Our aluminum casting range of products includes aluminum pressure die casting, aluminum gravity die casting, aluminum sand casting.
Aluminum investment castings from our China foundries directly compete with aluminum die castings. However, aluminum investment castings (lost wax casting) with the use of soluble core technology can allow for internal geometry that cannot be created in die casting due to molding core constraints.
Typically, aluminum investment castings will be more expensive than die casting, however the tooling costs for investment casting will be less expensive than die casting. In general lower volume parts are more suited for investment casting than die casting. Die casting is more automated than investment casting therefore reducing piece part costs.
Aluminum castings are typically used for weight reduction due to the fact that aluminum is stronger than steel on a pound for pound basis. This makes them suitable for any application requiring weight reduction such as the marine, automotive, aerospace and many other industries, its favored for being light weight and durable...

Below is some more information on aluminum castings and alloys:
Typical uses for aluminum castings include engine parts, components and casings for the automotive and aerospace industries, brackets, electronic housings, light aircraft components, gear box casings and many other applications.
High strength with lightweight applications.
Cast aluminum alloys with strengths into the mild steel properties.
Prototype thru production runs.
Cast in all three molding processes: permanent mold, green sand and no-bake.
CAD computer files accepted.
Engineering assistance available.
Finishing options: heat treat, machining, paint/powder coat, chem treat, assemblies.

A foundry may be a factory that produces metal castings. Metals are cast into shapes by melting them into a liquid, pouring the steel in a mold, and getting clear of the mold material or casting right after the steel has solidified since it cools. Essentially the most widespread metals dealt with are aluminum and cast iron. However, other metals, along the lines of bronze, steel, magnesium, copper, tin, and zinc, are also used to develop castings in foundries.