aluminum alloys ,Aluminum, Zinc and Copper alloys are the materials predominantly used in die-casting. On the other hand, die casting alloys Zinc is rarely cast due to high shrinkage, and susceptibility to hot cracking. It is alloyed with Silicon, which increases melt fluidity, reduces machinability. Copper is another alloying element, which increases hardness, reduces ductility, and reduces corrosion resistance
Die casting is a manufacturing process in which molten metal is injected, under pressure, into a hardened steel die or also called mold. Dies are often water-cooled. Dies are then opened, and the die castings are ejected (many times thousands of parts each day, sometimes only a few hundred). Once the tooling is paid for, die casting is a very inexpensive aluminum part manufacturing process.