Austenitic stainless steel

Abstract

This austenitic stainless steel contains, in terms of % by mass: C: 0.100% or less, Si: 3.00% or less, Mn: 0.01% or more and 5.00% or less, P: 0.100% or less, S: 0.0050% or less, Ni: 7.00% or more and 38.00% or less, Cr: 17.00% or more and 28.00% or less, Mo: 10.00% or less, and N: more than 0.100% and 0.400% or less, with a remainder being Fe and impurities, and a brightness difference ΔL of a surface of a stainless steel is 5 or less.

1 . An austenitic stainless steel comprising, in terms of % by mass:
 C: 0.100% or less;   Si: 3.00% or less;   Mn: 0.01% or more and 5.00% or less;   P: 0.100% or less;   S: 0.0050% or less;   Ni: 7.00% or more and 38.00% or less;   Cr: 17.00% or more and 28.00% or less;   Mo: 10.00% or less; and   N: more than 0.100% and 0.400% or less,   with a remainder comprising Fe and impurities,   wherein a brightness difference ΔL of a surface of a steel sheet is 5 or less.   
     
     
         2 . The austenitic stainless steel according to  claim 1 , further comprising, instead of a part of Fe, in terms of % by mass, one or more selected from a group consisting of:
 Cu: 3.00% or less;   W: 2.00% or less; and   V: 1.00% or less.   
     
     
         3 . The austenitic stainless steel according to  claim 1 , further comprising, instead of a part of Fe, in terms of % by mass, one or more selected from a group of:
 Al: 0.001% or more and 0.3% or less;   Ca: 0.001% or more and 0.3% or less;   B: 0.0001% or more and 0.1% or less;   Ti: 0.001% or more and 0.40% or less;   Nb: 0.001% or more and 0.40% or less;   Sn: 0.001% or more and 0.5% or less;   Zr: 0.001% or more and 0.5% or less;   Co: 0.001% or more and 0.5% or less;   Mg: 0.001% or more and 0.5% or less;   Hf: 0.001% or more and 0.5% or less;   REM: 0.001% or more and 0.5% or less;   Ta: 0.001% or more and 0.5% or less;   Ga: 0.001% or more and 0.5% or less; and   Sb: 0.001% or more and 0.5% or less.   
     
     
         4 . The austenitic stainless steel according to  claim 2 , further comprising, instead of a part of Fe, in terms of % by mass, one or more selected from a group of:
 Al: 0.001% or more and 0.3% or less;   Ca: 0.001% or more and 0.3% or less;   B: 0.0001% or more and 0.1% or less;   Ti: 0.001% or more and 0.40% or less;   Nb: 0.001% or more and 0.40% or less;   Sn: 0.001% or more and 0.5% or less;   Zr: 0.001% or more and 0.5% or less;   Co: 0.001% or more and 0.5% or less;   Mg: 0.001% or more and 0.5% or less;   Hf: 0.001% or more and 0.5% or less;   REM: 0.001% or more and 0.5% or less;   Ta: 0.001% or more and 0.5% or less;   Ga: 0.001% or more and 0.5% or less; and   Sb: 0.001% or more and 0.5% or less.