Aluminum Alloy 7068 (UNS A97068)
Aluminum 7068 is a high-strength aluminum alloy that contains zinc, magnesium, copper, and zirconium. It is known for its exceptional strength-to-weight ratio, making it an excellent choice for applications where high strength and light weight are required.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Aluminum | 85.48% | 88.85% |
| Chromium | —— | 0.05% |
| Copper | 1.6% | 2.4% |
| Iron | —— | 0.15% |
| Magnesium | 2.2% | 3.0% |
| Manganese | —— | 0.1% |
| Silicon | —— | 0.12% |
| Titanium | —— | 0.1% |
| Zinc | 7.3% | 8.3% |
| Zirconium | 0.05% | 0.15% |
| Residuals | —— | 0.15% |
The following table provides a list of aluminum 7068 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 2850 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength | 640 MPa |
| Yield Strength | 590 MPa |
| Shear Strength | 300 MPa |
| Young’s Modulus (E) | 73 GPa |
| Shear Modulus (G) | 26 GPa |
| Elongation at Break | 10% |
| Poisson’s Ratio (ν) | 0.33 |
| Thermal Properties | Metric |
| Melting Point | 476 - 635 °C |
| Thermal Conductivity | 190 W/m·K |
| Specific Heat Capacity (Cp) | 1050 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 2.34×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 5.4×10-8 Ω·m |
The values in this table are approximate and can vary depending on various factors such as the specific manufacturing process and heat treatment applied to the alloy.
Advantages & Disadvantages of Aluminum 7068
| Advantages | Disadvantages |
|---|---|
| High strength | High cost |
| Good corrosion resistance | Limited availability |
| Machinability | Heat treatment sensitivity |
Applications of Aluminum 7068
Aluminum 7068 is utilized in various applications that require a combination of high strength, lightweight construction, and good corrosion resistance. Some common applications of Aluminum 7068 include:
- Aerospace: Aluminum 7068 is used in the aerospace industry for structural components such as aircraft fuselages, wings, and landing gear. Its high strength-to-weight ratio allows for weight savings without compromising structural integrity.
- Automotive: Aluminum 7068 is employed in high-performance automotive applications where strength, durability, and weight reduction are essential. It can be found in components such as suspension systems, drive shafts, and lightweight racing parts.
- Defense and Military: Due to its exceptional strength, Aluminum 7068 is used in the defense and military sectors for various applications. It is utilized in armored vehicles, military aircraft, and weaponry components.
- Sporting Goods: Aluminum 7068 is favored in the manufacturing of sporting goods such as bicycle frames, tennis rackets, and golf club heads. Its high strength and lightweight nature contribute to improved performance and maneuverability.
- Marine: Aluminum 7068 finds applications in the marine industry for boat and shipbuilding. It is utilized in structural components, hulls, and superstructures due to its corrosion resistance and strength.
- Industrial Equipment: Aluminum 7068 is employed in the construction of industrial equipment that requires high strength and durability, including machinery frames, hydraulic systems, and robotics.