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

摘要

Disclosed is a hot-dip Al-Zn alloy coated steel sheet having good corrosion resistance in flat parts as well as good workability and thereby has excellent corrosion resistance in worked parts. In the disclosure, the upper layer of the hot-dip coating has a composition containing Al in an amount of 20 mass% to 95 mass%, Si in an amount of 10 % or less of the Al content, at least one of Ca and Mg, the total content of Ca and Mg being 0.01 mass% to 10 mass%, and the balance including Zn and incidental impurities, and the mean Vickers hardness of the hot-dip coating is 50 Hv to 100 Hv.