0.50mm DX51D Z120 Corrugated Steel Roof Sheets for Industrial and Residential Roofing 1.Product Overview 0.50mm DX51D Z120 Corrugated Steel Roof Sheets are profiled galvanized steel products designed for industrial workshops, warehouses, residential buildings, agricultural facilities, garages, shelters, and general roofing applications. The product uses DX51D galvanized steel as the substrate with a Z120 zinc coating. After galvanizing, the flat steel sheet is processed