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Silicon Bronze Bushing – Self-Lubricating Bronze Bearing Material – Tech Up
Silicon Bronze Bushings Are Self-Lubricating. We Specialize In Customized High-Performance, High-Volume, Low-Value Self-Lubricating Bearing Projects And Custom Bronze Bushing Solutions. We Help Clients Save Costs And Improve Efficiencies With Our Bearing Technology.
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Silicon bushing bronze is used for manufacturing a wide range of products across various industries due to its excellent properties, including strength, corrosion resistance, formability, and attractive coloration. As a leading manufacturer of self-lubricating bronze bushing bearings in China, we offer a wide range of bushings sizes and configurations to meet your needs. Our bronze bearings are made using advanced production techniques and are rigorously tested for quality and performance. Contact us today to start importing our silicon bronze bushing bearings for your business.
What is silicon bronze？
Silicon bronze bushings bronze is a type of copper alloy that contains significant amounts of silicon and smaller amounts of other elements such as zinc, tin, and manganese. The addition of bushing bronze silicon to the copper alloy provides several benefits, including improved strength, corrosion resistance, and increased casting fluidity.
Silicon bronze bearing bushings are often used in applications that require high strength and durability, such as marine hardware, electrical components, etc.
The Power of Bronze Bushings: Unlocking Performance with Silicon Aluminum Bronze and Silicon Bronze
In the world of industrial machinery, reliable bushings and bearings are non-negotiable. They are the unsung heroes who ensure smooth operation, reduce friction, and extend equipment lifespan. At www.bearingface.com, we specialize in high-performance bronze solutions, particularly custom Silicon Aluminum Bronze and Silicon Bronze bushings and bearings.
When you choose to import aluminum bronze bearings from our China-based manufacturing facility, you gain access to top-quality products at competitive prices, backed by our extensive custom manufacturing capabilities. Contact us today to explore how we can elevate your machinery’s performance.
1. Why Choose Silicon Aluminum Bronze for Your Bushings?
Silicon Aluminum Bronze, specifically alloys like C64200 (CuAl7Si2), offers an exceptional blend of strength, corrosion resistance, and wear characteristics. This makes it a preferred choice for demanding applications where traditional bearing materials often fall short.
Composition (C64200 – CuAl7Si2):
| Element | Cu | Al | Si |
| % | Bal | 6.3-7.6 | 1.5-2.2 |
Typical Mechanical Properties (C64200 – HR50):
| Form | Size Range (Imperial) | Size Range (Metric) | Yield 0.2% (Ksi) | Yield 0.2% (MPa) | UTS (Ksi) | UTS (MPa) | Elong % | Hardness (HB) |
| HR50 | >2-3” | >50-80mm | 35-37 | 240-255 | 75-90 | 515-620 | 15-35 | 120-150 |
| HR50 | >3-4” | >80-100mm | 30-35 | 205-241 | 70-80 | 485-551 | 15-40 | 120-150 |
| M10 | >4” | >100mm | 25-40 | 170-276 | 70-80 | 485-551 | 15-40 | 120-150 |
Applications of C64200 Silicon Aluminum Bronze Bushings:
C64200 silicon aluminum bronze bushings are engineered for heavy-duty environments. Their robust nature makes them ideal for:
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Marine Industries: Exceptional resistance to seawater corrosion and erosion.
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Mining Operations: Withstanding high loads and abrasive conditions.
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Oil and Gas: Performing reliably in challenging, often corrosive, environments.
These bushings excel in high-load and high-speed applications, providing superior performance where other materials might fail.
How Silicon Bronze Achieves Self-Lubrication:
Silicon provides intrinsic lubricity, significantly reducing friction and wear. This is particularly beneficial in harsh conditions like marine, chemical processing, or heavy-duty industrial settings. The self-lubricating mechanism can be inherent to the alloy’s microstructure or further enhanced by embedding solid lubricants like graphite, ensuring a truly maintenance-free performance.
3. General Material Analysis of Silicon Bronze
Definition and Composition:
Silicon bronze typically contains over 96% copper, with silicon content ranging from 2-4%. Other elements such as zinc, manganese, iron, and tin are added to optimize specific performance characteristics. Silicon is the primary alloying element, boosting strength, corrosion resistance, and imparting its renowned self-lubricating qualities.
Physical and Mechanical Properties:
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Density: 8.53-8.83 g/cm³
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Hardness: Rockwell 51, Brinell 80-120
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Tensile Strength: 70,000-90,000 psi (approx. 480-620 MPa)
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Corrosion Resistance: Excellent against acids, alkalis, seawater, and various chemicals, forming a protective oxide layer.
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Self-Lubricating Properties: Silicon promotes a low-friction surface, making it ideal for bearing applications. It also exhibits good thermal conductivity and moderate electrical conductivity.
