POSCO Holdings Inc.
UTILITY FERRITIC STAINLESS STEEL WITH EXCELLENT HOT WORKABILITY AND MANUFACTURING METHOD THEREOF

Abstract:

A manufacturing method of a utility ferritic stainless steel with excellent hot workability is disclosed. The manufacturing method of a ferritic stainless steel according to an embodiment of the present disclosure includes: manufacturing a slab including, in percent (%) by weight of the entire composition, C: 0.005 to 0.020%, N: 0.005 to 0.020%, Si: 0.5 to 0.8%, Mn: 0.5 to 1.5%, Cr: 11.0 to 12.5%, Ni: 0.2 to 0.6%, P: 0.035% or less (excluding 0), S: 0.01% or less (excluding 0), the remainder of iron (Fe) and other inevitable impurities; and hot rolling the slab after heating the slab, and the heating of the slab is performed in a temperature range of 1200 to 1250.degree. C. so that the fraction of .delta.-ferrite phase in the internal structure of the slab is 80 to 95%.