C92500 Bronze Bushing
C92500 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.
C92500 Bronze Bushing – C92500 Leaded Tin Bronze manufacturer, SAE 640
C92500, also known as SAE 640 Tin Bronze or Leaded Tin Bronze, is a widely used copper alloy favored for bushings and bearings due to its impressive mechanical properties and ease of machining. Comprising roughly 88% copper, 10-12% tin, and 1-1.5% lead, C92500 is an ideal choice for a range of industrial applications.
Key Properties of C92500 Bronze Bushings
- High Strength and Wear Resistance: The tin content in C92500 enhances its durability and wear resistance.
- Excellent Machinability: The addition of lead improves machinability, making it easier to cut and finish.
- Corrosion Resistance: Suitable for marine and other corrosive environments.
- Versatile Manufacturing Options: Available in centrifugal cast, continuous cast, and sand cast forms, providing flexibility in production.
Applications of C92500 Bronze Bushings
C92500 bronze bushings are commonly used in high-speed and light-duty applications such as:
- Washers
- Bushings
- Bearings
- Fittings
- Pump Impellers
- Fixtures
The alloy’s combination of strength, wear resistance, and machinability makes it a popular choice in industries like automotive, manufacturing, and agriculture.
Installation and Maintenance of C92500 Bronze Bushings
Split bronze bushings made from C92500 Lead Tin Bronze are designed with a break or gap along their length, allowing for easy installation and removal without needing to disassemble surrounding machinery, which reduces downtime and maintenance costs.
Installation involves aligning the bush halves around the shaft and securing them with screws or clamps. Regular maintenance includes periodic inspection for wear and lubrication to ensure long-lasting performance.
Conclusion
C92500 Tin Bronze is a reliable and versatile material for bushings and bearings, offering a balance of strength, wear resistance, corrosion resistance, and machinability. Its availability in various forms and ease of installation make it a go-to choice for many industrial applications.
C92500 bronze bushing
Comparison of C92500 and C93200 Bronze Alloys
When selecting a bronze alloy for bushings or bearings, it’s important to consider how C92500 compares with other alloys like C93200 in terms of durability, mechanical properties, and typical use cases.
Mechanical Properties:
- C92500 (Tin Bronze):
- Tensile Strength: ~35,000 psi
- Yield Strength: ~18,000 psi
- Elongation: ~10%
- Brinell Hardness: 80 HB
- C93200 (Leaded Tin Bronze):
- Tensile Strength: ~34,800 psi
- Yield Strength: ~18,100 psi
- Elongation: ~20%
- Brinell Hardness: 85 HB
Composition:
- C92500 contains approximately 88% copper, 10-12% tin, and 1-1.5% lead. This combination offers good corrosion resistance and moderate wear resistance.
- C93200 has a higher lead content (7-15%), which improves its machinability and self-lubricating properties, making it suitable for applications with high speed and light loads.
Durability in Applications:
- C92500 is recognized for its good wear resistance and is often used in environments where moderate strength and corrosion resistance are essential, such as marine applications and general-purpose bushings.
- C93200, commonly referred to as the “workhorse” of bearing bronzes, excels in durability, especially in conditions involving high loads and speeds. Its higher lead content allows it to perform well in applications with frequent movement and friction.
Conclusion:
While both C92500 and C93200 are durable and reliable materials for various applications, C93200 typically offers superior durability due to its higher lead content, which enhances its wear resistance. C92500 remains an excellent choice for applications where a balance of strength, corrosion resistance, and moderate wear resistance is required.
Specifications and Standards for C92500 Bronze
C92500 is governed by several standards and specifications to ensure consistent quality and performance:
- Equivalent Specifications: ASTM B505, SAE J461, SAE J462
- Chemical Composition:
- Copper (Cu): 85.00-88.00%
- Tin (Sn): 10.00-12.00%
- Lead (Pb): 1.00-1.50%
- Nickel (Ni): 0.80-1.50%
- Zinc (Zn): 0.50% max
- Iron (Fe): 0.30% max
- Phosphorus (P): 0.20-0.30%
Machinability: C92500 has a machinability rating of 30 and a density of 0.317 lb/in³ at 68 °F.
