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TROJAN Copper Alloy

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2.0857 (CuNi3Si) 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. It shows the following features and properties:

  • 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
  • Related Standards

    Equivalent Materials

    This material data has been provided by Matmatch.

    "Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
    All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
    Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

    Ashby charts





    23.0 °C

    8.8 g/cm³

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    23.0 °C

    10 %

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    Hardness, Brinell

    23.0 °C

    190 - 200 [-]

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    Tensile strength

    23.0 °C

    690 - 800 MPa

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    Yield strength Rp0.2

    23.0 °C

    570 - 750 MPa

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    Coefficient of thermal expansion

    23.0 °C

    1.6E-5 1/K

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    for 0-400°C

    Melting point

    1060 - 1085 °C

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    Thermal conductivity

    23.0 °C

    159 W/(m·K)

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    Electrical conductivity

    23.0 °C

    1.74E+7 S/m

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    Specific Electrical conductivity

    30 % IACS

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    Relative magnetic permeability

    23.0 °C

    1 [-]

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    Chemical properties





    2.6 - 4.5 %

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    0.8 - 1.3 %

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    Technological properties

    Application areas

    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

    Corrosion properties

    Excellent corrosion resistance

    General machinability

    Good machinability

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