... :aluminum alloy 2)No aluminum roll-axis rotation - cross-line 3)Standard: GB5237-2008 Steel Roll Aluminum1)Alloy No.:6061,6063 ... :T3-T83)Surface Treatment:1,Powder Coating 2,Anodize 3,Electrophoresis 4,Mill Finish 5,Wood Grain 6,Flourocarbon Coating 7,PVDF ...