NC4
An aluminium-nickel bronze (CuAl10Ni5Fe4, C63000) designed for the stringent needs of aerospace, high tensile strength and hardness, with resistance to sea-water corrosion, saline-mist and oxidation.
✓ Lead-free · REACH / RoHSHigh strength & hardness
High tensile strength and hardness across a range of tempers.
Sea-water & oxidation resistant
Resistant to sea-water corrosion, saline-mist and oxidation.
Marine grade
Proven nickel-aluminium bronze for marine and naval service.
Fully integrated supply
Cast to finished part in-house, full traceability.
Aluminium Bronzes (Cu-Al).
NC4 (CuAl10Ni5Fe4, UNS C63000 / CW307G / 2.0966) is an aluminium-nickel bronze specially designed to meet the stringent needs of the aerospace market, combining high tensile strength and hardness.
It resists sea-water corrosion, saline-mist and oxidation, and is supplied in various tempers as bar and hollow bar, used for rings, bushings and bearings in landing gears, and for marine distributor bodies, screws and forged parts.
Minimum guaranteed properties.
| Grade / spec | Form | Tensile (ksi) | Yield 0.2% (ksi) | Elong. (%) | Hardness (HB) | Hardness (HRC) | Compliant with |
|---|---|---|---|---|---|---|---|
| AMS 4640 | Bars | 100 ksi | 50 ksi | 10 | 187 | 12 | AMS 4640, CW307G, 2,0966, ASTM B124, ASTM B150 |
Data for information only, non-contractual. Request a certified datasheet for design allowables.
Physical properties
| Density | 7.6 g/cm³ |
| Electrical conductivity | 8 %IACS |
| Thermal conductivity | 40 W/m·K |
| Young's modulus | 125 GPa |
| Thermal expansion | 16 ×10⁻⁶/K |
| Magnetic permeability | 1.5 |
| Machinability index | 30 |
| NACE corrosion rating | 4 |
Norms & designations.
Aerospace
- AMS 4640
ASTM
- ASTM B124 · ASTM B150
Designations
- CuAl10Ni5Fe4
- UNS C63000 · CW307G · 2.0966
Forms & applications.
Bars & hollow bars
Bar and hollow bar up to Ø ≤ 10″ (254 mm), available in various tempers.