Ferritic stainless steel excellent in heat resistance and workability sheet

Abstract

Ferritic stainless steel excellent in heat resistance and workability which contains, by mass %, C: 0.02% or less, N: 0.02% or less, Si: 2% or less, Mn: 2% or less, Cr: 10 to 20%, Cu: 0.4 to 3%, Ti: 0.01 to 0.5%, and B: 0.0002 to 0.0030% and has a balance of Fe and unavoidable impurities.

1 . Ferritic stainless steel excellent in heat resistance and workability which contains, by mass %,
 C: 0.02% or less,   N: 0.02% or less,   Si: 2% or less,   Mn: 2% or less,   Cr: 10 to 20%,   Cu: 0.4 to 3%,   Ti: 0.01 to 0.5%, and   B: 0.0002 to 0.0030% and   
       has a balance of Fe and unavoidable impurities. 
     
     
         2 . Ferritic stainless steel excellent in heat resistance and workability as set forth in  claim 1  which, further contains, by mass %, one or more of:
 Nb: 0.01 to 0.3%, 
 Mo: 0.01 to 0.3%, 
 Al: 2.5% or less, 
 V: 1% or less, 
 Zr: 1% or less, and 
 Sn: 1% or less. 
 
     
     
         3 . Method of production of ferritic stainless steel excellent in heat resistance and workability
 characterized by hot rolling ferritic stainless steel which has a composition of ingredients of  claim 1  or  2  so as to obtain a hot rolled sheet, then, omitting annealing of the hot rolled sheet, pickling the hot rolled sheet, cold rolling it by rolling rolls of a diameter of 400 mm or more, then performing final annealing.