Deep drawing Characteristic, resistance secondary process brittleness and the ferrite stainless steel plate and its production manner null C which are superior

摘要

PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet which is provided with deep drawability and secondary working brittleness resistance, and has excellent coating suitability and corrosion resistance as well, and to provide a production method therefor.;SOLUTION: In the final cold rolled sheet of a ferritic stainless steel sheet having a composition containing, by mass, ≤0.01% C, ≤1.0% Si, ≤1.5% Mn, 11 to 23% Cr, ≤0.06% P, ≤0.03% S, ≤1.0% Al, ≤0.04% N, 0.0005 to 0.01% B, ≤0.3% V, ≤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, a mean crystal grain size is controlled to ≤40 μm, and a surface roughness Ra is controlled to ≤0.3 μm.;COPYRIGHT: (C)2003,JPO