Investment Casting is a precision casting,it is also called lost wax casting,one of the oldest known metal-forming techniques. the castings allow the production of components with accuracy, repeatability, versatility and integrity in a variety of metals and high-performance alloys. Lost-foam casting is a modern form of investment casting that eliminates certain steps in the process.There are a variety of materials that can be used for the investment casting process, including stainless steel alloys, brass, aluminum, and carbon steel. The material is poured into a ceramic cavity designed to create an exact duplicate of the desired part. Investment casting can reduce the need for secondary machining by providing castings to shape.