... Steel Welded Grating Material:steel grating is made of low carbon steel plate,stainless steel plate,flat steel plate,etc Technique:steel ... should be untreated,painted or hot dipped Galvanzied Specification:steel grating No.ItemDescription1Bearing Bar25x3, 25x4, 25x4.5, ... , A1011, A569, Q235, S275JR, SS304, Mild steel & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot dip galvanized, ...