The Versatility of Aluminum Castings

Aluminum castings play an important role in products for a wide range of industries. These include aerospace, military, electronics, medical and dental instruments and food and dairy applications, to name just a few.

It is a material well-known for its high strength-to-weight ratio, which makes aluminum an ideal material for countless casting applications. Heat treating can be employed to give it greater strength, ductility, corrosion resistance, and machinability.

Aluminum Grades Used in Investment Casting

Aluminum Alloy 319 -- 319 contains around 6% Si and 3.5% copper and is often used for general low cost uses because of its excellent casting and machining characteristics.

  • Ultimate Tensile Strength -- 27,000 psi
  • Yield Strength -- 16,000 psi

Aluminum Alloy A356 -- This alloy has higher strength and ductility than 356 because the levels of impurities are lower. A356 aluminum castings cost a little more but are great for machine parts, chassis parts, along with other structural parts requiring high strength or pressure tightness.

  • Tensile Strength -- 38-48,000 psi
  • Yield Strength -- 28-36,000 psi

Almag 35 (Alloy 535) -- The aluminum alloy 535, better known as Almag 35, is a lightweight high strength aluminum magnesium alloy that doesn't require heat treatment. Almag 35 offers excellent corrosion resistance, machines well and is also dimensionally stable making it great for products such as instruments or marine aluminum sand castings, as well as other uses.

  • Tensile Strength -- 40,000 psi
  • Yield Strength -- 27,5000 psi

Tenzaloy 713 -- As-cast physical properties are equivalent to the heat-treated 300 series aluminum alloys providing a cost savings because heat treatment is not necessary. Tenzaloy is a viable choice for frames, levers and brackets where impact strength or load bearing is required in the aluminum casting.

  • Tensile Strength 30,000 psi
  • Yield Strength 22,000 psi

Benefits of Aluminum Investment Casting

Investment casting of aluminum enables the casting of complex-geometry parts, with shorter lead times, greater alloy flexibility, tighter dimensional tolerances and better surface finishes, resulting in near-net shape parts that require less machining and other processing than other aluminum casting processes.

Avalon Precision Metalsmiths offers lost wax aluminum casting services for customers across the U.S. from its foundries in Cleveland, Ohio, and Markesan, Wis.

In addition to its extensive domestic expertise in aluminum investment castings, Avalon Precision Metalsmiths can provide high-quality aluminum castings via die casting, sand casting and permanent mold casting and investment casting through our offshore casting partners.

Request a quote today on aluminum investment castings or contact us for more information.

Brass and Bronze: Staples in Investment Casting
Investment Castings for the Win

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