POSCO Holdings Inc.
Steel sheet coated with aluminum-magnesium

Abstract:

The present invention relates to an aluminum-magnesium coated steel plate using vacuum coating, wherein an aluminum-magnesium coating layer is constituted by 1 to 45 wt % of magnesium, a balance of aluminum, and other inevitable impurities, and an Al.sub.3Mg.sub.2 alloy phase is formed in the aluminum-magnesium coating layer by performing heat treatment of the steel plate.