Casting is the operation that consists in extracting the molten metal from the melting apparatus and in introducing it into the molds. It requires constant focus and significant know-how. Cast irons are alloys. Techniques have hardly changed since the 19th century at the GHM foundry, and its cast irons differ from other alloys by their excellent flowability. Cast iron has a melting temperature ranging from 2 075° F to 2 553° F (1,135 ° C to 1,400 ° C), essentially depending on the percentage of carbon and silicon it contains.