POSCO Holdings Inc.
ALLOY-COATED STEEL SHEET AND MANUFACTURING METHOD THEREOF

Abstract:

Provided is an alloy-coated steel sheet and a manufacturing method thereof. The alloy-coated steel sheet includes: a steel sheet; and an Al--Mg--Si alloy layer disposed on the steel sheet, wherein the Al--Mg--Si alloy layer has a form in which Mg--Si alloy grains are included in an alloy layer consisting of an Al--Mg alloy phase.