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Exploring Tin Bronze Alloy C93200: The Ideal Choice for Bearing Bushings
Tin bronze alloys are renowned for their durability, making them ideal for industrial use. Alloy C93200, also known as SAE 660 or RG7, is a top choice for bearing bushings. This post explores the properties, uses, and benefits of C93200 tin bronze, highlighting its popularity in engineering.
Custom Thrust Bearings
What is C93200 Tin Bronze?
Alloy C93200, commonly known as SAE 660 or RG7, is a high-tin bronze primarily composed of copper with additions of tin, lead, and zinc. Renowned for its outstanding machinability and wear resistance, this alloy excels in high-friction and mechanical wear applications. Tin bronze combines high strength, toughness, and corrosion resistance, making it ideal for marine and industrial environments. Its versatility allows for tailored compositions to meet specific industry needs.
Features and Specifications
Tin bronze alloys, made of copper and tin, are known for their strength, durability, and corrosion resistance, making them ideal for gears, bushings, bearings, pump impellers, piston rings, and steam fittings. Custom formulations address various industry needs.
Key Properties of C93200
The C93200 alloy combines key advantages, including:
– Excellent machinability, enabling the production of complex, precise shapes without compromising bushing integrity.
– Superior hardness and strength, offering exceptional resistance to wear and deformation for high-load applications.
– Good corrosion resistance, ensuring durability even in challenging environments.
– High wear resistance, with self-lubricating properties from its tin and lead content that reduce wear in moving components.
Applications of C93200 Bearing Bushings
C93200 is widely used in various applications due to its strength and durability:
– Industrial Machinery: Ideal for gears, shafts, and hydraulic cylinder parts, it handles heavy loads effectively.
– Automotive: Commonly used for wear-resistant components like bushings in clutches, brakes, and steering assemblies.
– Marine Hardware: Its saltwater resistance makes it suitable for fittings and pump components in marine environments.
Other notable alloys include C93500 and C93700.
Available Sizes
- Special shapes (U/L/T)
- Bronze Bearing
- Flanged Bearings
Custom Parts, Advantages of Using C93200 in Bushings
Choosing C93200 for bearing bushings offers several advantages:
Longevity and Durability: C93200’s strong structure and wear resistance minimize replacements, ensuring long-term reliability.
Cost-Effectiveness: C93200 is economically advantageous due to its durability and low maintenance needs.
Versatility: With excellent machinability and adaptability to various conditions, C93200 is a versatile option across industries.
Partnering with Custom Parts, C93200 tin bronze
C93200 tin bronze, or SAE 660/RG7, is more than just an alloy; it’s a reliable, efficient, and economical solution for bearing bushings. Its excellent machinability, combined with superior mechanical properties, makes it an ideal choice for manufacturers looking to optimize performance and durability in their products. As industries continue to evolve, the enduring qualities of C93200 ensure that it remains at the forefront of bearing bushing materials, providing effective solutions across a wide range of applications.
For those in the market for durable, high-performance bearing bushings, consider C93200 tin bronze—an alloy that has stood the test of time and continues to exceed expectations in industrial applications around the globe.
Bearing bronze alloys, aluminum bronze alloys, tin bronze alloys, manganese bronze alloys, brass alloys, and copper alloys are all types of metal materials that are commonly used in various industrial applications, especially for bearings and other components that require high strength, durability, and resistance to wear and corrosion. Here’s a brief overview of each:
- Bearing Bronze Alloys: These are a class of bronze alloys specifically designed for bearing applications due to their excellent wear resistance, good lubrication properties, and high fatigue strength. They are often used in applications where there is a need for low friction and high load-bearing capacity.
- Aluminum Bronze Alloys: These alloys are known for their high strength, excellent corrosion resistance, and good conductivity. They are often used in marine environments, chemical processing, and for high-strength fasteners.
