Copper Alloys


CHROMZIRC-3 is a copper chromium alloy with the outstanding electrical and heat transfer properties of copper but without the drawbacks of being soft and ductile.

The addition of a small amount of chromium ensures its high strength, especially after suitable heat treatment that achieves its good mechanical properties.

CHROMZIRC-3 is predominantly used in resistance welding equipment and in the field of electrical engineering.

Related Specifications of CHROMZIRC-3

  • CC101
  • C18200
  • CW105C
  • BS4577 A/2/1
  • BS2874
  • 2.1291
  • CuCr1
  • CuCr (DE)

Nominal Composition of CHROMZIRC-3

Cu rem, Cr 1.0%, Zr 0.1%

Mechanical Properties of CHROMZIRC-3

Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%) Hardness (HB)
450 400 20 140HV

Key Features of CHROMZIRC-3

  • High electrical conductivity
  • High thermal conductivity
  • High strength
  • Resistance to softening at elevated temperatures

Applications of CHROMZIRC-3

Electrical | Switchgear components, circuit breaker parts, rotating electrical machinery; electrical and thermal conductors

Chemical processing | Turbine generators, current-carrying arms and shafts for process plants

Other | Resistance welding, electrodes, shafts, electrode holders, seam welding wheels and flash or butt welding dies

Columbia Metals – a leading supplier of CHROMZIRC-3

With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of CHROMZIRC-3 and other high quality specialist engineering alloys.

To buy or learn more about CHROMZIRC-3 contact us now, or fill in the enquiry form on the right hand side and we will be in touch shortly.

  Related Specifications Mechanical Properties
Alloy Name BS UNS BS EN Others Ultimate Tensile Strength N/mm² Minimum Yield Strength N/mm² Elongation % Hardness HB  
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