Aluminum Alloy Casting

Aluminum investment castings are widely used in industries where lightweight construction, corrosion resistance, and dimensional precision are essential. In aerospace and defense, aluminum castings are specified for structural components, housings, fittings, and impellers where minimizing weight without sacrificing strength is critical. In the electronics and telecommunications sectors, aluminum's excellent thermal conductivity makes it a preferred choice for heat sinks, enclosures, and connectors. Industrial equipment manufacturers rely on aluminum castings for pump housings, valve bodies, and mechanical components that require corrosion resistance in demanding operating environments. The versatility of aluminum alloys — combined with the design freedom offered by the investment casting process — makes them an ideal solution for components across a wide range of applications.

Precision Investment Casting for Aluminum Alloys 

Engineered Precision Casting Company has been casting aluminum alloys for over 80 years. We support projects from early-stage prototypes through high-volume production runs, with the expertise to handle complex, thin-walled, and multi-cored components that many foundries can't.

We also offer a full range of secondary services — including heat treatment and non-destructive testing — so you can consolidate your supply chain with a single trusted partner.

Selecting the right alloy depends on the demands of your specific application. Here's a comparison of the different aluminum alloys we offer:

A356

A356 is the most widely used aluminum casting alloy and serves as the standard material for a broad range of aerospace, defense, and industrial applications where a reliable combination of strength, corrosion resistance, and castability is required. A356 is also widely recognized as a reliable substitute for 6061 aluminum bar stock, offering equivalent or superior properties in complex cast geometries that would be prohibitively expensive to machine from solid billet.

C355 

C355 is specified when the moderate strength of A356 is insufficient for the application and elevated temperature performance is a consideration. Its higher copper content compared to A356 provides increased tensile and yield strength, particularly at operating temperatures above ambient, making it the preferred choice for components that experience sustained thermal loading in service. 

A357

A357 is the highest-strength aluminum casting alloy we cast and is specified for the most structurally demanding aluminum applications where maximum strength-to-weight ratio is the primary requirement. Its higher magnesium content and beryllium addition — which refines the alloy's microstructure and improves response to heat treatment — produce tensile strengths exceeding those of A356 and C355 in the T6 condition.

Customers for whom beryllium is a concern should consider F357, which provides comparable mechanical properties in a beryllium-free composition.

Let's Talk About Your Project

Whether you're selecting an alloy or ready to move forward with a casting project, our team is here to help. Contact us to discuss your requirements or to request a quote.