Beryllium Copper Castings
Beryllium copper castings provide many advantages in demanding commercial, industrial, and aerospace applications. Aero Metals is one of very few investment cast foundries with the expertise to work with beryllium copper and other exotic alloys in both low and high volume production. We pour over 250,000 lbs. of beryllium copper castings every year, and have been casting beryllium copper since the early 1980s. The demand for this specialty alloy has been increasing ever since.
Advantages of Beryllium Copper Castings
There is nothing soft about a beryllium copper casting. When heat treated, this high strength alloy provides high thermal and electrical conductivity. Beryllium copper offers hardness values greater than many steels, but provides thermal conductivity similar to or greater than that of aluminum. Beryllium copper castings are ductile, are easily welded, and very easily machined. This material is also resistant to non-oxidizing acids and to plastic decomposition products.
Beryllium copper casting alloys with 2.0% to 2.75% beryllium content provides outstanding wear, toughness, and anti-galling characteristics. In challenging geometric shapes with thin walls and detailed internal passages, beryllium copper provides excellent replication of finer details.
Even though beryllium copper exhibits high conductivity, it does not spark and is non-magnetic. This material fulfills the requirements of the ATEX directive and is safe to use in “Ex Zones” where hazardous, flammable, or combustible vapors, liquids, dust, or residues may be present.
Common Beryllium Copper Casting Alloys
High Strength Beryllium Copper
- C82500 (20C): Be% 1.90-2.25; Co% 0.35-0.70; Si% 0.20-0.35; Cu balance
- C82800 (275C): Be% 2.50-2.85; Co% 0.35-0.70; Si% 0.20-0.35; Cu balance
High Conductivity Beryllium Copper
- C82000 (10C): Be% 0.45-0.80; Co% 2.40-2.70; Cu balance
- C82200 (3C): Be% 0.35-0.80; Ni% 1.00-2.00; Cu balance