn: 2.0 to 6.0%, Cr: 17.0 to 27.0%, Ni: 1.0 to 10.0%, Mo: 0.1 to 3.0%, Al: 0.002 to 0.05%, Mg: 0.0005 to 0.01%, Ti: 0.001 to 0.5%, and N: 0.10 to 0.30%, further limiting P to 0.03% or less and S to 0.01% or less, satisfying 0.73×Cr equivalents?Ni equivalents?4.0 and Ti (mass %)×N (mass %)?0.0004, and having a balance of iron and unavoidable impurities.

Abstract: The present invention provides flux cored wire for welding duplex stainless steel which refines the solidified crystal grains for obtaining weld metal superior in toughness and ductility, characterized by containing, as the chemical ingredients included in the steel sheath and flux, by mass % with respect to the mass of the wire as a whole, C: 0.001 to 0.1%, Si: 0.01 to 1.0%, Mn: 2.0 to 6.0%, Cr: 17.0 to 27.0%, Ni: 1.0 to 10.0%, Mo: 0.1 to 3.0%, Al: 0.002 to 0.05%, Mg: 0.0005 to 0.01%, Ti: 0.001 to 0.5%, and N: 0.10 to 0.30%, further limiting P to 0.03% or less and S to 0.01% or less, satisfying 0.73×Cr equivalents?Ni equivalents?4.0 and Ti(mass %)×N(mass %)?0.0004, and having a balance of iron and unavoidable impurities.