Steel casting is one of the casting alloys and consists of mainly iron and Carbon. The steel casting is preferred to be adopted when the iron casting can not meet the requirement of the function, especially in terms of strength. Steel castings can be categorized into general structure steel casting, welding structural steel casting, stainless and high temperature steel casting according to usage. And chemically, steel castings can be called carbon steel and alloy steel. Furthermore, if based on its characteristics, the steel castings can be listed as tool steel, special steel, engineering & structure steel and alloy steel.