Manganese Bronze

Manganese Bronze is a type of bronze alloy that contains manganese as one of its key alloying elements. It is known for its high strength, toughness, and good resistance to corrosion, making it suitable for demanding industrial applications. Manganese bronze alloys are used in applications where high strength, resistance to wear, and good machinability are required.

Composition:

Copper (Cu): Typically around 55-65%
Manganese (Mn): Typically 2-5%
Aluminum (Al): Typically 9-11%
Iron (Fe): Typically 2-4%
Nickel (Ni): Typically 2-6%
Other elements: Small amounts of zinc (Zn), lead (Pb), and tin (Sn).

Grades

C63000 / C63020 / C63200 / C95510 / C95500 / C95520 / CuAl10Ni5Fe4 / CW307G / C95800 / C96900:

ASTM standards specifying the composition and mechanical properties for different grades of manganese bronze.

Properties:

Corrosion Resistance:
- Good resistance to corrosion in various environments, including seawater and industrial atmospheres.
- Better resistance to stress corrosion cracking compared to other bronzes.
Mechanical Properties:
- Tensile Strength: Typically around 620-880 MPa.
- Yield Strength: Approximately 200-550 MPa.
- Elongation: Generally around 10-25%, indicating good ductility.
- Hardness: High hardness, with a typical Brinell hardness number (HB) of around 150-300.
Wear Resistance:
- Excellent wear resistance, suitable for applications involving high loads and friction.
- Good anti-galling properties, ideal for bearings and bushings.
Machinability:
- Good machinability, allowing for the manufacturing and machining of complex components.
- Can be cast, forged, and worked to various shapes.
Thermal and Electrical Conductivity:
- Good thermal conductivity, suitable for heat exchange applications.
- Moderate electrical conductivity, sufficient for many industrial uses but lower than pure copper.

Applications:

Bearings and Bushings: Extensively used in the production of bearings and bushings due to its high wear resistance and low friction properties.
Marine Hardware: Suitable for marine hardware such as propellers, pumps, and valves due to its excellent corrosion resistance.
Gears and Heavy-Duty Machinery: Used in gears, heavy-duty machinery, and equipment parts that require high strength and wear resistance.
Industrial Equipment: Employed in various industrial equipment parts, including pump components, connectors, and fasteners.
Aerospace and Defense: Utilized in aerospace and defense industries for components requiring high strength, toughness, and corrosion resistance.