Gray iron sand casting is an easy and economical process to create basic part shape. Sand casting is the oldest, most common, and simplest of the casting processes. The sand casting process is also the least costly of the casting processes. Normally the sand casting process is used for low temperature alloys, such as aluminum, copper, grey iron, magnesium, and nickel alloys. However, the sand casting process can be used for higher temperature metal, such as steel and stainless steel alloys, when other production processes would not be practical. Gray Iron sand castings are often used to produce prototypes, due to the speed and relative low cost of production when compared to other manufacturing techniques