... /6063 T3-T8 Shapeaccording to drawing and sample (square, angle, flat, T-profile, rotundity, oval,slot)Deep machiningprecise cutting, drilling, tapping,CNC ... treatment polishing,brushing,anodized, electroplate,powder coating, sandblasting,painting , so on. 2, Typical chemical composition (GB/T3190) Aluminium GradeSiFeCuMnMgCrZnTiimpurityAl60630.2-0 ...