POSCO Holdings Inc.
High specific strength steel sheet and method for manufacturing same

Abstract:

A high specific strength steel sheet and a method for manufacturing same are disclosed. The high specific strength steel sheet, which is an aspect of the present invention, is characterized in that an Fe--Al-based intermetallic compound having an average particle diameter of 20 .mu.m or less is homogeneously dispersed in an austenite matrix, the volume fraction of the Fe--Al-based intermetallic compound is 1 to 50%, and the volume fraction of .kappa.-carbide ((Fe,Mn).sub.3AlC) which is a perovskite carbide and has an L12 structure is 15% or less.