| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet excellent in dictility in both of the rolling and width direction. SOLUTION: This ferritic stainless steel sheet excellent in ductility has a composition containing, by mass, 0.0005 to 0.03% C, 0.01 to 1% Si, 0.01 to 1% Mn, <0.04% P, 0.0001 to 0.01% S, 10 to 25% Cr, 0.01 to 0.8% Ti, 0.005 to 0.1% Al, 0.0005 to 0.03% N and 0.0005 to 0.01% Mg, also, in which Mg inclusions with the maximum size of 0.05 to 2μm and Ti4C2S2 with the maximum size of 0.5 to 2μm are dispersed into the steel at a density of >=3 pieces/mm2 in both cases, and further, the elongation EL of the formed product satisfies the following inequality in both directions of the rolling direction and the width direction: EL>=37-0.3×[Cr]+2.8×t, wherein [Cr]: the Cr content (mass %), and (t): the sheet thickness (mm) of the formed product.
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