POSCO Holdings Inc.
AUSTENITIC STAINLESS STEEL HAVING EXCELLENT PROCESSABILITY AND SURFACE CHARACTERISTICS, AND MANUFACTURING METHOD THEREFOR

Abstract:

An austenitic stainless steel having excellent processability and surface characteristics and a method method of manufacturing the austenitic stainless steel are disclosed. The austenitic stainless steel includes, by weight %, 0.005% to 0.15% of carbon (C), 0.1% to 1.0% of silicon (Si), 0.1% to 2.0% of manganese (Mn), 6.0% to 10.5% of nickel (Ni), 16% to 20% of chromium (Cr), 0.005% to 0.2% of nitrogen (N), the remainder iron (Fe) and other unavoidable impurities, wherein a degree of Ni surface negative segregation defined by the following Formula (1) is in a range of 0.6 to 0.9. (C.sub.Ni-Min)/(C.sub.Ni-Ave) Formula (1), where C.sub.Ni-Min is a minimum concentration of Ni on the surface of the austenitic stainless steel and C.sub.Ni-Ave is an average concentration of Ni on the surface of the austenitic stainless steel.