Profile: Investment Castings (Congleton) Ltd. specializes in manufacturing precision castings. The materials used for investment castings include stainless steel, carbon steel, aluminum, brass, bronze, tool steel, cast steels, cast iron and cobalt alloys. We also offer milling, drilling, tapping, grinding and turning services. Our finishing services include alcroming/anodizing, barrel rumbling, electropolishing, electro nickel coating, hand polishing, powder coating, vibro polishing, passivation, painting, non destructive testing and zinc plating services.