Ferritic stainless steel sheet

Abstract

Provided is a ferritic stainless steel sheet having excellent corrosion resistance and workability equal to or better than SUH409L. The ferritic stainless steel sheet contains 0.025% or less C, 0.01% to 1.00% Si, 0.05% to 1.00% Mn, 0.020% to 0.040% P, 0.030% or less S, 0.001% to 0.100% Al, 12.5% to 14.4% Cr, 0.01% to 0.80% Ni, 0.11% to 0.40% Ti, 0.010% to 0.100% Nb, and 0.020% or less N by mass %, the remainder being Fe and inevitable impurities.

1 . A ferritic stainless steel sheet Comprising, by mass %:
 0.025% or less C;   0.01% to 1.00% Si;   0.05% to 1.00% Mn;   0.020% to 0.040% P;   0.030% or less S;   0.001% to 0.100% Al;   12.5% to 14.4% Cr;   0.01% to 0.80% Ni;   0.11% to to 0.40% Ti;   0.010% to 0.100% Nb;   0.020% or less N; and   the remainder being Fe and inevitable impurities.   
     
     
         2 . The ferritic stainless steel sheet according to  claim 1 , wherein the content of Ti and the content of Nb satisfy the following Inequality (1):
   0.10≦Nb/Ti≦0.30   (1)
   
       where Nb and Ti represent the content of each respective element. 
     
     
         3 . The ferritic stainless steel sheet according to further comprising at least one group selected from the following groups:
 Group A: one or more element selected from the group consisting of, by mass %, 0.01% to 0.30% Mo, 0.01% to 0.50% Cu, 0.01% to 0.50% Co, and 0.01% to 0.50% W,   Group B: one or more element selected from the group consisting of, by mass %, 0.01% to (125% V, 0.01% to 0.30% Zr, 0.0003% to 0.0030% B, 0.0005% to 0.0030% Mg, 0.0003% to 0.0030% Ca, 0.001% to 0.20% Y, and 0.001% to 0.10% of a REM, and   Group C: one or more element selected from the group consisting of, by mass %, 0.001.% to 0.50% Sn and 0.001% to 0.530% Sb.   
     
     
         4 . The ferritic stainless steel sheet according  claim 2 , further comprising at lest one group selected from the following groups:
 Group A: one or more element selected from the group consisting of, by mass % 0.01% to 0.30% Mo, 0.01% to 0.50% Cu, 0.01% to 0.50% Co, and 0.01% to 0.50% W,   Group B: one or more element selected from the group consisting of, by mass %, 0.01% to (125% V, 0.01% to 0.30% Zr, 0.0003% to 0.0030% B, 0.0005% to 0.0030% Mg, 0.0003% to 0.0030% Ca, 0.001% to 0.20% Y. and 0.001% to 0.10% of a REM, and   Group C: one or more element selected from the group consisting of, by mass %. 0.001.% to 0.50% Sn and 0.001% to 0.530% Sb.   
     
     
         5 . (canceled) 
     
     
         6 . The ferritic stainless steel sheet according to  claim 1 , further comprising, by mass %, 0.01% to 0.25% V,
 wherein the content of Ti, the content of Nb, and the content of V satisfy the following Inequality (1) and Inequality (2):
   0.10≦Nb/Ti≦0.30   (1)
 
   0.20≦V/(Ti+Nb)≦1.00   (2)
 
   where Ti, Nb and V represent the content of each respective element.   
     
     
         7 . The ferritic stainless steel sheet according to  claim 2 , further comprising, by mass %, 0.01% to 0.25% V,
 wherein the content of Ti, the content of Nb, and the content of V satisfy the following Inequality (2):
   0.20≦V/(Ti+Nb)≦1.00   (2)
 
   where Ti, Nb and V represent the content of each respective element.   
     
     
         8 . The ferritic stainless steel sheet according to  claim 3 , further comprising, by mass %, 0.01% to 0.25% V,
 wherein the content of Ti, the content of Nb, and the content of V satisfy the following Inequality (1) and Inequality (2):
   0.10≦Nb/Ti≦0.30   (1)
 
   0.20≦V/(Ti+Nb)≦1.00   (2)
 
   where Ti, Nb and V represent the content of each respective element.   
     
     
         9 . The ferritic stainless steel sheet according to  claim 4 , further comprising, by mass %, 0.01% to 0.25% V,
 wherein the content of Ti, the content of Nb, and the content of V satisfy the following Inequality (2):
   0.20≦V/(Ti+Nb)≦1.00   (2)
 
   where Ti, Nb and V represent the content of each respective element.