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Beryllium Copper Alloys

Supplier: James Coppell Lee

Brush Wellman (USA) is a leading International supplier and producer of high performance engineered materials and is the only fully integrated Beryllium producer in the world.

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James Coppell Lee is Brush Wellman's representative in Australia and New Zealand, an association which has been in place for over 30 years.

Beryllium copper is manufactured in several distinct chemical compositions ranging in beryllium contents from 0.25 to 2.00% (weight %)

These fall into two categories: alloys selected for high conductivity and alloys selected for high strength.

High Conductivity Alloy:

Nickel Beryllium Copper Alloy (U50) conforming to R.W.M.A. Class 3 specifications is suited for use in resistance welding applications and where properties combining strength, hardness and electrical conductivity are required.

This alloy is easily fabricated by machining using standard tooling and machine shop practices.

It can be supplied as Rod, Seam Welder Wheels and Forgings.

Applications:

  • Spot and Seam Welding of stainless steel and heat resisting alloys.
  • Dies for flash, butt and projection welding.
  • Seam welder wheel spindles.
  • Backings for V14 sintered tungsten copper inserts.
  • Plunger tips for pressure die casting Aluminium.

High Strength Alloy:

Beryllium Cobalt Copper Alloy (U77) conforming to R.W.M.A. Class 4 specifications is suited for use where extremely high hardness, strength and abrasive qualities are required.

Due to the hardness of the alloy when fully heat-treated, machining becomes somewhat difficult particularly in drilling and tapping of small holes.

Where extensive machining is to be done, the alloy can be supplied in the annealed condition and then hardened after machining by simple heat-treatment.

Grinding tolerance should be allowed prior to the final heat-treatment.

This alloy can be supplied as forgings and rod.

Applications:

Special flash butt welding jaws or projection welding dies. (Where high mechanical properties are required but where current density and heat are not excessive)

Current carrying collets, chucks, bearings, shafts and structural members requiring high strength properties.

In Plastics Field: dies, nozzles and inserts for pressure casting or injection moulding of plastic materials.

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