C63020 Nickel Aluminum Bronze
C63020 Nickel Aluminum Bronze
Self-lubricating bronze bearings are engineered for applications where external lubrication is impractical. Solid lubricants are compressed and molded directly into the bearing to guarantee a maintenance-free product. No additional lubrication is necessary.
High-Performance C63020 Bronze for High-Temperature Applications
High-Performance C63020 Bronze Bushing for High-Temperature Applications
C63020 Nickel Aluminum Bronze Bushing (AMS 4590)
C63020 Nickel Aluminum Bronze, also known as Aluminium Nickel Bronze, is a high-strength, high-hardness copper alloy primarily composed of copper, nickel, and aluminum. It is widely used for applications that require superior mechanical properties, resistance to corrosion, and durability under challenging conditions. Below is a detailed description of C63020 Nickel Aluminum Bronze bushings:
1. Key Characteristics
- High Strength and Heat Resistance:
C63020 alloy has exceptionally high tensile strength, which is maintained even at elevated temperatures. The tensile strength can reach up to 110 ksi (approximately 758 MPa), with a yield strength of around 62 ksi (approximately 427 MPa). This makes it ideal for applications requiring both high strength and durability. - Excellent Corrosion Resistance:
The chemical composition of C63020 imparts outstanding resistance to corrosion, especially in marine environments. It can resist seawater and other corrosive media, thus prolonging the service life of components made from this material. - Good Thermal Conductivity and Stability:
C63020 has a thermal conductivity of approximately 30 W/mK and a low coefficient of thermal expansion. This allows it to maintain dimensional stability under temperature fluctuations, making it suitable for high-temperature applications or those requiring efficient heat transfer. - Good Machinability:
C63020 is easy to machine, weld, and form. It can be processed into complex shapes using mechanical machining, forging, and casting processes, and it retains its excellent properties even after welding.
2. Typical Applications
- Marine Engineering:
C63020’s excellent corrosion resistance makes it a preferred material in the marine industry. It is used in key components like propeller shafts, bearings, and other critical marine equipment. - Aerospace:
Due to its high strength and thermal stability, C63020 is used in the aerospace industry for manufacturing critical components such as jet engine bearings, thrust washers, and gears. - Industrial Equipment:
The alloy’s strength and wear resistance make it ideal for industrial applications like gears and bearings. It is also used in pumps, valves, and other components that need to withstand high stress and wear. - Heat Exchangers:
C63020’s good thermal conductivity and stability make it widely used in heat exchangers, where efficient heat transfer and dimensional stability are required.
3. Bushing Applications
In machinery and equipment, bushings are used to reduce friction, wear, and vibration while providing lubrication and support. C63020 Nickel Aluminum Bronze bushings stand out due to their high strength, corrosion resistance, and good machinability. The key benefits include:
- Wear Resistance:
The high hardness and wear resistance of C63020 allow its bushings to withstand high loads and friction, resulting in a longer service life. - Corrosion Resistance:
In corrosive environments, C63020 bushings can resist the degradation caused by corrosive media, maintaining their performance and structural integrity over time. - Adaptability:
C63020 bushings can be easily machined or forged into the required shapes and sizes to meet the specific needs of different applications.
4. Chemical Composition (According to ASTM 4590)
| Element | Cu% | Pb% | Sn% | Zn% | Fe% | Ni% | Al% | Co% | Cr% | Mn% | Si% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Min/Max | Rem | 0.03 | 0.25 | 0.30 | 4.00–5.50 | 4.20–6.00 | 10.00–11.00 | 0.20 | 0.05 | 1.50 | 0.15 |
Note: Cu + sum of named elements ≥ 99.5%
5. Mechanical Properties (According to AMS 4590)
- Tensile Strength:
- Up to 1″ diameter: Min 135 ksi (931 MPa)
- Over 1″ to 2″ diameter: Min 130 ksi (896 MPa)
- Over 2″ to 4″ diameter: Min 130 ksi (896 MPa)
- Yield Strength (0.2% Offset):
- Up to 1″ diameter: Min 100 ksi (689 MPa)
- Over 1″ to 2″ diameter: Min 95 ksi (655 MPa)
- Over 2″ to 4″ diameter: Min 90 ksi (621 MPa)
- Elongation: Minimum 6% in 2 inches (50.8 mm) or 4D.
- Rockwell Hardness:
- Min 26 HRC for all sizes.
6. Physical Properties
| Property | US Customary | Metric |
|---|---|---|
| Melting Point (Liquidus) | 1940–1967 °F | 1060–1075 °C |
| Density | 0.274 lb/in³ at 68 °F | 7.6 gm/cm³ at 20 °C |
| Specific Gravity | 7.6 | 7.6 |
| Electrical Resistivity | 132.33 ohms-cmil/ft at 68 °F | 22.0 microhm-cm at 20 °C |
| Thermal Conductivity | 31.2 Btu/sq ft/ft hr/°F at 68 °F | 54.0 W/m at 20 °C |
| Coefficient of Thermal Expansion | 9.4 · 10⁻⁶ per °F (68–572 °F) | 17.0 · 10⁻⁶ per °C (20–300 °C) |
7. Common Fabrication Processes
- Forging
- Hot Forming
- Machining
Summary
C63020 Nickel Aluminum Bronze is a high-performance alloy ideal for demanding applications in marine, aerospace, industrial equipment, and heat exchangers. Its excellent strength, corrosion resistance, and machinability make it particularly suited for bushings, gears, bearings, and other components that must endure high loads, wear, and harsh environments. This alloy provides long-term reliability and durability in critical applications.
