C63000 Nickel Aluminium Bronze – AMS 4640 / CDA 630
Spec Equivalents: AMS 4640 “G”, SAE J463, SAE J461, QQ-C-465B, ASME SB150, ASTM B-150, B-124, B-171, B-283
C63000 (AMS 4640 – CDA 630) Aluminium Bronze alloy is an excellent choice for applications involving heavy loads, abrasive wear resistant, friction, abrasive wear and corrosion. The addition of nickel increases the alloys strength without diminishing its excellent ductility, toughness and corrosion resistance. Typical applications for C63000 nickel aluminum bronze included aircraft landing gear components, strut bearings, main pistons, trunnion bearings and similar vital components.
Chemical Composition
| Element | Content (%) |
| Copper, Cu | 82 |
| Aluminium, Al | 10 |
| Nickel, Ni | 5 |
| Iron, Fe | 3 |
Typical Uses for C63000 Nickel Aluminum Bronze:
INDUSTRIAL: Hydraulic Bushings for Earth Moving Equipment, Corrosion Resistant Articles, Bushings, Bearings, Heat Exchanger Flanges, Heat Exchanger Headers, Tanks, Valve Balls, Structural Members, Pump Shafts, Aircraft Parts, Valve Guides, Plunger Tips, Welded Piping Systems, Balls, Gears, Cams, Pump Parts, Shafting, Condenser Tube for Power Stations and Desalting Units, Valve Seats
MARINE: Pump Parts, Bolts, Nuts, Propellers, Ship Propellers
PLUMBING: Faucets
Mechanical Properties
The mechanical properties of copper UNS C63000 are tabulated below.
| Properties | Metric | Imperial |
| Tensile strength | 760 MPa | 110000 psi |
| Yield strength | 470 MPa | 68200 psi |
| Elongation at break (in 50 mm, 10% reduction in area) | 10% | 10% |
| Elastic modulus | 117 GPa | 17000 ksi |
| Poisson’s ratio | 0.34 | 0.34 |
| Reduction of area (at 316°C/601°F, cold finished) | 9% | 9% |
| Shear modulus | 44.0 GPa | 6380 ksi |
| Fatigue strength (at number of cycles 1.00e+8, reverse bending) | 255 MPa | 37000 psi |
| Hardness, Rockwell B | 94 | 94 |
| Machinability (UNS C36000 (free-cutting brass) = 100) | 30 | 30 |
Thermal Properties
Key Features
- Very good strength and toughness
- High resistance to corrosion and erosion
- Retention of properties at cryogenic temperatures
- Excellent resistance to shock, wear and abrasion
- Spark resistance
- Good fabrication and welding properties