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Other Features: Non-magnetic, highly machinable, and fatigue resistant.
Advantages in Self-Lubricating Bearings:
Silicon bronze bearings offer exceptional wear and corrosion resistance, thriving in lubrication-free environments such as pumps, valves, and marine components. Their high strength supports medium to high loads, while their inherent self-lubricating nature drastically reduces maintenance costs.
4. Detailed Alloy Grade Analysis for Self-Lubricating Bearings
Below is an analysis of common Silicon Bronze alloy grades (based on UNS standards), focusing on their application in self-lubricating bearings. The diversity in grades primarily stems from variations in silicon content and additional elements, which impact strength, corrosion resistance, and self-lubricating performance. We prioritize grades most relevant to bearing applications.
| Alloy Grade | UNS Number | Main Composition (Typical) | Key Properties | Application & Analysis in Self-Lubricating Bearings |
| C64200 | C64200 | Cu 90-92%, Si 1.5-2.2%, Al 6.3-7.6% | High strength, heat & corrosion resistant; high hardness, easily forged. | Used for high-load bearing bushings; silicon provides self-lubrication, aluminum enhances wear resistance, ideal for aerospace/marine maintenance-free bearings. |
| C65100 | C65100 | Cu 98.5%, Si 0.8-2.0%, Zn ≤1.5% | Medium strength, good electrical conductivity, corrosion resistant; lower silicon reduces cost. | Common in electrical bearings, bushings, and valves; moderate self-lubrication, suitable for low to medium friction environments like pump shaft bearings. |
| C65500 | C65500 | Cu 94.8%, Si 2.8-3.8%, Mn 0.5-1.3% | High strength (tensile >550 MPa), excellent corrosion & fatigue resistance; high silicon enhances self-lubrication. | Ideal self-lubricating bearing material for heavy machinery/marine; high silicon reduces friction, resists seawater corrosion, can be enhanced with graphite. |
| C65620 | C65620 | Cu 96%, Si (major), Fe (added) | High strength, corrosion resistant, self-lubricating; easily machinable, DFARS compliant. | Specifically for aerospace bearing cages, raceways, spacers; iron enhances strength, silicon provides excellent bearing load capacity, self-lubricating reduces wear. |
| C69430 | C69430 | Cu 80-83%, Si 3.5-4.5%, Zn (bal) | High hardness, wear & corrosion resistant; zinc improves fluidity. | Used for industrial bearings and bushings; high silicon for self-lubrication, zinc enhances castability, suitable for medium-high load self-lubricating parts. |
| C87300 | C87300 | Cu 94%, Si 3.5-4.5%, Mn 0.8-1.5% | Good castability, corrosion resistant, high strength. | Cast self-lubricating bearings; high silicon promotes low friction, suitable for valve/pump bearings. |
| C87400 | C87400 | Cu 82-85%, Si 2.5-4.0%, Zn 12-16% | Medium strength, corrosion resistant, easily cast. | Economical self-lubricating bushings; zinc lowers cost, silicon provides basic self-lubrication, for general machinery bearings. |
| C87500 | C87500 | Cu 82%, Si 3-5%, Zn 12-16% | High corrosion resistance, good strength, strong castability. | For self-lubricating bearings in corrosive environments, e.g., chemical equipment; high silicon enhances self-lubrication and acid resistance. |
| C87600 | C87600 | Cu 88-92%, Si 3.5-5.5%, Zn 4-7% | Balanced strength and corrosion resistance. | General-purpose self-lubricating components; suitable for medium-load bearings, higher silicon content improves friction performance. |
| C87850 | C87850 | Cu 75-78%, Si 2.7-3.4%, Zn (bal) | Lead-free, high wear & corrosion resistance. | Eco-friendly self-lubricating bearings; low lead for regulatory compliance, high silicon for self-lubrication, suitable for automotive/food machinery. |
Important Considerations:
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C65100 and C65500 are among the most common silicon bronze alloys used for bearings. Note that “C65000” (if encountered) likely refers to a variant of C65100 or a specific specification with similar composition (Cu + Si + Zn + Mn), offering medium strength and moderate self-lubrication.
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When selecting an alloy, consider the specific application requirements: high silicon content (e.g., C65500) is best for demanding environments, while lower silicon (e.g., C65100) offers a more economical solution.
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Enhanced Self-Lubrication: Silicon bronze bearings are often further enhanced by embedding solid lubricants like graphite or PTFE, which can reduce the coefficient of friction to below 0.1 and significantly extend operational life.
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Choosing the right bronze alloy for your bushings and bearings can dramatically impact the efficiency and longevity of your equipment. At www.bearingface.com, we are committed to providing tailor-made solutions that meet the highest standards of quality and performance. Discover our premium lubricating silicon bronze bushing bearings, delivered globally. Download our latest self-lubricating bearings catalog today and contact us for more information.
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