Austenitic stainless steel sheet

Abstract

This austenitic stainless steel sheet contains, as a chemical composition, by mass %, C: 0.030% or less, Si: 1.0% or less, Mn: 1.5% or less, Cr: 15.0% or more and 20.0% or less, Ni: 6.5% or more and 9.0% or less, N: 0.030% or more and 0.150% or less, any one of Nb, V, and Ti or two or more thereof in total: 0.030% or more and 0.300% or less, Mo: 0% or more and 2.0% or less, Cu: 0% or more and 1.5% or less, Co: 0% or more and 1.0% or less, P: 0.10% or less, S: 0.010% or less, and Al: 0.10% or less, in which a remainder includes Fe and impurities, the average grain size is 5.0 μm or less, and the non-recrystallization rate is more than 3% and 20% or less.

1 . An austenitic stainless steel sheet comprising,
 as a chemical composition, by mass %:   C: 0.030% or less;   Si: 1.0% or less;   Mn: 1.5% or less;   Cr: 15.0% or more and 20.0% or less;   Ni: 6.5% or more and 9.0% or less;   N: 0.030% or more and 0.150% or less;   any one of Nb, V, and Ti or two or more thereof in total: 0.030% or more and 0.300% or less;   Mo: 0% or more and 2.0% or less;   Cu: 0% or more and 1.5% or less;   Co: 0% or more and 1.0% or less;   Ca, Mg, Zr, Sn, Pb, and W in total: 0% or more and 0.10% or less;   P: 0.10% or less;   S: 0.010% or less; and   Al: 0.10% or less,   wherein a remainder includes Fe and impurities,   an average grain size is 5.0 μm or less, and   a non-recrystallization rate is more than 3% and 20% or less.   
     
     
         2 . The austenitic stainless steel sheet according to  claim 1 , comprising, in the chemical composition, by mass %, one or more of:
 Cu: 0.1% to 1.5%;   Mo: 0.1% to 2.0%; and   Co: 0.1% to 1.0%.