- Tin Bronze Alloys: Tin bronzes are characterized by their high strength, corrosion resistance, and good casting properties. They are commonly used in marine applications, decorative items, and for components that require good wear resistance.
- Manganese Bronze Alloys: Manganese bronzes are known for their high strength, excellent corrosion resistance, and good machinability. They are often used in heavy-duty marine applications and for high-strength components that require resistance to wear and corrosion.
- Brass Alloys: Brass is an alloy primarily composed of copper and zinc. It is valued for its acoustic properties, corrosion resistance, and ease of machining. Brass alloys are used in musical instruments, valves, and decorative items.
- Copper Alloys: Copper alloys are a broad category that includes not only brass but also other types of alloys such as cupronickel and silicon bronze. Copper alloys are known for their high thermal and electrical conductivity, corrosion resistance, and formability.
Each of these alloys has specific properties that make them suitable for different applications. The choice of alloy depends on the requirements of the application, such as the need for strength, corrosion resistance, wear resistance, or specific mechanical properties.
Alloy Types
- CuSn8
- CuSn9
- CuSn10
- CuSn12
- CuSn11Pb2
- CuSn12Ni2
- CuSn7Zn2Pb3
Tin bronze is a versatile alloy known for its outstanding mechanical properties and corrosion resistance, making it suitable for high-load, low-speed applications. It is ideal for manufacturing gears, bushings, bearings, pump impellers, piston rings, steam fittings, valve bodies, retainers, and connectors, as well as in electrical applications like relays and conductor springs.Best Uses
High-strength, low-speed, and heavy-load applications.
Custom parts are designed and manufactured to meet specific requirements of an application, ensuring optimal performance and functionality. Here are some features commonly found in custom parts, particularly in the context of bearings and related components:
- Graphite Plugged Bronze Bushings: These are bushings made from bronze with graphite plugs. The graphite provides a self-lubricating feature, which is beneficial in applications where lubrication is difficult or infrequent.
- Oil/Grease Grooves: Custom parts may include grooves specifically designed to hold and distribute oil or grease. This ensures that the bearing surfaces are adequately lubricated to reduce friction and wear.
- Flanges: Flanges are extended surfaces on the part that provide a larger area for mounting or attaching other components. They can be custom designed to fit specific applications and provide a secure and stable connection.
- Wear Plates: These are additional components that can be added to protect the main bearing surfaces from excessive wear. They are often made from wear-resistant materials and can be replaced when worn out, extending the life of the main component.
- Graphite Plugs: Similar to graphite plugged bronze bushings, graphite plugs can be used in various custom parts to provide self-lubrication and reduce the need for external lubrication systems.
- Thrust Washers: These are washers designed to handle axial loads in a bearing assembly. They can be custom made to fit specific dimensions and load requirements, ensuring proper load distribution and preventing damage to the bearing.
- Large Diameter Bearings: Custom parts may include large diameter bearings that are designed to support heavy loads and operate in environments where standard bearings may not suffice. These bearings are often tailored to the specific load, speed, and environmental conditions of the application.
When designing custom parts, engineers consider various factors such as material selection, dimensional accuracy, tolerances, surface finishes, and compatibility with the existing system. The goal is to create a part that not only meets the specific functional requirements but also integrates seamlessly with the rest of the system for optimal performance and longevity.
Tin Bronze
Primarily used in gears, high-strength bushings, and bearings, tin bronze alloys are suited for applications involving high strength, low speeds, and heavy loads. They are also utilized in pump impellers, piston rings, steam fittings, and valve bodies, as well as in movable bridge components and turntables. Alloys in this category include C90300, C90500, C90700, C90800, C90810, C91000, C91100, C91300, C91600, and C91700.
