Investment casting is also known as the lost wax process. Benefits of Investment casting: 1.Intricate shapes can be made with high accuracy. 2. metals that are hard to machine or fabricate are good candidates for this process. 3. It can be used to make parts that cannot be produced by normal manufacturing techniques, such as turbine blades that have complex shapes, or airplane parts that have to withstand high temperatures. The types of materials that can be cast are Aluminum alloys, Bronzes, tool steels, stainless steels, Stellite, Hastelloys, and precious metals. Parts made with investment castings often do not require any further machining, because of the close tolerances that can be achieved