Spheroidal Graphite Iron Casting, also as known Ductile Cast Iron or Nodular Cast Iron, is a type of cast iron which has high ductility and strength due to graphite is turned into nodular by adding some agents such as Mg, Ca, etc. We classified SGIC as one of our critical process because SGIC is designed for high strength and ductility functional parts it may occurred serious problem if the process was not good control and their properties would drop like a normal cast iron. The Spheroidal Graphite microstructure is shown as a picture below. The material codes in this scope are FCD, FCDP or FCDA.