Properties and Composition of Bronze Alloys

Alloy Grades and Characteristics

This table presents a detailed comparison of the properties and compositions of various bronze alloy materials, highlighting key mechanical and physical characteristics essential for their application in engineering and manufacturing contexts.

Special Bronze Alloys Our selection includes bronze alloys specifically designed for applications like molds for glass or embossing, marine tube accessories, and components for valves and terminals.

Common Bearing Bronze Alloys
C93200 (SAE 660): Known for its excellent anti-friction properties, strength, and hardness, making it a popular general-purpose bearing alloy.
C86300: Contains higher tin content, offering improved strength and hardness, suitable for applications requiring wear resistance and high load-carrying capacity.
CuSn6Zn6Pb3 (JDB-2): A high-tin bronze alloy with solid lubrication and graphite impregnation, providing self-lubricating capabilities and adaptability in various industrial applications.
C95400: May include aluminum or nickel to enhance corrosion resistance and strength, suitable for harsh environments such as marine or chemical industries.

ASTM B22 C91100 Tin Bronze Chemical and Mechanical Properties

Chemical Composition of C91100 Tin Bronze

Mechanical Properties (Measured at 68°F / 20°C)

Physical Properties

• Melting Point – Liquidus: 1742°F
• Melting Point – Solidus: 1505°F
• Electrical Conductivity: 8% IACS at 68°F
• Specific Heat Capacity: 0.09 Btu/lb/°F at 68°F
• Modulus of Elasticity in Tension: 15,000 ksi

This table presents a comprehensive overview of the essential chemical and mechanical properties of C91100 tin bronze, following ASTM B22 specifications, suitable for applications requiring durability and resistance to wear.

Bronze Alloy Bearing Materials

Bronze
Material No.: CuSn7Zn4Pb7 (CC493K)
Standard: EN 1982
DIN: RG7 DIN 1705 2.1090
Description: RG7 or gunmetal
Chemical Analysis: Cu 81.0 – 85.0, Sn 5.4 – 8.0, Zn 2.0 – 5.0, Pb 5.0 – 8.0, Ni max 2.0, P max 0.10
Applications: Offers good sliding and dry running properties with excellent machinability. Available in various sizes and alloys upon request.

Aluminium Bronze
Material No.: CuAl10Fe5Ni5 (CC333G)
Standard: EN 1982
DIN: DIN 1714
Description: CuAl10Fe5Ni5-C | CuAl10Ni
Chemical Analysis: Cu 76.0 – 83.0, Al 8.5 – 10.5, Ni 4.0 – 6.0, Fe 4.0 – 6.0, Mn max 3.0
Applications: Known for high mechanical strength across a range of temperatures. Offers excellent corrosion and seawater resistance. Ideal for aggressive environments.

Material No.: CuAl10Ni5Fe4 (CW307G)
Standard: EN 1982
DIN: DIN 17665, 17672
Description: CuAl10Ni5Fe4
Chemical Analysis: Cu rest, Al 8.5 – 11.0, Ni 4.0 – 6.0

Lead-bronze
Material No.: CuSn10Pb10 (CC495K)
Standard: EN 1982
DIN: DIN 1716
Description: CuSn10Pb10-C | CuPb10Sn
Chemical Analysis: Cu 78.0 – 82.0, Pb 8.0 – 11.0, Sn 9.0 – 11.0, Ni max 2.0, Zn max 2.0, Sb max 0.5
Applications: High lead content enhances dry running properties and lowers hardness. Remains operational above 200°C. Suitable for high surface pressure applications, acid resistance, and possible water lubrication use.

Brass
Material No.: CuZn25Al5Mn4Fe3-C (CC762S)
Standard: EN 1982
DIN: DIN 1709, Alloy number CC762S 2.0598
Description: Standard CuZn25Al5, 2.0598
Chemical Analysis: Cu 60.0 – 67.0, Zn rest, Al 3.0 – 7.0, Fe 1.5 – 4.0, Mn 2.5 – 5.0, Ni max 3.0
Applications: High-tension brass offering excellent mechanical values and wear resistance. Capable of withstanding cold and hot processing.

Phosphor Bronze
Material No.: CuSn8 (CW453K)
Standard: EN 12163
DIN: DIN 17662, 17672, Alloy number CW453K 2.1030
Description: Phosphor Bronze
Chemical Analysis: Cu rest, Sn 7.5 – 8.5, P 0.01 – 0.4, Fe max 0.1, Ni max 0.2, Pb max 0.02, Zn max 0.2
Applications: Known for high wear resistance and load capacity. Corrosion and seawater proof, excellent heat conductivity, suitable for high-temperature applications.

When selecting a bearing bronze alloy, consider the following factors:

• Application Environment: Different environmental conditions such as temperature, humidity, and chemical exposure will influence the choice of alloy.
• Load Requirements: Choose alloys with appropriate strength and hardness based on the type and magnitude of loads the components will endure.
• Processing Requirements: Consider the alloy’s processing properties, including casting, machining, and heat treatment capabilities.
• Cost-effectiveness: Balance the cost of the alloy with its performance and processing difficulty to meet budget and performance requirements.

By understanding the unique properties and applications of bearing bronze alloys, you can select the most suitable material for your specific needs, ensuring optimal performance and longevity in demanding industrial environments.

Leaded Tin Bronze
Leaded tin bronze alloys contain lead between 7% and 15%, facilitating excellent machinability and maintaining favorable thermal conductivity and lubricity due to the lead. The alloy C93200 is a primary choice in this category, extensively utilized across various bearing applications. Relevant alloys include C92200, C92300, C93200, C92700, and C92800.

