Zinc casting alloys provide a better combination of strength, toughness, rigidity, bearing, performance and economical castability than any other alloy possible. In fact their properties often exceed the ones of other alloys such as aluminium, magnesium, bronze, plastics and other cast irons.
Aluminium castings is chosenbecause it has demonstrably the best combination of physical and mechanical properties for casting, including being lightweight, very strong at high temperatures and corrosion resistant also excellent strength-to-weight ratio, electrical/thermal conductivity and high ductility.