Building Material Bwg34 PPGI Color Coated Prepainted Steel Metal Roof Sheet Price 20 Gauge Gi Galvanized Corrugated Sheet Roofing Sheet China Gi PPGI Hot Dipped Prepainted Color Coated Corrugated Galvanized Zinc Coated Roofing Steel Sheet for Building Material
Al-Mg-Mn Alloy Sheet for building ,The corrugated steel sheet is made by cold-rolled steel plate, electro-galvanized steel plate, hot-dip galvanized steel plate or galvanized steel plate as substrate after surface degreasing, phosphating, chromate treatment, and coated with organic coating. .