CuZn32Al5Ni3 Aluminum Nickel Brass: Properties, Composition & Bearing Applications

Meta Description: Discover the ultimate guide to CuZn32Al5Ni3 (Aluminum Nickel Brass). Learn about its chemical composition, high strength, excellent wear resistance, and applications in marine equipment and self-lubricating bearings.

What is CuZn32Al5Ni3?

CuZn32Al5Ni3 is a premium-grade Aluminum Nickel Brass (often categorized under High Tensile Brass or Marine Brass). By alloying traditional copper-zinc (brass) with aluminum (Al) and nickel (Ni), this material achieves extraordinary mechanical strength, exceptional wear resistance, and outstanding anti-corrosion properties.

It is widely utilized in heavy-duty engineering and marine environments, bridging the gap between standard tin bronzes and high-strength aluminum bronzes.

Chemical Composition of CuZn32Al5Ni3

The naming convention of CuZn32Al5Ni3 reflects its primary alloying elements. While standard manufacturing tolerances apply, the typical chemical composition is as follows:

• Copper (Cu): ≈ 60%

• Zinc (Zn): ≈ 32%

• Aluminum (Al): ≈ 5%

• Nickel (Ni): ≈ 3%

(Note: Actual compositions may vary slightly depending on specific casting or international standards.)

Key Material Characteristics

1. Exceptional High Strength

The addition of Aluminum and Nickel creates strong metallurgical phases within the alloy, making its tensile and yield strength significantly higher than standard brasses like CuZn37 or CuZn40.

• Tensile Strength (Rm): 600 ~ 850 MPa

• Yield Strength (Rp0.2): 300 ~ 600 MPa

• Hardness: 180 ~ 280 HB
  (Values depend on whether the material is in a cast, heat-treated, or machined state.)

2. Superior Wear Resistance

Thanks to the hard-phase strengthening effect of Al and Ni, CuZn32Al5Ni3 exhibits robust resistance to galling and scoring. This makes it an ideal material for environments involving heavy sliding friction.

3. Excellent Seawater Corrosion Resistance

When exposed to harsh environments, the Aluminum content forms a dense, protective oxide film, while the Nickel content drastically reduces the risk of dezincification. It performs exceptionally well in seawater environments, port machinery, and offshore equipment.

4. Great Cavitation Resistance

Because it resists fluid impacts and pressure variations, it is highly sought after for pump bodies, impellers, and marine propulsion systems.

Main Applications in the Industry

Due to its unique mechanical profile, CuZn32Al5Ni3 is widely used across various heavy industries:

• Worm gears and valve components

• Marine hardware and shipbuilding parts

• Pump and compressor components

• Wear parts for port and lifting machinery

Focus: CuZn32Al5Ni3 in the Self-Lubricating Bearing Industry

For manufacturers and engineers in the sliding bearing and bushing industry, CuZn32Al5Ni3 is a top-tier material choice. It is frequently specified for:

• High-Load Copper Sleeves: Handling extreme weights without deformation.

• Offshore & Marine Bearings: Resisting saltwater corrosion.

• Crane Sliding Bearings: Providing durability under heavy lifting stress.

• Construction Machinery Bushings: Ideal for pin bushings in excavators and loaders.

Material Comparison: Finding the Right Bronze Alloy

How does CuZn32Al5Ni3 compare to other common bearing alloys?

The Verdict: CuZn32Al5Ni3 is neither a standard Tin Bronze (CuSn) nor a typical heavy-duty Aluminum Bronze (CuAl). It is a specialized Aluminum Nickel Brass that offers a highly cost-effective balance of high tensile strength, good machinability, and marine-grade corrosion resistance.

Need Equivalent Standards or Custom Bearings?

If you have received engineering drawings or European technical specifications calling for CuZn32Al5Ni3, you might be looking for its exact DIN Werkstoff Nr. (Material Number), EN standard, SAE, ASTM, or Chinese equivalent.

As a professional manufacturer of self-lubricating bearings and heavy-duty bushings, we can help you match the exact material specs and produce high-quality custom parts for your project.

[Contact Us Today] to get a quote on CuZn32Al5Ni3 bushings or to consult with our metallurgical engineering team!