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Hardiall® spinodal alloys


Hardiall® is a wrought spinodally hardened copper 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 whilst being environment friendly, being recyclable and both lead and beryllium free.

Hardiall® is used within the automotive industry thanks to its outstanding physical and mechanical properties. Lebronze alloys has developed a full range of Copper Chromium, Copper Nickel Aluminum Bronzes, Spinodal Copper Nickel Tin grades all exceeding industry standards for use in many varied applications.



Hardiall® Properties and Benefits

Standards : CuNi15Sn8 ; UNS C72900 ; ASTM B 505.

  • CuNi15Sn8 alloys; such as Hardiall® products, are being registered under the EN 12163 norm: the designation will be CW355H with available grades Y760, R1100 and R1130.
  • They are beryllium and lead free to answer environmental concerns on potential harmful elements
  • Copper Beryllium CuBe2 grade substitution such as CW101C grades as per EN 12163 can be achieved with our spinodal CuNi15Sn8 material, reaching similar mechanical properties together with superior surface properties and workability.
Hardiall® Key features & Benefits

High strength and hardness

Easy implementation

Low friction

Excellent galling resistance

Corrosion & Erosion resistant

Pitting and spalling resistance


No Hydrogen embrittlement

Excellent lubricity

High performance at both elevated and sub-zero temperatures -125℃ up to 300℃

Excellent wear resistance

Dimensional stability

Excellent machinability

 High pressure and load resistance 

Excellent fatigue strength

Hardiall® is available in two tempers: TX temper (wrought hot worked and spinodally hardened temper) and TS temper (wrought hot worked, cold finished and spinodally hardened temper) for even higher mechanical properties.

This Copper-Nickel-Tin spinodal alloy has a specific metallurgy enabling a spinodal decomposition and thus providing a unique combination of material properties.

High mechanical properties are reached by hot working or a combination of hot and cold working processing and are drastically enhanced with a final heat treatment controlling the spinodal decomposition.

For example, a threefold increase in the yield strength over the base metal is achieved after the spinodal decomposition treatment.

This heat treated "spinodal alloy" is a very good bearing and bushing material due to its high strength, low magnetic sensitivity, excellent machinability, maximum corrosion resistance

Additionally, its high surface resistance under impact loads and especially in critical lubrication conditions.

Compared to conventional bearing materials it provides longer lifespan, higher reliability and better construction flexibility

Hardiall is used under various environmental conditions, under high and very high loads at low and high speeds, lubricated, periodically lubricated or little lubrication in the temperature range from 73 C to + 300 C in combination with different materials.

Available forms
European Norms
Safety sheet
Hardiall® Aerospace CuNi15Sn8 C72900 ASTM B 505 - ASTM B 929 - AMS 4596 - AMS 4598 - AMS 4597
Hardiall® Automotive CuNi15Sn8 C72900 ASTM B 505
Hardiall® Mining CuNi15Sn8 C72900 ASTM B 505 - AMS 4596 - AMS 4597
Hardiall® Oil & Gas CuNi15Sn8 C72900 ASTM B 505 - AMS 4596 - AMS 4597 -
Hardiall® Defense CuNi15Sn8 C72900 ASTM B 505 - AMS 4596 - AMS 4597 - -
Hardiall Eco® Automotive CuNi9Sn6 C72700 - -
Hardiall Eco® Construction and Mining CuNi9Sn6 C72700 - -

Hardiall® Key Applications


Actuation systems friction bushings and bearings for primary and secondary flight controls, wheels and brakes and various aircraft systems attachments
In landing gears, bushings and bearings are required to operate under severe conditions high loads, increasing hydraulic systems pressure requirements they need to be lubricated and replaced frequently causing recurring maintenance downtimes.
To reduce maintenance costs Hardiall® is used for such applications as it demonstrates excellent lubricity, wear, and galling resistance. Thus providing a longer service life and an improved total cost of ownership (TCO) compared to other copper and non-copper alloys materials.
Hardiall® is ideal for applications where the load required exceeds the performance of copper-nickel-aluminum based alloys or where lubricity is critical and titanium cannot satisfy the Engineers requirements.


