... 1.Sand Casting Impeller2.Material: Ductile Iron3.Machined by NC Machine4.Sand Castintg Process5.Balancing test madeCasting Impeller3x4Rx131.8 Centrifugal ... .We are able to supply the products as follows:1) Materials include: Stainless Steel, Carbon Steel, Alloy ... Casting, Green Sand Casting), Permanent Casting, Die Casting, Centrifugal Casting, Forging and Stamping etc.3) Machining Types: Machined ...