1.stainless steel grating 2.Metal grating 3.ASTM A123,SS400 4.Common ... 4Material GradeASTM A36, A1011, A569, Q235, S275JR, SS304, Mild steel & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot dip galvanized, painted, spray ... -1985, Japan:JIS China: YB/T 4001.1-2007, Stainless steel grating