Ningbo Jintian Copper (Group) Co., Ltd.
Ningbo Jintian Copper (Group) Co., Ltd.

Grade Name

CuZn20Al2As (also known as Aluminum Brass with Arsenic)


Product Features

  • Excellent Corrosion Resistance: Particularly suitable for seawater and high-salinity environments.

  • High Strength and Hardness: Enhanced by aluminum and arsenic additions.

  • Good Wear Resistance: Ideal for high-friction applications.

  • Superior Thermal Conductivity: Suitable for heat exchange applications.

  • Antimicrobial Properties: Arsenic addition provides antimicrobial benefits, making it suitable for specific environments.


Common Product Forms and Specifications

Product Form

Specification Range

Remarks

Rods

Diameter: 5mm - 200mm

Custom lengths available

Plates

Thickness: 0.5mm - 50mm

Width: 100mm - 1000mm

Tubes

Outer Diameter: 10mm - 150mm

Wall Thickness: 1mm - 10mm

Wires

Diameter: 0.1mm - 10mm

Supplied in coils or straight lengths

Castings

Customized as per customer requirements

Suitable for complex parts


Chemical Composition

Element

Content (%)

Remarks

Copper (Cu)

76.0 - 79.0

Main component

Zinc (Zn)

19.0 - 21.0

Main alloying element

Aluminum (Al)

1.5 - 2.5

Enhances strength and corrosion resistance

Arsenic (As)

0.02 - 0.06

Improves corrosion resistance and antimicrobial properties

Lead (Pb)

≤ 0.05

Impurity control

Iron (Fe)

≤ 0.3

Impurity control

Others

≤ 0.5

Total impurities


Physical Properties

Property

Value Range

Remarks

Density (g/cm³)

8.2 - 8.5

Moderate

Melting Point (°C)

900 - 920

Suitable for high-temperature environments

Thermal Conductivity (W/m·K)

120 - 130

Good thermal conductivity

Electrical Conductivity (% IACS)

25 - 30

Moderate

Thermal Expansion Coefficient (10⁻⁶/K)

20 - 22

Suitable for environments with temperature variations


Mechanical Properties

Property

Value Range

Remarks

Tensile Strength (MPa)

450 - 550

High strength

Yield Strength (MPa)

220 - 280

Good ductility

Elongation (%)

15 - 25

Suitable for forming

Hardness (HB)

130 - 160

Good wear resistance

Impact Toughness (J/cm²)

50 - 70

Suitable for dynamic load environments


Core Advantages

  • Superior Corrosion Resistance: Especially in seawater and high-salinity environments.

  • High Strength and Hardness: Enhanced by aluminum and arsenic additions.

  • Good Wear Resistance: Suitable for high-friction applications.

  • Antimicrobial Properties: Arsenic addition provides antimicrobial benefits.

  • Environmental Friendliness: Low lead content, complies with environmental standards.


Product Applications

  • Marine Engineering: Used in seawater desalination equipment, ship components, and heat exchangers.

  • Chemical Industry: Suitable for corrosion-resistant pipes, valves, and pump bodies.

  • Power Industry: Used in condenser tubes and heat exchangers.

  • Automotive Industry: Used in bearings, bushings, and connectors.

  • Healthcare: Suitable for antimicrobial applications in specific environments.


Processing Precautions

  • Machining: Use high-speed steel or carbide tools with cooling lubrication.

  • Welding Performance: Argon arc welding or brazing is recommended; avoid overheating to prevent performance degradation.

  • Surface Treatment: Polishing, electroplating, or coating can enhance corrosion resistance.

  • Storage Environment: Avoid contact with acidic or alkaline substances; keep dry and ventilated.


Main Application Scenarios

  • Marine Engineering: Seawater desalination equipment, ship components, and heat exchangers.

  • Chemical Industry: Corrosion-resistant pipes, valves, and pump bodies.

  • Power Industry: Condenser tubes and heat exchangers.

  • Automotive Manufacturing: Wear-resistant bearings, bushings, and connectors.

  • Healthcare: Antimicrobial applications in specific environments.


Frequently Asked Questions

Q1: How is the corrosion resistance of CuZn20Al2As?

A1: CuZn20Al2As has excellent corrosion resistance, particularly in seawater and high-salinity environments.


Q2: Is this material suitable for high-temperature environments?

A2: CuZn20Al2As has a high melting point (900-920°C) and can be used in high-temperature environments, but prolonged exposure may degrade performance.


Q3: How difficult is it to process CuZn20Al2As?

A3: This material has good machinability and ductility, making it easy to process and suitable for various forming techniques.


Q4: How environmentally friendly is CuZn20Al2As?

A4: The material has low lead content, complies with environmental standards, and is suitable for industries with high environmental requirements.


Standard References

  • International Standard: ISO 426-1 (Chemical composition and properties of copper-zinc alloys).

  • Chinese Standard: GB/T 5231 (Chemical composition and product forms of wrought copper and copper alloys).

  • American Standard: ASTM B36 (Standard specification for brass plate, sheet, strip, and rolled bar).