Al-Zn HOT-DIP Al-Zn ALLOY COATED STEEL SHEET AND METHOD FOR PRODUCING SAME

摘要

Zn-based plated steel sheet which is excellent in corrosion resistance of a flat plate portion and has good processability and also has excellent corrosion resistance of a processed portion. In order to attain the above object, the present invention provides a plating film, wherein the upper layer of the plating film contains 20 to 95 mass% of Al, 10 mass% or less of Si, and at least one of Ca and Mg, The total content of Mg is 0.01 to 10 mass% and the balance of Zn and inevitable impurities, and the Vickers hardness of the plated coating is 50 to 100 Hv on average.