Hardiall® C72900
A wrought, spinodally-hardened copper-nickel-tin alloy engineered for the highest strength and toughness, a proven, lead- and beryllium-free substitute for CuBe2 beryllium copper.
✓ Lead-free · Beryllium-free · REACH / RoHSHigh strength + toughness
Up to 160 ksi tensile via controlled spinodal decomposition.
Wear & galling resistant
Resists galling, stress relaxation, corrosion and erosion.
Non-magnetic
Stable from −193 °F to 572 °F (−125 °C to +300 °C).
Easily machined
Machines into complex, thin-walled components (machinability index 65).
CuBe2 substitute
Matches beryllium-copper strength, safer, better surface.
Fully integrated supply
Cast to finished part in-house, full traceability.
Copper-Nickel-Tin Alloys.
Hardiall® is the very-high-strength CuNi15Sn8 member of Lebronze Alloys' wrought spinodal range. Its strength comes from a spinodal decomposition developed inside the alloy during a final controlled heat treatment, a process that can roughly triple the yield strength of the base metal while keeping the material ductile and machinable.
That combination lets Hardiall® stand in for beryllium copper (CuBe2) without the health and handling constraints of beryllium: comparable mechanical properties, superior surface behaviour and workability, and full REACH / RoHS compliance.
Because Lebronze Alloys is fully integrated (casting, hot and cold working, heat treatment and NDT all in-house), Hardiall® ships with complete traceability, as semi-finished bar, tube, rod and wire or as ready-to-use machined parts.
Minimum guaranteed properties.
| Grade / spec | Form | Tensile (ksi) | Yield 0.2% (ksi) | Elong. (%) | Hardness (HB) | Hardness (HRC) | Compliant with |
|---|---|---|---|---|---|---|---|
| TX 90 | Bar | 110 ksi | 90 ksi | 12 | 240 | 23 | — |
| TS 120 U | Bar | 120 ksi | 110 ksi | 15 | 245 | 24 | — |
| TX 105 | Bar | 120 ksi | 105 ksi | 6 | 262 | 27 | — |
| TX 110 | Bar | 127 ksi | 110 ksi | 6 | 277 | 30 | AMS 4596 |
| TX 110 | Tube | 131 ksi | 110 ksi | 8 | 277 | 30 | AMS 4598 |
| TS 130 | Bar | 140 ksi | 130 ksi | 10 | 245 | 24 | — |
| TS 160 U | Bar | 160 ksi | 150 ksi | 3 | 314 | 34 | AMS 4597 |
Data for information only, non-contractual. Request a certified datasheet for design allowables.
Physical properties
| Density | 8.94 g/cm³ |
| Electrical conductivity | 7.5 %IACS |
| Thermal conductivity | 38 W/m·K |
| Young's modulus | 130 GPa |
| Thermal expansion | 16.4 ×10⁻⁶/K |
| Magnetic permeability | 1.001 |
| Machinability index | 65 |
| NACE corrosion rating | 5 |
Nominal chemical composition
| Copper (Cu) | Balance |
| Nickel (Ni) | 14.5 – 15.5 % |
| Tin (Sn) | 7.5 – 8.5 % |
| Other elements, total | ≤ 0.5 % |
Norms & designations.
Aerospace
- AMS 4596 · bar / rod
- AMS 4597 · high-strength bar
- AMS 4598 · tube / hollow bar
Oil & Gas · Sub-sea
- NACE MR0175 / ISO 15156
Wrought · designations
- UNS C72900 / C729
- ASTM B505 · ASTM B929
- EN 12163 · CW355H
Forms & applications.
Bars & rods
Round, extruded and drawn bar (Ø ≤ 170 mm / 6.69″) and rod (Ø ≤ 35 mm / 1.38″) across the TX and TS tempers, standard stocked form for bushings, bearings and machined components.
Tubes & hollow bars
Hollow bar and tube qualified to AMS 4598, OD ≤ 235 mm / 9.25″, efficient near-net stock for sleeves, liners and large-bore bushings.
Wires
Drawn wire Ø ≤ 13 mm / 0.51″ for springs, contacts and small precision components.
Finished machined parts
Ready-to-use components machined in-house from the same heat, single-source traceability from casting to inspection report.
Actuation & landing gear
Bushings and bearings in landing-gear actuation, flight controls, and airframe attachment hardware.
Subsea & downhole
Wellhead controls, manifolds, ROV connectors, MWD/LWD components, valve trim and mud-pump parts in sour, high-pressure service.
Powertrain & chassis
Valve guides, piston-pin bushings, thrust washers, brake-caliper and steering bushings.
Test & connectivity
Test probes, pogo pins, RF connectors and precision watch components, high strength with stable, non-magnetic behaviour.
Heavy equipment
Bushings, bearings and wear pads in extrusion presses, rolling mills and high-load metallurgical equipment.
Drilling & earthmoving
Linkage bushings and bearings on excavators, tri-cone reamer thrust washers and drill-bit components.
Drop-in strength, without the beryllium.
Hardiall® C72900 matches CuBe2's mechanical performance with superior surface behaviour and no beryllium-handling constraints. Send your CuBe2 spec and we'll map it to the right Hardiall® temper.