... 2. Type: Plain,Serrated,I-bar mild steel grating galvanized steel grating floor grating ... ProductsManufacturing Process Main Market85% of mild steel flooring grating are exported to the ... 19-w-2, 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, 50, 60, 76, 80, ... 4Material GradeASTM A36, A1011, A569, Q235, S275JR, SS304, Mild steel & Low carbon steel, etc5Surface TreatmentBlack, self colour, ...