Trojan is Columbia Metals’ ultimate super strength copper nickel silicon alloy, specially developed to provide a unique blend of mechnical and physical properties for high performance engineering. It has similar characteristics to Colsibro®, although Trojan is produced with increased levels of nickel and silicon in order to further increase the mechanical strength.

The alloy exhibits a remarkable blend of properties characterised by superior strength coupled with good ductility and excellent wear and galling resistance. It also possesses good thermal and electrical conductivities and excellent corrosion resistance in a many environments.

As with its sister alloy, Colsibro®, Trojan is readily machinable and finds use in a similar range of high performance automotive and motorsport applications that require superior mechanical properties.

Related Specifications of Trojan

  • C70250
  • C70252
  • CW112C
  • EN 12163
  • 2.0857
  • CuNi3Si1 (EU)
  • CuNi3Si (DE)

Nominal Composition of Trojan

Cu rem, Ni 3.0%, Si 1.0%

Mechanical Properties of Trojan

Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%) Hardness (HB)
690-800 570-750 10 190-200

Key Features of Trojan

  • Ultra-high strength
  • High electrical and thermal conductivity
  • Excellent wear and galling resistance
  • Extremely low magnetic permeability
  • Excellent general corrosion resistance
  • Outstanding bearing properties
  • Spark resistance
  • Good machinability and dimensional stability
  • Outstanding low temperature mechanical properties

Applications of Trojan

Automotive | valve guides, bushes and valve seats

Electrical | current-carrying electrical components such as slip rings, squirrel cages, springs, rotary switch contacts, contact blades, short-circuit rings and heavy duty switchgear

Offshore & marine | Downhole tools, shear pins, hydraulic valve bodies, pump components and ball valves and mechanical seals

Other | Non-magnetic tooling, plastic mould tooling, friction pads and fibre optic connectors

Case Study

Trojan: valve guides and seat inserts

Columbia Metals – a leading supplier of Trojan

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

To buy or learn more about Trojan 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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