| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot rolled and annealed steel sheet which is suitable as the stock for a ferritic stainless steel cold rolled steel sheet having excellent ridging behavior and deep drawability, and to provide a production method therefor. SOLUTION: A steel slab having a composition containing, by mass, <=0.01% C, <=1.0% Si, <=1.5% Mn, 11 to 30% Cr, <=3.0% Mo, <=0.06% P, <=0.03% S, <=1.0% Al, <=0.04% N, <=0.8% Nb and/or <=1.0% Ti, and 18<=Nb/(C+N)+2(Ti/(C+N))<=60, and the balance Fe with inevitable impurities is hot-rolled. Next, the steel sheet is subjected to hot rolled sheet annealing for one or two times where its recrystallization ratio is controlled in >=95%, and the aspect ratio (the length in the sheet thickness direction/the length in the rolling direction) of the crystal grain size in the cross-section in the rolling direction is controlled in <=0.8.
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