0.50mm DX51D Z120 Hot Dipped Galvanized Steel Coils for Roofing and Building Fabrication 1.Product Overview 0.50mm DX51D Z120 Hot Dipped Galvanized Steel Coils are zinc-coated steel products designed for roofing sheets, wall panels, ventilation components, building accessories, equipment housings, and general sheet metal fabrication. The product uses DX51D steel as the substrate with a Z120 zinc coating. During continuous hot-dip galvanizing, the steel strip passes through a