Ferritic stainless steel

Abstract

The ferritic stainless steel has a chemical composition containing, by mass %, C: 0.003% or more and 0.012% or less, Si: 0.30% or more and 0.60% or less, Mn: 0.10% or more and 0.35% or less, P: 0.040% or less, S: 0.020% or less, Cr: 17.0% or more and 19.0% or less, Ni: more than 0.10% and 0.30% or less, Ti: 0.10% or more and 0.40% or less, Nb: 0.005% or more and less than 0.050%, Mo: 0.20% or less, N: 0.005% or more and 0.015% or less, Cu: 0.3% or more and 0.5% or less, Mg: less than 0.0005%, and the balance being Fe and inevitable impurities.

1 . Ferritic stainless steel having a chemical composition containing, by mass %, C: 0.003% or more and 0.012% or less, Si: 0.30% or more and 0.60% or less, Mn: 0.10% or more and 0.35% or less, P: 0.040% or less, S: 0.020% or less, Cr: 17.0% or more and 19.0% or less, Ni: more than 0.10% and 0.30% or less, Ti: 0.10% or more and 0.40% or less, Nb: 0.005% or more and less than 0.050%, Mo: 0.20% or less, N: 0.005% or more and 0.015% or less, Cu: 0.3% or more and 0.5% or less, Mg: less than 0.0005%, and the balance being Fe and inevitable impurities. 
     
     
         2 . The ferritic stainless steel according to  claim 1 , the steel having the chemical composition further containing, by mass %, Al: 0.01% or more and 0.5% or less. 
     
     
         3 . The ferritic stainless steel according to  claim 1  or  2 , the steel having the chemical composition further containing, by mass %, Sb: 0.05% or more and 0.30% or less. 
     
     
         4 . The ferritic stainless steel according to  claim 1 , the steel having the chemical composition further containing, by mass %, one or two of Zr: 0.01% or more and 0.60% or less and V: 0.01% or more and 0.50% or less. 
     
     
         5 . The Ferritic stainless steel according to  claim 3 , the steel having the chemical composition further containing, by mass %, one or two of Zr: 0.01% or more and 0.60% or less and V: 0.01% or more and 0.50% or less. 
     
     
         6 . The ferritic stainless steel according to  claim 2 , the steel having the chemical composition further containing, by mass %, Sb: 0.05% or more and 0.30% or less. 
     
     
         7 . The ferritic stainless steel according to  claim 2 , the steel having the chemical composition further containing, by mass %, one or two of Zr: 0.01% or more and 0.60% or less and V: 0.01% or more and 0.50% or less.