CuZn25Al5Mn4Fe3 High Tensile Brass: Composition, Properties, and Applications
High Tensile Brass, specifically CuZn25Al5Mn4Fe3, represents an important category of copper-based alloys, widely recognized for its remarkable strength and resilience. Often compared to the internationally standardized ASTM B505 C86300, this alloy is engineered to meet the stringent demands of various industrial applications, providing a robust solution for machine elements exposed to extreme conditions.
Chemical Composition
CuZn25Al5Mn4Fe3 High Tensile Brass is carefully formulated to achieve a balance of toughness and mechanical stability:
- Aluminum (Al): 3.0% minimum to 7.0% maximum
- Copper (Cu): 60.0% minimum to 67.0% maximum
- Iron (Fe): 1.5% to 4.0%
- Manganese (Mn): 2.5% to 5.0%
- Nickel (Ni): Up to 3.0% (including)
- Zinc (Zn): Remainder
- Trace Elements: Small amounts of Phosphorus (P), Lead (Pb), Antimony (Sb), Silicon (Si), and Tin (Sn) to enhance the alloy’s properties without compromising its integrity.
Mechanical Properties
The mechanical characteristics of CuZn25Al5Mn4Fe3 make it an optimal choice for heavy-duty applications:
- Tensile Strength (Rm): 750 MPa
- Yield Point (Rp0.2): 480 MPa
- Elongation (A): 5%
- Hardness (HBW 10-1000): 190
These properties are indicative of the alloy’s ability to withstand high stress and strain without failure, making it suitable for critical engineering applications.
Physical Properties
CuZn25Al5Mn4Fe3 also boasts significant physical attributes that contribute to its utility across various temperature ranges:
- Density: 7.8 kg/dm3
- Specific Heat: 0.376 J/(g*K)
- Thermal Expansion Coefficient: 18.0 x 10^-6 K^-1
- Thermal Conductivity: 45 – 55 W/(m*K)
- Electrical Conductivity: 7 – 8 MS/m
These physical properties ensure that the alloy performs reliably under thermal variations and electrical applications, enhancing its versatility.
Applications
CuZn25Al5Mn4Fe3 is predominantly used in areas where high strength and resistance to wear and tear are crucial. Typical applications include:
- Heavy Machinery: Gears, bushings, and bearings that require high load-bearing capacity.
- Marine Engineering: Components exposed to corrosive marine environments.
- Aerospace and Defense: Parts that must endure high stress and variable environmental conditions.
Conclusion
CuZn25Al5Mn4Fe3 High Tensile Brass is more than just an alloy; it is a cornerstone material in industries that demand the utmost reliability and performance. Its balanced chemical composition and superior mechanical and physical properties make it an ideal choice for applications that are as varied as they are challenging. With its robustness and versatility, CuZn25Al5Mn4Fe3 continues to be a preferred material for engineers and designers looking to push the limits of what is possible in industrial applications.
