... Valve PartsMaterial: Alloy SteelMachined by NC MachineNDT Test madeProcess:Investment Casting1. Name: Valve Gate, Gate Valve Parts, Machining ... Parts2. We cast the parts by Investment Casting. The materials include Alloy Steel, Carbon Steel, ... , Copper, Aluminum Bronze, Malleable Iron etc.2) Process: Investment Casting, Sand Casting (Resin Sand Casting, Green Sand Casting), ...