Patent ID: 8465604

Claim:
A ferritic stainless steel sheet having excellent corrosion resistance consisting of: C of 0.03% or less, Si of 1.0% or less, Mn of 0.5% or less, P of 0.04% or less, S of 0.02% or less, Al of 0.1% or less, Cr of 20.5% to 22.5%, Cu of 0.3% to 0.8%, Ni of 1.0% or less, Ti of 4×(C %+N %) to 0.35%, Nb of less than 0.01%, N of 0.03% or less, optionally at least one of 0.0002 to 0.002% of B, 0.01 to 0.5% of V or 0.01 to 0.5% of Zr, and C+N of 0.05% or less, and the remainder of the steel sheet being Fe and inevitable impurities; wherein the following equation (1) is satisfied, 240+35×(Cr %−20.5)+280×{Ti %−4×(C %+N %)}≧280 (1), wherein C %, N %, Cr % and Ti % indicate the content (mass percent) of C, N, Cr and Ti, respectively, and the steel sheet has a pitting potential equivalent of 280 or more.