Leaded Red Brass
Commonly used in plumbing, leaded red brass alloys are notable for their cost-effectiveness combined with impressive machining and casting qualities. Alloy C84400 is a popular choice, known for its ability to ensure pressure tightness. These alloys are also applied in low-cost bearings under minimal load conditions. Included are C83600, C83800, C84200, C84400, C84800, and C85700.

Manganese Bronze
Manganese bronze alloys are capable of operating under very high loads and speeds but require consistent lubrication for bearing applications. With excellent mechanical strength and good corrosion resistance, C86300 serves as the standard high-tensile alloy in this group, containing copper, manganese, aluminum, and iron. Other alloys in this series are C86200 and C86500.

Aluminum Bronze
Known for the highest strength among standard copper-based alloys, aluminum bronze features prominently in SinoBronze’s offerings, including C95400, C95500, and C95900 in various shapes like rounds, tubes, and rectangles. Alloys like C95500 utilize aluminum alongside iron and nickel as strengtheners and can undergo heat treatment for enhanced tensile strength. Additional alloys in this category are C95200, C95300, C95410, C95800, and C95900.

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.

High-Leaded Tin Bronze
These alloys contain between 7% and 30% lead, offering superior machinability, thermal conductivity, and lubricity. They excel in bearing applications prone to lubrication loss and in environments laden with contaminants like dirt. Their malleable nature allows them to encapsulate foreign particles, protecting mating parts from wear. This group includes C93400, C93500, C93600, C93700, C93800, C93900, C94000, C94100, and C94300.

Nickel Silver Bronze
Nickel silver, or nickel brass, alloys blend copper, nickel, and zinc, prized for their attractive silver luster. These alloys, with moderate strength and good corrosion resistance, are employed in food and beverage handling equipment, decorative hardware, electroplated tableware, and musical instruments. Cast alloys range from C97300 to C97800.

Additional classifications include Phosphor Copper Alloys, Copper Zinc Alloys, Selenium Bronze Alloys, Silicon Bronze Alloys, Yellow Brass Alloys, Phosphor-Copper-Tin Alloys, and Copper-Aluminum Alloys, each with specific codes denoting different compositions and applications.

The C91100 tin bronze centrifugal casting components have extensive applications in industrial manufacturing due to their outstanding performance advantages. In addition to the well-known properties such as excellent corrosion resistance, good machinability, and superior electrical and thermal conductivity, this material also offers several notable benefits.

Firstly, C91100 tin bronze centrifugal castings exhibit exceptional wear resistance. In high-speed or high-load working environments, the surface remains resistant to wear, ensuring prolonged stable operation. This characteristic makes it particularly suitable for equipment and components that require frequent motion or long-term operation.

Secondly, C91100 tin bronze centrifugal castings possess excellent strength and toughness. The centrifugal casting process ensures a dense internal structure while achieving high strength and toughness. As a result, these castings maintain stability and reliability when subjected to impacts and vibrations.

Additionally, C91100 tin bronze centrifugal castings offer good weldability and machinability. The material can be welded with various metals, facilitating assembly and connection during the manufacturing process. Its favorable machining properties also contribute to more efficient and flexible production.

Lastly, C91100 tin bronze centrifugal castings have strong environmental performance. They do not release harmful substances during manufacturing or use, making them environmentally friendly. This characteristic aligns with the modern industry’s focus on environmental protection and sustainability.

In conclusion, the C91100 tin bronze centrifugal castings stand out due to their excellent wear resistance, strength, toughness, weldability, machinability, and environmental attributes, making them highly valuable in industrial manufacturing applications.

Technical Data: JIS Copper Alloy Casting Standards & Global Equivalents

Engineers and procurement specialists use this data to ensure material compliance across international projects. Whether you are replacing a legacy BC6 part or specifying a new CAC304 high-load bushing, this chart serves as your primary reference.

Mechanical Properties & International Cross-Reference Table

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Key Insights for Material Selection

1. Ultra-High Load Applications: CAC304 (HBSC4)

With a tensile strength of 755 

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 and hardness over 200 HB, CAC304 is the premier choice for heavy-duty bearings. It corresponds to ASTM C86300. This material is used where extreme pressure support is required, such as in bridge supports or heavy hydraulic machinery.

2. The “Workhorse” Bronze: CAC406 (BC6)

Commonly known as “85-5-5-5” or Gunmetal, CAC406 is the most versatile alloy for general bushings and valves. Its balanced properties make it easy to machine and resistant to moderate corrosion. Its global equivalent is ASTM C83600.

3. The Best Bearing Bronze: CAC603 (LBC3)

For applications where lubrication might be inconsistent, CAC603 (High Leaded Tin Bronze) provides excellent anti-seizure properties. The high lead content creates a self-lubricating effect that protects the shaft. It is the JIS equivalent to ASTM C93700.

4. Marine & Chemical Resistance: CAC703 (ALBC3)

Aluminum Bronze CAC703 is designed for the toughest environments. With a high hardness (150 HB) and excellent resistance to seawater corrosion and cavitation, it is widely used in marine propulsion and offshore oil and gas equipment.

Conclusion

Selecting the right copper alloy is a balance of mechanical strength (Tensile/Hardness) and environmental suitability (Corrosion/Lubrication).

• Need the highest strength? Choose CAC304.

• Need a reliable general bushing? Choose CAC406.

• Need high-speed emergency running? Choose CAC603.

[Contact our Engineering Team] for custom casting and machining services based on JIS, ASTM, and DIN standards.