FERRITIC STAINLESS STEEL SHEET EXCELLENT IN FORMABILITY AND METHOD FOR PRODUCTION THEREOF

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A ferritic stainless steel sheet excellent in formability, which contains, in mass %%, C : 0.001 to 0.010 %%, Si : 0.01 to 1.0 %%, Mn : 0.01 to 1.0 %%, P : 0.01 to 0.04 %%, Cr : 10 to 20 %%, N : 0.001 to 0.020 %%, Nb : 0.3 to 1.0 %%, Mo : 0.5 to 2.0 %%, and contains precipitates in a total amount of 0.05 to 0.60 mass %%; and a method for producing the above ferritic stainless steel sheet, wherein a material for cold rolling is so prepared as to contain Nb based precipitates having a diameter of 0.1 to 1 μm in an amount of 0.15 to 0.6 vol %% and/or to contain re-crystallized grains having a diameter of 1 to 40 μm in a recrystallization proportion of 10 to 90 %%, and subsequently the material is subjected to cold rolling and then is annealed at 1010 to 1080°C. © KIPO & WIPO 2007