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High Tensile Brasses

High tensile brasses are copper-zinc alloys with small additions of other metals to enhance their properties.

High Tensile Brass Bearing Bushings

High Tensile Brass Bearing Bushings made from alloys like CuZn25Al5Mn4Fe3 and CuZn34Mn3Al2Fe1 are specialized copper-zinc (brass) alloys enhanced with additional elements to improve their mechanical and wear properties. These alloys are designed for applications requiring high strength, good wear resistance, and corrosion resistance, particularly in demanding environments such as bearings, bushings, and other mechanical components.

Key Features of These Alloys:

  1. Copper (Cu) and Zinc (Zn) Base:
    • The primary components are copper and zinc, forming the brass matrix.
    • The ratio of Cu to Zn determines the basic properties of the alloy.
  2. Aluminum (Al):
    • Improves strength, hardness, and corrosion resistance.
    • Forms a protective oxide layer on the surface, enhancing wear resistance.
  3. Manganese (Mn):
    • Increases strength, toughness, and work-hardening properties.
    • Enhances resistance to wear and fatigue.
  4. Iron (Fe):
    • Adds strength and improves grain structure.
    • Enhances wear resistance and load-bearing capacity.

Alloy Compositions:

  1. CuZn25Al5Mn4Fe3:
    • Copper (Cu): ~63% (remainder after other elements)
    • Zinc (Zn): ~25%
    • Aluminum (Al): ~5%
    • Manganese (Mn): ~4%
    • Iron (Fe): ~3%
    • This alloy is known for its high tensile strength, excellent wear resistance, and good corrosion resistance.
  2. CuZn34Mn3Al2Fe1:
    • Copper (Cu): ~60% (remainder after other elements)
    • Zinc (Zn): ~34%
    • Manganese (Mn): ~3%
    • Aluminum (Al): ~2%
    • Iron (Fe): ~1%
    • This alloy offers a good balance of strength, machinability, and wear resistance, with slightly lower aluminum and iron content compared to CuZn25Al5Mn4Fe3.

Applications:

  • Bearing Bushings: Ideal for high-load and high-wear environments.
  • Marine Components: Resistant to corrosion in seawater.
  • Industrial Machinery: Used in gears, valves, and other mechanical parts.
  • Automotive Components: Suitable for heavy-duty applications.

Advantages:

  • High Tensile Strength: Can withstand significant mechanical stress.
  • Wear Resistance: Excellent for applications involving friction and sliding contact.
  • Corrosion Resistance: Suitable for harsh environments, including marine applications.
  • Machinability: Can be easily machined into precise components.

Custom Bronze Bearings

  • Comparison of the Two Alloys:

    Property CuZn25Al5Mn4Fe3 CuZn34Mn3Al2Fe1
    Tensile Strength Higher Slightly Lower
    Wear Resistance Excellent Good
    Corrosion Resistance Excellent Good
    Machinability Good Better
    Typical Applications Heavy-duty bushings, high-stress environments General-purpose bushings, moderate-stress environments
Material Selection

CuZn25Al5Mn4Fe3 is an exceptionally hard material, ideal for highly demanding machine components. Its closest international standard is ASTM B505 C86300.

Custom Manufacturing Process

CuZn34Mn3Al2Fe1 high tensile brass is exceptionally hard, making it ideal for demanding machine elements. Its closest international standard is ASTM B505 C86200.

These alloys are commonly used in industries that prioritize durability, strength, and resistance to wear and corrosion. The selection between the two depends on specific application requirements, including load, environment, and desired lifespan.

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High tensile brass bearings are specialized components used in various mechanical applications where high strength, wear resistance, and durability are required. Brass, an alloy of copper and zinc, is known for its excellent machinability, corrosion resistance, and good bearing properties. When high tensile strength is needed, additional elements such as aluminum, manganese, iron, or nickel are often added to the brass alloy to enhance its mechanical properties.

Key Characteristics of High Tensile Brass Bearings:

  1. High Strength: The addition of alloying elements increases the tensile strength, making it suitable for heavy-duty applications.
  2. Wear Resistance: High tensile brass bearings exhibit excellent wear resistance, which is crucial for applications involving friction and load.
  3. Corrosion Resistance: Brass inherently resists corrosion, especially in marine and chemical environments.
  4. Low Friction: The material provides a low coefficient of friction, which is beneficial for bearing applications.
  5. Machinability: Brass is easy to machine, allowing for the production of precise and complex bearing designs.
  6. Thermal Conductivity: Good thermal conductivity helps in dissipating heat generated during operation.

Common Applications:

  • Marine Engineering: Used in propeller shafts, rudder bearings, and other components exposed to seawater.
  • Automotive Industry: Employed in bushings, thrust washers, and other high-stress components.
  • Industrial Machinery: Utilized in heavy machinery where high load-bearing capacity is required.
  • Aerospace: Applied in various components that require high strength and reliability.

Alloy Compositions:

High tensile brass alloys often include the following elements:

  • Copper (Cu): Primary base metal.
  • Zinc (Zn): Primary alloying element.
  • Aluminum (Al): Enhances strength and corrosion resistance.
  • Manganese (Mn): Improves strength and wear resistance.
  • Iron (Fe): Increases tensile strength and hardness.
  • Nickel (Ni): Enhances corrosion resistance and strength.

Examples of High Tensile Brass Alloys:

  1. Manganese Bronze (e.g., C86300): Known for high strength and excellent wear resistance.
  2. Aluminum Bronze (e.g., C95400): Offers high strength and good corrosion resistance.
  3. Nickel Aluminum Bronze (e.g., C95500): Provides superior strength and corrosion resistance, especially in marine environments.

Maintenance and Considerations:

  • Lubrication: Proper lubrication is essential to minimize wear and extend the life of the bearing.
  • Load Capacity: Ensure the bearing is rated for the specific load and operational conditions.
  • Environmental Factors: Consider the operating environment, such as exposure to corrosive substances or extreme temperatures.

High tensile brass bearings are a reliable choice for demanding applications where strength, durability, and resistance to wear and corrosion are paramount.