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® is manufactured by Lebronze alloys in an entirely integrated process, is a wrought and spinodally hardened alloy of copper, nickel, and and tin (CuNi15Sn8 / C72900). It has been developed with the express intent of delivering where high strength and toughness is demanded. Designed to be as resistant as possible to mechanical wear and abrasion such as galling and stress relaxation, as well as corrosion and erosion, Hardiall® is the go-to for many components where failure is not an option. Despite its toughness and dimensional stability within a huge range of temperatures (-125°C to 300°C), Hardiall® can still be formed into complex structures with ease. On top of all that, being free from lead or beryllium, Hardiall® is environmentally friendly.

Developed for the same applications as Toughmet® 3, Hardiall® has a proven track record in consistent performance and reliability. Being demonstrably and fully compliant with all relevant industry specifications and standards through extensive testing means Hardiall® is an ideal product to remove supply chain risks in high-end manufacturing industries.

As the entire manufacturing process used by Lebronze alloys for Hardiall® is integrated from beginning to end (from casting, through hot and cold working stage, to heat treatment and non-destructive quality testing), you can be sure of that the product meets all specifications. This integrated process also ensures complete traceability of the product.

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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


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.

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

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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