... by NC Machine 4.NDT Test made 5.Process:Investment Casting Valve GateGate 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 ... Standard: ASTM, BF,BS, JIS, UNI, ANSI, ISO etc. Investment Casting Valve Gate