CuSn12 Tin Bronze Alloy Bearing Bushing
The provided information details the CuSn11Pb2 tin bronze bearing bushing alloy, which is commonly used in applications requiring good wear resistance, low friction, and high load-bearing capacity. Below is a summary of its chemical composition, mechanical properties, and physical properties:
Chemical Composition
| Element | % Min. | % Max. |
|---|---|---|
| Cu | 83.5 | 87.0 |
| Ni | – | 2.0 |
| P | – | 0.4 |
| Pb | 0.7 | 2.5 |
| Sn | 10.5 | 12.5 |
| Zn | – | 2.0 |
| Al | – | 0.01 |
| Fe | – | 0.20 |
| Mn | – | 0.20 |
| S | – | 0.08 |
| Sb | – | 0.2 |
| Si | – | 0.01 |
Mechanical Properties (Minimum Values)
| Property | Continuous (GC) | Centrifugal (GZ) |
|---|---|---|
| Tensile Strength (Rm, MPa) | 280 | 280 |
| Yield Point 0.2% (Rp0.2, MPa) | 150 | 150 |
| Elongation 5D (A, %) | 5 | 5 |
| Hardness (HBW 10-1000) | 90 | 90 |
Physical Properties
| Property | Value |
|---|---|
| Density (kg/dm³) | 8.7 |
| Specific Heat (J/(g·K)) | 0.373 |
| Thermal Expansion (10⁻⁶/K) | 18.6 |
| Thermal Conductivity (W/(m·K)) | 55 |
| Electrical Conductivity (MS/m) | 6.5 |
Key Features
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High Tin Content (10.5–12.5%): Provides excellent wear resistance and anti-friction properties.
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Lead Content (0.7–2.5%): Enhances machinability and acts as a solid lubricant.
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Zinc Content (≤2.0%): Improves strength and corrosion resistance.
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Applications: Commonly used in bushings, bearings, and other components subjected to high loads and sliding friction.
This alloy is suitable for both continuous casting (GC) and centrifugal casting (GZ) processes, with consistent mechanical properties across both methods.
CuSn11Pb2 tin Bronze Bearings
CuSn11Pb2 is a type of cast bronze alloy commonly used in the manufacturing of bearings, bushings, and other components that require good wear resistance, low friction, and self-lubricating properties. Here’s a breakdown of its key features and applications:
CuSn11Pb2 Bronze Alloy Properties:
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Composition:
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Copper (Cu): Base metal
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Tin (Sn): 11% (provides strength and wear resistance)
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Lead (Pb): 2% (improves self-lubricating properties and machinability)
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Key Characteristics:
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Self-Lubricating: The lead content reduces friction, making it suitable for applications where external lubrication is limited.
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Wear Resistance: Tin enhances the alloy’s durability and resistance to wear.
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Machinability: The lead content also improves machinability, making it easier to produce precision parts using CNC machining.
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Corrosion Resistance: Bronze alloys generally have good resistance to corrosion, especially in non-acidic environments.
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Load-Bearing Capacity: Suitable for moderate to high load-bearing applications.
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Applications:
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Bearings and Bushings: Widely used in self-lubricating bearings and bushings for machinery, automotive, and industrial equipment.
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CNC Machined Parts: Ideal for producing precision components like gears, sleeves, and fittings.
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High-Friction Environments: Suitable for applications where low friction and minimal maintenance are required.
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CNC Machining of CuSn11Pb2 Bronze Parts:
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Precision: CNC machining allows for the production of complex and high-tolerance parts.
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Surface Finish: The alloy can be machined to achieve a smooth surface finish, reducing the need for additional post-processing.
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Tooling: Use carbide or high-speed steel (HSS) tools for machining to ensure efficiency and precision.
Advantages of CuSn11Pb2 in Self-Lubricating Bushings:
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Reduced maintenance due to self-lubricating properties.
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Long service life in high-wear environments.
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Suitable for both rotary and sliding applications.
Industries Using CuSn11Pb2 Components:
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Automotive (e.g., bushings, bearings)
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Industrial machinery (e.g., conveyor systems, pumps)
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Marine (e.g., corrosion-resistant fittings)
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Aerospace (e.g., lightweight, durable components)
If you’re looking for CuSn11Pb2 cast bronze bushings or CNC-machined parts, ensure the supplier adheres to quality standards and provides material certifications to guarantee performance and reliability.
