Ferritic stainless steel with excellent brazeability

Abstract

This ferritic stainless steel with excellent brazeability includes, in terms of mass percent, 0.03% or less of C, 0.05% or less of N, 0.015% or more of C+N, 0.02 to 1.5% of Si, 0.02 to 2% of Mn, 10 to 22% of Cr, 0.03 to 1% of Nb, and 0.5% or less of Al, and further includes Ti in a content that satisfies the following formulae (1) and (2), with the remainder composed of Fe and unavoidable impurities. Ti—3N≦0.03  (1) 10(Ti—3N)+Al≦0.5  (2) (Here, the atomic symbols in formulae (1) and (2) indicate the content (mass %) of the respective element, and the numerical values that precede the atomic symbols are constants.)

1 . A ferritic stainless steel with excellent brazeability comprising, in terms of mass percent, 0.03% or less of C, 0.05% or less of N, 0.015% or more of C+N, 0.1 to 1.5% of Si, 0.02 to 2% of Mn, 13.15 to 22% of Cr, 0.03 to 1% of Nb, and 0.5% or less of Al, and further comprising Ti in a content that satisfies the following formulae (1) and (2), with the remainder composed of Fe and unavoidable impurities.
   Ti—3N≦0.03  (1)     10(Ti—3N)+Al≦0.5  (2)   
       (Here, the atomic symbols in formulae (1) and (2) indicate the content (mass %) of the respective element, and the numerical values that precede the atomic symbols are constants.) 
     
     
         2 . The ferritic stainless steel with excellent brazeability according to  claim 1 , which further comprises one or more selected from the group consisting of, in terms of mass %, 3% or less of Mo; 3% or less of Ni; 3% or less of Cu; 3% or less of V; and 5% or less of W. 
     
     
         3 . The ferritic stainless steel with excellent brazeability according to  claim 1  or  2 , which further comprises one or more selected from the group consisting of, in terms of mass %, 0.002% or less of Ca; 0.002% or less of Mg; and 0.005% or less of B.