PURPOSE:To obtain the titled two-phase stainless steel by specifying the contents of C, Si, Mn, Cr, Ni, Cu, N, W, V, Ta, Ti and Zr and the value of Ni bal. CONSTITUTION:This two-phase stainless steel is a ferritic-austenitic stainless steel consisting of, by weight, =0.05% C, 1-5% Si, 3-10% Mn, 17-22% Cr, 1-7% Ni, 0.5-3% Cu, 0.04-0.20% N and the balance Fe or further contg. 0.5-3% Mo and one or more among 0.05-1.00% each of W, V, Ta, Ti and Zr and having -12--6 Ni bal represented by the formula. The steel has satisfactory strength and elongation necessary for a material for vehicles without carrying out temper rolling. The steel also has a high Young's modulus and superior corrosion resistance and undergoes no deterioration in the strength of the weld zone.
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