Patent ID: 8721960

Claim:
A ferritic stainless steel comprising, by mass %, C: 0.001 to 0.02%, Si: 0.01 to 0.6%, Mn: 0.01 to 0.6%, P: 0.005 to 0.04%, S: 0.0001 to 0.01%, Cr: 13 to 22%, N: 0.001 to 0.02%, Al: 0.005 to 0.05%, Sn: 0.001 to 1%, Nb: 0.05 to 0.7%, Ti: 0.05 to 0.35%, Mo: 0.005 to 0.5%, and a balance of Fe and unavoidable impurities, said steel characterized by satisfying the two relations of the following formula (1) and formula (2), where I(Fe), I(Cr), I(Sn), and I(O) are the X-ray intensity of the Fe oxides, the X-ray intensity of Cr oxides, the X-ray intensity of Sn oxides, and the sum of X-ray intensities of oxides other than Fe oxides, Cr oxides, and Sn oxides, respectively, at the steel surface measured by an X-ray photoelectron spectrometer: 0<I(Fe)/I(Cr)<5 formula (1) and 0<I(O)/I(Sn)<3 formula (2).