FERRITIC STAINLESS STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE IN DISSIMILAR WELD WITH AUSTENITIC STAINLESS STEEL, AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet in which sufficient corrosion resistance can be secured even regarding dissimilar welds with an austenitic stainless steel (e.g., SUS304).;SOLUTION: The ferritic stainless steel sheet has a composition comprising, by mass, ≤0.030% C, ≤0.030% N, ≤0.050% (C+N), ≤0.50% Si, ≤0.50% Mn, ≤0.10% Al, 20.5 to 22.5% Cr, 0.30 to 1.00% Cu, ≤1.50% Ni, 0.20 to 0.70% Nb, ≤0.040% P and ≤0.010% S, and in which these components satisfy the relations in inequality; (Cr+1.5Si+0.5Nb)≤23.0 and inequality; (Ni+30C+0.5Mn+0.5Cu+30N)≥0.90, and the balance Fe with inevitable impurities.;COPYRIGHT: (C)2008,JPO&INPIT