Righton Blackburns is the sole UK distributor of Hardiall®, a high hardness and low friction copper alloy designed for extreme conditions, manufactured by Lebronze alloys.

Hardiall®, manufactured by Lebronze alloys, is a wrought, spinodally hardened copper nickel tin alloy CuNi15Sn8 (C72900) designed for high strength applications where toughness is required. It is non-magnetic and resists mechanical wear, galling, stress relaxation, corrosion and erosion. It is easily machined into complex components and is environmentally friendly being both lead and beryllium free.

Hardiall is a direct equivalent to Toughmet® 3 and is an ideal proven track record solution. Extensive testing ensures that Hardiall is in full compliance with the relevant specifications: in that regard, using Hardiall can help high-end industries mitigate their supply chain risks.

Lebronze alloys’ manufacturing process for Hardiall® is fully integrated: internal processes include casting, hot and cold working stage, heat treatment and non-destructive testing. Being fully integrated ensures reactivity and complete traceability.

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Alloy Designations

  • ISO composition: CuNi15Sn8
  • European standards: EN 12163/CW355H
  • UNS: C72900
  • ASTM/AMS ASTM B 505 - AMS 4596, AMS 4597, AM 4598
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Hardiall® is increasingly being used in a wide range of industries where thanks to the unique combination of properties it is helping to prevent failures and ensure a longer lifespan compared to traditional materials. Industries include motorsport, aerospace, oil & gas, construction, mining & heavy transport, automotive, defence, space, marine, power transmission and renewable energy.


Physical Properties

Property Value Unit

Electrical Conductivity at 20oC (68oF)



Thermal Conductivity at 20oC to 200oC (68oF to 392oF)

38 (22)

W/m/oC (Btu/ft/hr/oF)

Coefficient of Thermal Expansion at 20oC to 200oC (68oF to 392oF)

16.4 x 10-6 (9.1 x 10-6)

Per oC (Per oF)


8.95 (0.323)

g/cm3 (lb/in3)

Key Features

  • High strength and hardness
  • Low friction
  • Excellent lubricity
  • Corrosion and erosion resistant
  • Excellent wear resistance
  • Excellent machinability
  • Excellent galling resistance
  • Pitting and spalling resistance
  • Zero hydrogen embrittlement
  • High performance at elevated & sub-zero temperatures (-193oF - 572oF)
  • Dimensional Stability
  • Beryllium and lead free
  • Recyclable


Hardiall® is supplied peeled, with no mill scale and is up to 3% in supplied weight lighter, which gives up front material cost savings and negates the need for a descale machining operation. Standard Tolerance is + 1mm/- Nil

Hardiall® provides a longer lifespan to components minimising maintenance time and associated costs. Thanks to its high reliability it prevents unpredicted breaking events avoiding downtime.

Find your local Service Centre

An extensive UK network of Service Centres, backed up by a central distribution facility.

Warehouse - Righton Blackburns

Find your local Service Centre

An extensive UK network of Service Centres, backed up by a central distribution facility.

  • Experienced multi-product specialists

  • In-house state of the art processing facilities

  • Large fleet of bespoke delivery vehicles

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Hardiall 11 naturelle