Plated Steel Sheet

Abstract: This plated steel sheet comprises a steel sheet and a plating layer disposed over a surface of the steel sheet. The chemical composition of the plating layer contains, in mass%, 10.0-30.0% Al, 3.0-15.0% Mg, 0.01-2.0% Fe, greater than 0 to 2.0% Si, and 0.05-2.0% Ca, as well as one or two elements selected from the group consisting of group A and group B, with the remainder being Zn and impurities. The number density of Ca-Zn phases with an equivalent circle diameter of 1 µm or greater exposed on the surface of the plating layer is 0-10 per 10,000 µm2 area, and the number density of Al-Si-Zn-Ca phases with an equivalent circle diameter of 1 µm or greater exposed on the surface of the plating layer is 1-50 per 10,000 µm2 area.

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