| NO. | DIN | Material No. | Designation | ASTM Standard | Proportional | Density (g/cm³) | 0.2% Strain (MPa) | Tensile Strength (MPa) | Strain (%) | E-modulus (MPa) | Hardness (HB) | Applications |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 01 | 1705 | 2.1090.01 | CuSn7ZnPb | B 584 | Cu 81 – 85, Sn 6 – 8, Zn 3 – 5, Pb 5 – 7 | 8.8 | 120 | 240 | 15 | 106,000 | 65 | Widely utilized in automotive, aerospace, and marine engineering for components requiring good strength and corrosion resistance. Recognized internationally for versatility and performance. |
| 2.1090.03 | CuSn7ZnPb | B 271 | Cu 81 – 85, Sn 6.3 – 7.5, Zn 2 – 4, Pb 6 – 8 | 8.8 | 130 | 270 | 13 | 106,000 | 75 | |||
| 2.1090.04 | CuSn7ZnPb | B 505 | Cu 81 – 85, Sn 6.3 – 7.5, Zn 2 – 4, Pb 6 – 8 | 8.8 | 120 | 270 | 16 | 106,000 | 70 | |||
| 02 | 1705 | 2.1061.01 | CuSn12Pb | Not yet standardized | Cu 84 – 87, Sn 11 – 13, Pb 1 – 2 | 8.7 | 140 | 260 | 10 | 112,000 | 80 | Commonly used in manufacturing bearings, bushings, and components that require high load capacity and wear resistance, especially in marine and industrial applications. |
| 2.1061.03 | CuSn12Pb | Not yet standardized | Cu 85 – 88, Sn 10 – 12, Pb 1 – 1.5 | 8.7 | 150 | 280 | 5 | 112,000 | 90 | |||
| 2.1061.04 | CuSn12Pb | B 505 | Cu 85 – 88, Sn 10 – 12, Pb 1 – 1.5 | 8.7 | 140 | 280 | 7 | 112,000 | 85 | |||
| 03 | 1714 | 2.0975.01 | CuAl10Ni | B 584 | Cu min. 75, Al 8.5 – 11.0, Ni 4.0 – 6.5, Fe 3.5 – 5.5 | 7.6 | 270 | 600 | 12 | 122,000 | 140 | Used in marine, aerospace, and heavy machinery for manufacturing bearings and components requiring high strength and durability. Known for extreme loads and high corrosive environments. |
| 2.0975.02 | CuAl10Ni | B 30 | Cu min. 75, Al 8.5 – 11.0, Ni 4.0 – 6.5, Fe 3.5 – 5.5 | 7.6 | 300 | 600 | 14 | 122,000 | 150 | |||
| 2.0975.03 | CuAl10Ni | B 271 | Cu min. 75, Al 8.5 – 11.0, Ni 4.0 – 6.5, Fe 3.5 – 5.5 | 7.6 | 300 | 700 | 13 | 122,000 | 160 | |||
| 2.0975.04 | CuAl10Ni | B 505 | Cu min. 75, Al 8.5 – 11.0, Ni 4.0 – 6.5, Fe 3.5 – 5.5 | 7.6 | 300 | 700 | 13 | 122,000 | 160 | |||
| 04 | 1709 | 2.0598.01 | CuZn25Al5 | B 584 | Cu 60 – 67, Al 3 – 7, Fe 1.5 – 4, Mn 2.5 – 5, Zn rest | 8.2 | 450 | 750 | 8 | 115,000 | 180 | Used in heavy-duty bearings, hydraulic components, and marine hardware. Designed for high loads and resistance to corrosive attack. |
| 2.0598.02 | CuZn25Al5 | B 30 | Cu 60 – 66, Al 5 – 7.5, Fe 2 – 4, Mn 2.5 – 5, Zn 22 – 28 | 8.2 | 480 | 750 | 8 | 115,000 | 180 | |||
| 2.0598.03 | CuZn25Al5 | B 271 | Cu 60 – 66, Al 5 – 7.5, Fe 2 – 4, Mn 2.5 – 5, Zn 22 – 28 | 8.2 | 480 | 750 | 5 | 115,000 | 190 | |||
| 05 | 1705 | 2.1052.01 | CuSn12 | Not yet standardized | Cu 84 – 88, Sn 11 – 13, Pb 1, Ni 2.0, Sb 0.2, P 0.2 | 8.6 | 140 | 260 | 12 | 110,000 | 80 | Commonly used in manufacturing bearings, gears, and components requiring high wear resistance. Known for good machinability and corrosion resistance, particularly in seawater environments. |
| 2.1052.03 | CuSn12 | Not yet standardized | Cu 85 – 88, Sn 10 – 12, Pb 1 – 1.5 | 8.6 | 150 | 280 | 8 | 110,000 | 90 | |||
| 2.1052.04 | CuSn12 | Not yet standardized | Cu 85 – 88, Sn 10 – 12, Pb 1 – 1.5 | 8.7 | 140 | 280 | 8 | 110,000 | 95 |
Note: Delivery form codes: .01 = sand casting, .02 = gravity casting, .03 = centrifugal casting, .04 = continuous casting.
