Steel sheet metal

Abstract

This plated steel sheet includes a steel sheet, and a plated layer disposed on a surface of the steel sheet, wherein the plated layer has a chemical composition containing, in % by mass, Al: 10.0 to 25.0%, Mg: 3.0 to 10.0%, Fe: 0.01 to 2.0%, and Si: more than 0 to 2.0%, with a remainder including Zn and impurities, and a number density of Mg2Si phases with a major axis of 2 µm or more exposed on the surface of the plated layer is 3 to 150 per area of ​​10,000 µm2.