POSCO Holdings Inc.
HIGH TENSILE STRENGTH STEEL HAVING EXCELLENT BENDABILITY AND STRETCH-FLANGEABILITY AND MANUFACTURING METHOD THEREOF

Abstract:

Provided is a high tensile strength steel having a tensile strength of 780 MPa grade or higher which is used for structural members of automobiles, and more specifically relates to high tensile strength steel having excellent bendability and stretch-flangeability while still satisfying characteristics of DP steels of low yield ratio and high ductility, and to a manufacturing method thereof.