| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet which has a high r value, therefore has excellent deep drawability, and has excellent roughening resistance of the surface as well. SOLUTION: The steel sheet has a composition containing, by mass, <=0.1% C, <=1.0% Si, <=1.5% Mn, 11 to 23% Cr, <=2.0% Ni, <=1.0% Al, <=0.06% P, <=0.03% S and <=0.04% N, and further containing <=0.8% Nb and/or <=1.0% Ti so as to satisfy 18<=Nb/(C+N)+2(Ti/(C+N))<=60, and has a crystal grain diameter of <=50μm and a mean r value of >=2.0, and satisfies (tensile strength (MPa)×the mean r value)/(the crystal grain diameter (μm))>=20.
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