STRUCTURAL STAINLESS STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE IN WELDED PART, AND METHOD FOR PRODUCING SAME

摘要

Disclosed are: a structural stainless steel sheet which can be highly efficiently produced at low cost and has excellent corrosion resistance in a welded part; and a method for producing the structural stainless steel sheet. Specifically disclosed is a structural stainless steel sheet which contains, in mass%, 0.01-0.03% of C, 0.01-0.03% of N, 0.01-0.40% of Si, 1.5-2.5% of Mn, 0.04% or less of P, 0.02% or less of S, 0.05-0.15% of Al, 10-13% of Cr, 0.5-1.0% of Ni, and 4 × (C + N) or more but 0.3% or less of Ti, while controlling V to 0.05% or less, Ca to 0.0030% or less and O to 0.0080% or less. The structural stainless steel sheet is further characterized in that the F value obtained by Cr + 2 × Si + 4 × Ti - 2 × Ni - Mn - 30 × (C + N) is 11 or less, the FFV value obtained by Cr + 3 × Si + 16 × Ti + Mo + 2 × Al - 2 × Mn - 4 × (Ni + Cu) - 40 × (C + N) + 20 × V is 9.0 or less, and the balance of the structural stainless steel sheet is made up of Fe and unavoidable impurities.