Patent ID: 8153055

Claim:
A ferritic stainless steel comprising: C at 0.015 mass % or less; Si at 0.4 to 1.0 mass %; Mn at 1.0 mass % or less; P at 0.040 mass % or less; S at 0.010 mass % or less; Cr at 16 to 23 mass %; Al at 0.2 to 1.0 mass %; N at 0.015 mass % or less; Cu at 1.0 to 2.5 mass %; Nb at 0.3 to 0.65 mass %; Ti at 0.5 mass % or less; Mo at 0.1 mass % or less; and W at 0.1 mass % or less, the Si and the Al satisfying a relation Si (mass %) Al (mass %); and Fe and unavoidable impurities as the balance.