Aluminum Bronze

Aluminum Bronze

Aluminum Bronze is a type of bronze alloy that contains aluminum as the primary alloying element in addition to copper. It is known for its high strength, excellent corrosion resistance, and good wear resistance. These properties make it suitable for various demanding industrial applications.

Composition:

  • Copper (Cu): Approximately 76-89%
  • Aluminum (Al): Approximately 5-11%
  • Other elements: May include iron (Fe), nickel (Ni), manganese (Mn), and silicon (Si) to enhance specific properties.

Grades

ASTM B 111 C60800:

ASTM standard specifying the composition and mechanical properties for aluminum bronze alloys.

ASME SB 111 C60800:

ASME standard specifying the requirements for aluminum bronze alloys.

EN 12451 CuAl15As:

European standard specifying the composition and properties for aluminum bronze alloys.

CW200G:

European designation for aluminum bronze alloys.

C61400 / C95400 / C61800 / C62300 / C62400:

Specific grades of aluminum bronze, each with slightly different compositions and properties tailored for various applications.

Properties:

  1. Corrosion Resistance:
    • Excellent resistance to corrosion in both seawater and industrial environments.
    • High resistance to oxidation and sulfidation at high temperatures.

  2. Mechanical Properties:
    • Tensile Strength: Typically around 600-800 MPa.
    • Yield Strength: Approximately 300-500 MPa.
    • Elongation: Generally around 15-30%, indicating good ductility.
    • Hardness: High hardness, with a typical Brinell hardness number (HB) of around 150-300.

  3. Wear Resistance:
    • High wear resistance, suitable for applications involving heavy loads and friction.
    • Good anti-galling properties, ideal for bearings and bushings.

  4. Machinability:
    • Moderate machinability, allowing for manufacturing and machining of complex components.
    • Can be cast, forged, and worked to various shapes.

  5. Thermal and Electrical Conductivity:
    • Moderate thermal conductivity, suitable for heat exchange applications.
    • Lower electrical conductivity compared to other copper alloys.

Applications:

  • Marine Hardware: Extensively used in marine hardware such as propellers, pumps, and valves due to its excellent corrosion resistance.

  • Bearings and Bushings: Commonly used in the production of bearings and bushings for heavy-duty applications.

  • Aerospace and Defense: Suitable for aerospace and defense components where high strength and corrosion resistance are critical.

  • Industrial Equipment: Used in various industrial equipment parts, including valve bodies, pump components, and gears.

  • Chemical Industry: Employed in the chemical industry for components exposed to corrosive environments.

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