Technical Specification: CuSn12Ni Tin-Nickel Bronze Casting (Cast Tin Bronze)
Material Overview
CuSn12Ni is a nickel-modified cast tin bronze alloy (historically termed “gunmetal”), classified as a bearing/bushing/slider-grade tin bronze. Enhanced by nickel, it significantly improves the wear resistance and corrosion resistance of traditional tin bronzes, making it ideal for high-load, high-wear, and corrosive environments.
Key Properties & Advantages
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Chemical Composition (Typical)
Element Content Range (%) Copper (Cu) 84–87 Tin (Sn) 11–13 Nickel (Ni) 1.5–2.5 Others* ≤0.5 (Fe, P, S, Pb, Zn, Sb, etc.) -
Mechanical Properties
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Tensile Strength: ≥300 MPa
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Yield Strength: ≥180 MPa
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Elongation After Fracture: ≥8%
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Hardness: ≥100 HBW (Brinell Hardness)
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Physical Properties
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Density: 8.6 g/cm³
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Corrosion Resistance: Exceptional resistance to seawater, cavitation erosion, and acidic media.
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Primary Applications
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Heavy-Duty Machinery: High-load clutch sliders, heavy-duty moving nuts, high-speed turbine worm gears.
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Fluid Handling Systems: High-pressure valves, pump casings, impellers, hydroturbine blades.
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Marine Engineering: Seawater pump bearings, propeller bushings, guide wheels.
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Industrial Wear Components: Mining machinery liners, high-temperature wear-resistant bushings.
International Equivalent Materials
| Standard | Grade/Designation | Remarks |
|---|---|---|
| China GB | CuSn10P1 (non-direct equivalent) | No CuSn12Ni in GB/T 1176-1986; often substituted with CuSn10P1 in designs. |
| U.S. ASTM | C90800 | ASTM-approved grade for comparable applications. |
| Europe EN | CuSn12Ni2-C (CC484K) | Complies with DIN EN 1982-2008 for cast tin-nickel bronzes. |
Performance Advantages
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vs. Standard Tin Bronzes: Nickel refines grain structure, enhancing fatigue resistance and high-temperature stability for extended service life.
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vs. Aluminum Bronzes/Brasses: Superior seawater corrosion resistance, ideal for marine and offshore applications.
Manufacturing & Processing Guidelines
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Casting Methods: Sand casting/centrifugal casting; controlled cooling rates required to minimize segregation.
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Post-Processing: Surface hardening (e.g., nitriding) recommended for improved wear resistance.
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Weldability: TIG welding with preheating (200–300°C) advised to prevent cracking.
Summary
CuSn12Ni excels in balancing strength, corrosion resistance, and wear resistance, making it a critical engineering material for heavy industry, marine systems, and chemical processing. Its performance surpasses traditional bronzes in extreme operational conditions, offering reliable solutions for demanding mechanical and corrosive environments.
Manufacturing on Demand
