Patent ID: 6419878
Filing Date: 2002-07-16
Classification: C22C

Abstract:
A Feâ€”Cr alloy having excellent initial rust resistance, workability and weldability comprising a composition of:C: more than about 0.0025 mass % and less than about 0.03 mass %, N: more than about 0.0025 mass % and less than about 0.03 mass %, Si: more than about 0.1 mass % and less than about 2.0 mass %, Mn: more than about 0.1 mass % and less than about 3.0 mass % Cr: more than about 8.0 mass % and less than about 15 mass %, Al: less than about 0.5 mass %, P: less than about 0.04 mass %, S: less than about 0.03 mass %, Ni: from about 0.01 mass % to about 3.0 mass %, Co: from about 0.01 mass % to about 0.5 mass %, V: from about 0.01 mass % to about 0.5 mass % and W: from about 0.001 mass % to about 0.05 mass %, and a X value in the following equation (1), satisfies: X&lE;11.0, the balance substantially being Fe and inevitable impurities: X value=Cr(mass %)+Mo(mass %)+1.5 Si(mass %)+0.5 Nb(mass %)+0.2V(mass %)+0.3W(mass %) +8 Al(mass %)âˆ’Ni(mass %)âˆ’0.6 Co(mass %)âˆ’0.5 Mn(mass %)âˆ’30 C(mass %)âˆ’30 N(mass %)âˆ’0.5Cu(mass %)â€ƒâ€ƒ(1).