CW306G is a high-strength aluminum bronze alloy with copper as the base metal, incorporating aluminum, iron, and manganese, and is classified as CW306G according to the EN standard with the chemical composition code CuAl10Fe3Mn2. Due to its excellent mechanical properties and stability in marine environments, CW306G is widely used in industries such as shipbuilding, petrochemical, power generation, and construction machinery, where high wear and corrosion resistance are required.

1. Material Composition and Structural Features
The typical chemical composition of CW306G is as follows:

• Aluminum (Al)：9.0 – 11.0%

• Iron (Fe)：2.0 – 4.0%

• Manganese (Mn)：1.5 – 3.5%

• Nickel (Ni)：≤ 1.0%

• Silicon (Si)：≤ 0.20%

• Zinc (Zn)：≤ 0.50%

• Lead (Pb)：≤ 0.05%

• Tin (Sn)：≤ 0.10%

• Copper (Cu)：Remainder

• The alloy’s strength and hardness are greatly enhanced by solid solution strengthening with aluminum, while iron and manganese further improve its wear resistance and structural stability.

2. Performance Advantages Overview

（1）Excellent Mechanical Properties
The typical mechanical properties of CW306G (depending on the supply condition and processing method) are as follows:

• Ultimate Tensile Strength (Rm)：590 – 690 MPa

• Yield Strength (Rp0.2)：330 – 510 MPa

• Elongation (A50)：6 – 12%

• Brinell Hardness (HB)：140 – 180

• These values indicate that CW306G combines high strength with a certain level of plasticity, making it suitable for high-load and high-friction conditions.

（2）Outstanding Corrosion Resistance

CW306G exhibits excellent corrosion resistance in seawater, salt spray, and various industrial atmospheres. Unlike ordinary brass, it does not suffer from dezincification corrosion, making it an ideal marine alloy.

（3）Good Wear and Fatigue Resistance
CW306G contains finely dispersed strengthening phases within its structure, ensuring stable performance under sliding friction and impact loads. It is particularly suitable for manufacturing bearings, bushings, gears, and other wear-prone components.

（4）Strong High-Temperature Stability
At temperatures around 400°C, CW306G maintains good strength and oxidation resistance, making it suitable for heat exchangers, valve components, and other high-temperature operating conditions.

3.Processing and Usage Recommendations

• Machinability：Medium (about 50% of easy-cutting brass)

• Welding Performance：Good (suitable for TIG/MIG welding)

• Forgability：Excellent, suitable for hot forging and cold working

• Heat Treatment：Generally not strengthened by heat treatment, primarily relies on alloy strengthening and strain hardening

• Precautions: CW306G is not suitable for oxy-acetylene welding due to potential loss of aluminum from high-temperature oxidation.

4. Typical Application Areas
CW306G is widely used in the following high-demand conditions:

• Marine and Offshore Engineering: Propellers, shaft sleeves, rudder components, ship valves

• Mechanical and Hydraulic Systems: Sliding bearings, bushings, pump bodies, valve seats

• Chemical Equipment: Corrosion-resistant pipes, heat exchanger components

• Energy Equipment: Turbines, wind turbine flanges, nuclear power condenser parts

• Fasteners and Structural Components: High-strength nuts, washers, connectors

5. International Standards and Corresponding Grades

• EN：CW306G

• DIN：2.0936

• ISO：CuAl10Fe3Mn2

• UNS：C62300 / C62500 (approx.)

• ASTM：B150, B124 (applicable for certain specifications)

• AMS：4631, 4634 (military specifications)

6. Conclusion

CW306G aluminum bronze plays a vital role in modern engineering with its outstanding comprehensive properties. Whether in the extreme marine environments of propellers or in high-speed, high-friction industrial bearings, CW306G demonstrates its reliability, durability, and cost-effectiveness.

7. About Suzhou Bolaibao Metal
Suzhou Bolaibao Metal specializes in the research and supply of high-performance copper alloys, committed to providing high-quality material solutions to customers. Our products cover a wide range of advanced copper alloys, which are widely applied in various industries such as marine engineering, energy chemicals, and mechanical manufacturing. With advanced production technology and a rigorous quality control system, we ensure that each material meets international standards, offering tailored products and professional technical support to help our clients succeed in a competitive market.

For more information about copper alloys or other industrial materials, feel free to contact Suzhou Bolaibao Metal’s expert team.

• Phone: +86 15366282159

• Email: sale@bolaibao1.com

• Website: http://blbmetal.com