Sand casting for impeller Materials: ASTM B30-92 C95200 C87800,B763-90 C95800 C95500,B584-91A C83450 C83600 Diameter:50-500 mm MaterialASTM B30-92 C95200 C87800,B763-90 C95800 C95500,B584-91A C83450 C83600ProcessSand castingCertificateISO9001:2000StandardCustomer requirementSpecification drawingsPro/E ,Auto CAD , Solid work, CAXA UG, CAD/CAM/CAEPrecision machiningCNC, milling machine, drilling ...