Two Phase Stainless Steel Material And Two Phase Stainless Steel Welded Joint

Abstract: Provided is a two-phase stainless steel material in which the strength of a weld metal produced by non-filler welding using a shielding gas that does not contain nitrogen is comparable to or greater than that of a base material portion. A two-phase stainless steel material according to the present disclosure contains, in mass%, 0.001-0.030% of C, 1.00% or less of Si, 0.05-5.00% of Mn, 0.035% or less of P, 0.0008% or less of S, 21.00-28.00% of Cr, 4.00-9.50% of Ni, 0.80-5.50% of Mo, 0.01-3.50% of Cu, 0.001-0.050% of Al, 0.400% or less of N, 0.0001-0.0050% of B, 0.0050% or less of Mg, 0.0005-0.0100% of Ca, 0.002-0.100% of Ti, and 0.05-2.00% of Co, and satisfies formula (1) and formula (2). (1): Ca/S=2.00 (2): (1000×Ti+2×N)×Co0.2×(0.5×Ca/S)1.6=50.00

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