Mechanical Properties (per ASTM B505):
- Tensile Strength: Minimum 40 ksi (276 MPa)
- Yield Strength: Minimum 24 ksi (165 MPa) at 0.5% extension under load
- Elongation: Minimum 10% over 2 inches (50 mm)
- Brinell Hardness: Typical 80 BHN
Physical and Thermal Properties:
- Density: 0.317 lb/in³ at 68 °F (8.7 gm/cm³ at 20 °C)
- Modulus of Elasticity in Tension: 16000 ksi (110000 MPa)
- Specific Heat Capacity: 0.09 Btu/lb/°F at 68 °F (377.1 J/kg at 20 °C)
- Incipient Melting Point: 600 °F (316 °C)
Fabrication and Welding:
- Soldering: Excellent
- Brazing: Good
- Oxyacetylene Welding, Gas Shielded Arc Welding, Coated Metal Arc Welding: Not recommended due to the risk of hot cracking.
| Material Type | Code | Standard | Composition | Max Allowable Composition | Specification | Density (g/cm³) | Hardness (HB) | Strength (MPa) | Elongation (%) | Temperature Range (°C) | Max Load (MPa) | Wear Resistance | Comments |
| High-tension Brass | 2.0598.01 | 1709 | Cu 60-67, Al 3-7, Fe 1.5-4, Mn 2.5-5 | Ni 3 | B 584 | 8.2 | 180 | 115 | 19 | 20°C-400°C | 450 | >300 | High-tension brass bushings are designed for demanding applications requiring high strength and durability. |
| 2.0598.02 | Gk-CuZn25Al5 | 180 | 480 | ||||||||||
| 2.0598.03 | GZ-CuZn25Al5 | B 271 | 190 | 480 | |||||||||
| Aluminium Bronze | 2.0975.01 | 1714 | Cu min.76, Al 8.5-11.0, Ni 4-6.5 | Mn 3.0 | B 584 | 7.6 | 140 | 122 | 18.8 | 20°C-400°C | 270 | >300 | Excellent wear resistance and self-lubricating properties, suitable for heavy loads and harsh environments. |
| 2.0975.02 | GK-CuAl10Ni | B 271 | 150 | 300 | |||||||||
| 2.0975.03 | GZ-CuAl10Ni | 160 | 300 | ||||||||||
| Lead-bronze | 2.1061.01 | 1705 | Cu 84-87, Sn 11-13, Pb 1-2 | Ni 2.0, Sb 0.2, P 0.2 | B 584 | 8.7 | 80 | 112 | 18.5 | 20°C-300°C | 140 | >220 | Excellent choice for toggle mechanism bushings in injection molding machines due to self-lubricating properties. |
| 2.1061.03 | GZ-CuSn12Pb | Ni 0.8-1.5 | 90 | 150 | |||||||||
| 2.1061.04 | GC-CuSn12Pb | B 505 | 85 | 140 | |||||||||
| Bronze | 2.1052.01 | 1705 | Cu 84-88.5, Sn 11-13, Ni max.2 | 8.6 | 80 | 112 | 18.5 | 20°C-300°C | 140 | >220 | Commonly used for bearings and bushings with excellent wear and corrosion resistance. | ||
| 2.1052.03 | GZ-CuSn12 | 95 | 150 | ||||||||||
| Leaded Bronze | 2.1090.01 | 1705 | Cu 81-85, Sn 6-8, Zn 3-5, Pb 5-7 | Ni 2.0, Sb 0.3 | B 584 | 8.8 | 65 | 106 | 18.5 | 20°C-300°C | 120 | >220 | Leaded tin bronze known for excellent wear resistance and machinability, widely used in casting. |
| 2.1090.03 | GZ-CuSn7ZnPb | B 271 | 75 | 130 | |||||||||
| 2.1090.04 | GC-CuSn7ZnPb | B 505 | 70 | 120 |
Summary
C92500 Tin Bronze is an excellent material for bushings and bearings, providing a balanced combination of strength, wear resistance, and machinability. It is particularly well-suited for environments that require corrosion resistance and moderate wear properties, such as marine applications. Its comparison with C93200 highlights its strengths and its suitability for specific use cases, ensuring that you can select the best material for your needs.
