CuSn10Pb10 Bronze Bushing
CuSn10Pb10 Bronze Bushing
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.
CuSn10Pb10 Bronze Bushing – 10% Tin, 10% Lead for Maximum Durability
CC495K CuSn10Pb10 Tin Bronze Bushing Overview
Standard: CC495K
Symbol: CuSn10Pb10-C
The CuSn10Pb10 tin bronze bushing, categorized under EN Casting Copper Alloys, is a bronze alloy composed primarily of copper, tin, and lead. Known for its excellent mechanical properties and corrosion resistance, this alloy is widely used in applications requiring wear resistance and durability. Below is a detailed introduction to the CuSn10Pb10 bronze bushing:
Material Properties
- Chemical Composition: CuSn10Pb10 bronze contains approximately 10% tin, 10% lead, and 80% copper. The addition of tin enhances hardness and wear resistance, while the lead improves castability and lubricity without compromising copper’s natural conductivity and thermal properties.
- Physical Properties: The density of CuSn10Pb10 bronze is around 8.8 g/cm³, and it has a melting point of approximately 900°C. The thermal expansion coefficient is 17×10^-6/°C, ensuring stable performance across varying environmental conditions.
- Mechanical Properties: At room temperature, the tensile strength of CuSn10Pb10 bronze is between 200-250 MPa, and the yield strength ranges from 120-180 MPa. Its high hardness and wear resistance make it an ideal material for wear-resistant parts and friction components.
Applications
Due to its excellent performance, CuSn10Pb10 bronze bushings are widely used in the following industries:
- Marine Industry: CuSn10Pb10 bronze bushings are commonly used in propellers and bearings in shipbuilding to withstand high loads and harsh seawater environments.
- Electronics and Electrical Industry: With good conductivity and thermal properties, this bronze alloy is utilized in electrical contacts, wires, and cables.
- Automotive Industry: CuSn10Pb10 bronze bushings are applied in engines, transmissions, and other components, improving wear resistance and extending the lifespan of automotive parts.
- Machinery Manufacturing: The alloy is used in various transmission systems and friction components in mechanical manufacturing, enhancing overall performance and reliability.
Manufacturing Process
The production of CuSn10Pb10 bronze bushings involves smelting, casting, and machining. By precisely controlling the melting temperature, time, and material ratios, the alloy is formed into a homogeneous melt of copper, tin, and lead. Suitable casting techniques are then used to shape the alloy into bushings, followed by machining processes to achieve accurate dimensions and surface roughness.
In conclusion, CuSn10Pb10 bronze bushing is a high-performance material with broad application potential and market demand due to its superior properties.
CuSn10Pb10 bronze bushing
Standards and Composition:
- EN 1982 CC495K
- CuSn10Pb10-C
Chemical Composition:
| Element | Composition (%) |
|---|---|
| Cu | 79.00-82.00 |
| Sn | 9.00-11.00 |
| Pb | 8.00-11.00 |
| Zn | Max 0.8 |
| Fe | Max 0.7 |
| Ni | Max 0.5 |
| Sb | Max 0.5 |
| P | Max 1.5 |
| S | Max 0.08 |
| Al | N/A |
| Mn | Max 0.005 |
| Si | Max 0.005 |
Mechanical Properties:
- Tensile Strength: Min 35 Ksi (241 MPa)
- Yield Strength: Min 20 Ksi (138 MPa)
- Elongation: Min 6% (in 2in or 50mm)
- Brinell Hardness: Min 55
Can CuSn10Pb10 be used in high-temperature applications
Thermal Properties:
- Melting Point: The melting range of CuSn10Pb10 is between 820°C (solidus) and 930°C (liquidus). This relatively low melting point suggests that the alloy may struggle to maintain its structural integrity at elevated temperatures.
- Maximum Operating Temperature: For mechanical applications, the maximum recommended operating temperature is around 140°C (290°F). Beyond this limit, the mechanical properties of the alloy may degrade, increasing the risk of failure in demanding environments.
- Thermal Conductivity: CuSn10Pb10 has a thermal conductivity of approximately 48 W/m·K, which provides moderate heat dissipation. However, this level of conductivity may not be sufficient for high-temperature applications where rapid heat transfer is critical.
Applications and Limitations:
While CuSn10Pb10 excels in applications that require good machinability, wear resistance, and corrosion resistance—such as bearings and bushings—it is not ideal for high-temperature environments, such as those found in automotive or aerospace applications. The presence of lead, which enhances machinability, further limits its use in high-temperature scenarios due to lead’s low melting point and the potential for leaching under heat.
Conclusion: CuSn10Pb10 is best suited for moderate temperature applications. Its use in high-temperature environments should be avoided to ensure safety and performance integrity.
