Not only by water glass investment, but also Investment Casting for Railway Part can be produced by silica sol investment casting. During water glass investment casting: tolerance of Railway Investment Casting is CT7-CT8. Most of carbon steel castings use water glass casting process for its low cost. In silica sol investment casting: Investment Cast for Railway Part uses lost wax casting method, which can control Steel Investment Casting of Railway Part within tolerance CT5-6. Train a lot of accessories are made by investment casting, such as engine parts, transmission parts, clutch, transmission, universal transmission device, main reducer, differential and half shaft), brake system parts, steering system accessories (booster assembly, steering knuckle ball head, steering knuckle, steering wheel, steering rod, booster pump, steering, steering machine, etc.), and many of them are carbon steel castings, high chromium steel…