Copper-Based Castings (Brass, Bronze, Silicon Copper Alloy)

Cu Copper-Based Alloy Casting, Lock Hardware Cylinder, Security/Door/Lock Hardware Industry

Material CA87600: Cu Copper-Based Alloy Casting, Barrel Band, Firearms

Material CA87600: Cu Copper-Based Alloy Casting, Firearms Barrel Band, Firearms Industry

Material Cooper Silicon 876: Cu Copper-Based Alloy Casting, Locomotive Engine Component, Heavy Equipment

Material Cooper Silicon 876: Cu Copper-Based Alloy Casting, Rail Locomotive Engine Component, Engine Industry

Cu Copper-Based Alloy Casting, Lock Hardware Cylinder, Security/Door/Lock Hardware

Material Silicon Brass C87500: Cu Copper-Based Alloy Casting, Firearms Machinery Insert, Construction Industry
Material Silicon Brass C87500: Cu Copper-Based Alloy Casting, Machinery Insert, Construction Hand Tools

Copper and copper-based alloys, like many other alloys, are adaptable to the investment cast process by being able to form highly complex parts. These materials are very price sensitive and waste can become very costly, especially when considering CNC machining and/or forging as a manufacturing process to produce your production part. The investment cast process produces a net or near-net part which eliminates additional machining required when using a forging. The same holds true when machining a part from billet. Both reduce costly CNC machine time and the low return on scrap alloy material. This puts investment casting on an equal footing with these other processes when forming highly complex production parts.

Aero Metals Inc. can produce several copper and copper-based alloy castings. The most recognizable alloys or those used in everyday living are brass and bronze alloys. Brass alloys, know of “red-brass” or “yellow-brass” alloys, are mostly used in the plumbing and door hardware industries due to their finishing and polishing qualities. Since U.S. Environmental Regulations has limited the lead content in brass plumbing fixture to reduce lead particles leaching from the brass fixtures, the copper industry has developed a few “EnviroBrass” (SeBiLOY) alloys that have almost eliminated lead in this brass alloy to become standards in the drinking water industry.

Bronze, mostly used in bearing designs, is also a copper-based alloy and a very adaptable bearing material and offers a broad range of properties from a wide selection of alloys and compositions.  Bronzes have similar compositions and properties, but it is the added element (tin, lead, aluminum, and manganese) which provides its best performance in their environment. Tin, for example, when added provides strength; add lead and it increases the antifriction properties; add more lead for lubricity but it will result in a decrease of strength. When aluminum and manganese are added to bronze, it serves those applications that require both corrosion resistance and high strength.

Copper-Beryllium, also known as Beryllium-Copper, is another copper based alloy that Aero Metals Inc. pours on a regular basis and is mainly in the Aerospace Industry. This copper alloy is very expensive, but has tremendous strength, high conductivity, and extremely low sparking while being very friendly to machining.  These attributes make Beryllium-Copper for specialized, high reliability applications and proves to be worth every penny.  For more information on Beryllium-Copper, please visit our Beryllium Copper page to find out more about the strongest of the copper-based alloys.

Casting Copper Alloys

Aero Metals has provided precision, copper-based alloy investment castings to it customers for decades.  Here are some of the most common casting alloys and their general uses (product most seen in):


  • CA95200 (Slides, landing gear parts, marine engine parts)
  • CA95300 (High temperature applications)
  • CA95400 (Gears and pumps)
  • CA95500 (Bushings, gears, high strength requirement mechanisms)
  • CA95800 (Saltwater exposed parts)


  • CA87600 (Various applications, replaces less eco-friendly bronzes)
  • CA86300 (Bearings, and gears)
  • CA86400 (Brackets, replace machine parts, lever arms, marine fittings and marine propellers)
  • CA86500 (Functional, strength required parts)


  • CA85700 (Plumbing flanges, fittings, decorative, and hardware)
If you don’t see the alloy of your interest, we have the ability to pour any “air melted” Copper or Copper-based alloy. Contact us to have our resident metallurgist help in choosing an alloy for your project. We can help you find the right alloy to fit your particular needs.