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Forms and sizes available

  • Bars typically up to 10″ Dia
  • Hollow Bars typically up to 10″ OD

Hardiall® | C72900 | CuNi15Sn8 | AMS 4596 | AMS 4597 | AMS 4598 – High Strength Spinodal Copper Nickel Tin Alloy

ISO Composition: CuNi15Sn8

UNS/Norms: C72900 | C729 | AMS 4596 | AMS 4597 | AMS 4598 | ASTM B505 | ASTM B929 | EN 12163 | CW355H | NACE MR0175

Equivalent: Toughmet 3® | Pfinodal

Hardiall ® | CuNi15Sn8 | C72900 key properties

Hardiall® is a wrought spinodal 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 environmentally friendly with both lead and beryllium free. Hardiall ® | CuNi15Sn8 | C72900 is used within several industries thanks to its outstanding physical and mechanical properties in many different components.

Hardiall ® | CuNi15Sn8 | C72900 is a direct equivalent to Toughmet® 3 and is an ideal proven track record solution. Extensive testing ensures that Hardiall ® | CuNi15Sn8 | C72900 is in full compliance with the relevant specifications: in that regard, using Hardiall ® | CuNi15Sn8 | C72900 can help high-end industries mitigate their supply chain risks.

Hardiall ® | CuNi15Sn8 | C72900 is an ideal substitute to CuBe2 Beryllium Copper. Hardiall ® | CuNi15Sn8 | C72900 achieves similar mechanical properties as well as superior surface properties and workability.

In Aerospace, Hardiall ® | CuNi15Sn8 | C72900 complies with AMS 4596, AMS 4597, AMS 4598 and UT AMS 2154 class B norms.

In Oil & Gas, Hardiall ® | CuNi15Sn8 | C72900 complies with NACE MR0175, ASTM B505, and ASTM B929 norms.

Hardiall ® | CuNi15Sn8 | C72900 is manufactured by Lebronze alloys and benefits from a fully integrated production process from casting to finishing.

Hardiall ® | CuNi15Sn8 | C72900 applications


Hardiall ® | CuNi15Sn8 | C72900 is widely used in actuation systems, friction bushings and bearings for primary and secondary flight controls, wheels and brakes and various aircraft systems attachments.

Hardiall ® | CuNi15Sn8 | C72900, as Toughmet® and Pfinodal® alloys, is compliant with main Aerospace’s Customer specifications namely : BS 5849, ABS 5152, BMS 7-373 Class 90 Class 100 Class TS.
MTL 4112

Oil and Gas

Hardiall ® | CuNi15Sn8 | C72900 is used in Onshore Artificial lift sucker rods, valve guide couplings
Hardiall ® | CuNi15Sn8 | C72900 can also be used as Offshore Subsea Wellhead Controls, Manifold, Mud Pumps, LWD and MWD Components, HDD tools, drill bit, bearings, bushings, thrust washers, ROV hydraulic connectors, Valves components Trim.

Hardiall ® | CuNi15Sn8 | C72900, as Toughmet® and Pfinodal® alloys, is compliant with main Oil and Gas’ Customer specifications namely : 22-000119-03, CU07 CU08, MS013, WN 135, 6000062, MS 145, 100082256, 100679610, M 40131C, 50 2L 50 2D


Hardiall ® | CuNi15Sn8 | C72900 has applications in Heavy Mining Equipment and Vehicles excavators, haul trucks, mining shovel and draglines, continuous miners Pivot Bushings and Bearings, Tri-Cone Rock Bit Roller Cone, Reamers HDD Tools Bushings, Thrust Washers.


Hardiall ® | CuNi15Sn8 | C72900 also has high-performance applications in Racing Cars, Passenger Vehicles Powertrain Components (valve guides, plain bearings, bushings), Braking and Steering Systems (Brake calliper bushings, Steering bushings).

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