... or 8620 3.high quality machining parts 4.Smooth casting, free of sand Precision Casting parts Detail:1). Aluminum casting machining ... 3). Material Available: Ductile iron QT450, ASTM A536 65-45.12, ASTM 8620, ASTM 8630, ASTM A148 grade 90-60, ... 4. Products covering hydraulic cylinders, pistons, flanges, valves parts, casting and forging parts, engineering goods, etc. 5. Quality control following 3 ...