| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet having no problem in hot workability and capable of securely providing excellent crevice corrosion resistance. SOLUTION: The ferritic stainless steel sheet having excellent crevice corrosion resistance has a componential composition comprising, by mass,≤0.05% C, 0.02 to 1.0% Si,≤0.5% Mn,≤0.04% P,≤0.02% S,≤0.1% Al, 20 to 25% Cr, 0.3 to 1.0% Cu, 0.1 to 3.0% Ni, 0.2 to 0.6% Nb and≤0.05% N, and the balance Fe with inevitable impurities, and the ferritic stainless steel sheet has structure where Nb carbonitrides having a size of≤5μm are present, and the ferritic stainless steel sheet has a surface roughness Ra of≤0.4μm. COPYRIGHT: (C)2009,JPO&INPIT
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