... widely used in electronic, instrument, medical, spinning machine, aviation, shipping, machinery industries and other fields2. Temper : T3-T8 O H1123. Surface ... , red, black, blue, and so on.5.Technique procedures: die casting , make mould, extrusion ,CNC (milling finish), cutting, anodized6.Certificates ISO ... of China. Al-Cu Alloy Extrusion Aluminium round Bars for machinery