Heavy Mining Equipments and Vehicles Linkage Bushings and Bearings, Tri-Cone, Reamers HDD Tools DTH Tools Bushings, Thrust Washers
In mining equipment, bushings and bearings are highly solicited components operating in aggressive media with harsh minerals. They need to be lubricated and replaced frequently implying recurrent production downtimes and maintenance man hours.
Hardiall® is used in excavators, haul trucks, mining shovel and draglines, continuous miners. For such mining vehicles, Hardiall® demonstrates excellent lubricity, wear and galling resistance making it the ideal material for bushings and bearings.
For these applications, Hardiall® outperforms steel and manganese bronze by increasing the durability, the reliability and the lubrication cycles of highly solicited bushings and bearings.

Oil & Gas Onshore Artificial lift sucker rods, valve guide couplings

Offshore Subsea Wellhead Controls, Manifold, Mud Pumps, , LWD MWD Components HDD tools crill bit bearings bushings trust washers ,ROV hydraulic connectors, Valves Trim
Hardiall is specifically used offshore subsea applications where the continuously increasing depths create new challenges to master high remperature high pressure along with aggressive media like sour environments. In such applications where stainless steel is generally used, Hardiall® demonstrates excellent resistance to metal-to-metal wear. Thus providing a reduction of failures and hence maintenance downtimes.
For these applications Lebronze alloys integrated supply chain is able to propose ready-to-use products.

Automotive Racing Cars, Powertrain (valve guides, thrust washers, bearings, piston pins and rings,…)

Braking and Steering Systems (Brake caliper bushings, Steering bushings)
Hardiall® has a high strength and hardness, excellent machinability, maximum corrosion resistance and thushigh wear resistance under high loads, especially in critical lubrication conditions. Hardiall® is a key material for such technical issues. Motorsports, the forefront of innovation. Compared to conventional materials, Hardiall® enhances design optimization, with reduced mechanical clearances. It boosts performance and reliability, mainly used in powertrain, steering and braking systems.

Other applications

Many other developments in Defense, Industrial, Metallurgy, Renewable Energy and Ship Building.

Hardiall® offer: unlocking potential for high strength copper alloys

Based on your specific application Hardiall can offer thanks to its unique combination of surface and mechanical properties a technical and economical valid alternative Beryllium Copper, Nickel based Corrosion Resistant Alloys (CRAs), Titanium, Precipitation Hardening Steels, Stainless Steel and Manganese Bronzes

  • It is a material of choice for design engineers solving challenges for stringent requirements and environments, such as performance friction bushings and bearing cages
  • HARDIALL® complies with and exceeds the aerospace standards (AMS 4596, 4597, 4598, UT AMS 2154 class B…) as well as oil  & gas customers specifications and controls NACE MR0175-corrosion and UT API-6A par7.

Working closely with our partners, alongside customers, engineers and experts within the approval bodies, where we strive to exceed markets expectations

Lebronze alloys is willing to expand the applications of high strength alloys with this new Copper-Nickel-Tin product, along with existing Aluminum Bronzes and age hardening Copper-Nickel-Silicon alloys:

  • By delivering high-quality products and services
  • By developing new services such as alloys advisory for prescribers, co-design and TCO optimization with semi-finished or near-net-shape components.

Hardiall® benefits from a fully integrated manufacturing process and a global distribution network:

  • Lebronze alloys internal processes include casting, hot and cold working stages, heat treatments and non-destructive testing.  Being fully integrated ensures reactivity and complete traceability.
  • We span and support the complete supply chain from major OEMs all the way through to local machine shops offering local service along with a personable approach directly or thanks to our worldwide partners network.

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