| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferritic stainless steel sheet for a water heater, the ferritic stainless steel assuring low height of burr occurring when the ferritic stainless steel sheet is subjected to blanking, that is, being excellent in blanking property, and to provide a production method therefor. SOLUTION: The ferritic stainless steel sheet excellent in the blanking property for the water heater has the composition comprising by mass% 0.0030-0.012% C, 0.20-0.50% Si,≤0.25% Mn,≤0.04% P,≤0.005% S, 0.02-0.06% Al, 0.0030-0.012% N, 21.0-25.0% Cr, 0.5-1.3% Mo, 0.3-0.5% Nb, 0.02-0.15% Ti and the balance Fe with inevitable impurities, and the ferritic stainless steel sheet is characterized in that ferritic grain diameter is≤25μm, complex carbonitride (Nb, Tb)(C, N) having a composition ratio of Nb to Ti [Nb]/[Ti] of 1-10 precipitates in the ferritic grain boundary, and a yield ratio is≥0.65. COPYRIGHT: (C)2009,JPO&INPIT
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