Material Research: CuZn25Al5Mn4Fe3 and 2.0966
Material Research: CuZn25Al5Mn4Fe3 and 2.0966
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Material Research: CuZn25Al5Mn4Fe3 and 2.0966
CuZn25Al5Mn4Fe3 (High-Strength Brass with Graphite)
•Base Material: High-strength brass (Manganese Bronze).
•Lubrication: Embedded solid lubricant (typically graphite).
•Coefficient of Friction (COF):
•Generally reported between 0.05 and 0.15 under stable sliding conditions.
•Starts higher (approx. 0.15-0.20) and drops as the graphite transfer film forms.
•Against hardened steel (HRC 40+), it typically achieves 0.05 – 0.10.
2.0966 (CuAl10Ni5Fe4 – Nickel Aluminum Bronze)
•Properties: High strength, excellent corrosion resistance (especially seawater), good wear resistance.
•Hardness: Typically 150 – 200 HB (Brinell).
•Equivalents: ASTM B148 C95800, BS1400 AB2.
Interaction and Compatibility
•Mating Material Requirement: Graphite-embedded bearings perform best against a hard counterpart (HRC 40+ / ~370 HB).
•2.0966 as Counterpart:
•2.0966 is a copper alloy. While hard for a bronze, it is significantly softer than hardened steel.
•Using two copper alloys together can sometimes lead to higher friction or galling if the transfer film is not maintained.
•However, aluminum bronze is often used as a sliding partner in specific environments.
•COF Requirement (<= 0.15):
•Most sources for CuZn25Al5Mn4Fe3 bearings claim a COF of < 0.15 for general applications.
•One specific source mentions 2.0966 as a counterpart with a low COF.
Technical Data from Manufacturer (Viiplus/Bronzelube)
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Property
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CuZn25Al5Mn4Fe3 (Grade 50#)
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CuAl10Ni5Fe5 (Grade 50S2)
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Hardness
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>= 210 HB
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>= 150 HB
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Tensile Strength
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>= 750 MPa
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>= 500 MPa
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|
Yield Strength
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>= 450 MPa
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>= 260 MPa
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|
Max. Temp.
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-40 ~ +300°C
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-40 ~ +400°C
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Max. Dynamic Load
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100 N/mm²
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50 N/mm²
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Max. Speed (Dry)
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15 m/min (0.25 m/s)
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10 m/min (0.16 m/s)
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•Note: The table shows that CuZn25Al5Mn4Fe3 is the higher-strength option compared to aluminum bronze (CuAl10Ni5Fe5).
•Friction Coefficient: While not explicitly in this specific table row, the general description for these graphite-embedded bearings on the same page states a low coefficient of friction and mentions compatibility with 2.0966 as a counterpart.
•Typical COF for Graphite Bearings: 0.05 – 0.15.
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