POSCO Holdings Inc.
LOW-DENSITY CLAD STEEL SHEET HAVING EXCELLENT FORMABILITY AND FATIGUE PROPERTY AND MANUFACTURING METHOD THEREFOR

Abstract:

Provided is a low-density clad steel sheet having excellent formability and fatigue properties, including a base material; and cladding materials provided on both side surfaces of the base material, wherein the base material is a lightweight steel sheet including, by weight, C: 0.3 to 1.0%, Mn: 4.0 to 16.0%, Al: 4.5 to 9.0%, and a remainder of Fe and inevitable impurities, and each of the cladding materials is martensitic carbon steel including, by weight, C: 0.1 to 0.45%, Mn: 1.0 to 3.0%, and a remainder of Fe and inevitable impurities.