... 2000 1.Material:steel grating is made of low carbon steel plate,stainless steel plate,flat steel plate,etc2.Technique:steel grating is made ... GradeASTM A36, A1011, A569, Q235, S275JR, SS304, Mild steel & Low carbon steel, etc5Surface TreatmentBlack, self color, hot dip galvanized, painted, spray ... BS4592-1987, Australia: AS1657-1992, Japan:JIS Galvanized and Painted Steel Grating with standard size