... ; 3.smooth finish:6.4; 4.hardness: 85(HB); 5.heat treatmen; Gravity casting parts:1) Material:A356, ZL101, ZL107, ZL111 ... turning, CNC milling, drilling,etc;5) Surface Finish:Chrome plating,spray-paint,Sandblasting, Powder Coating,anodisation,etc.6)Inspection equipment:spectrograph,three ...