Aluminium Dural 7075

Aluminium dural 7075 (often referred to as dural 7075 or duralumin 7075) is a high-strength aluminum alloy belonging to the aluminum-zinc-magnesium alloy series, known for its excellent mechanical properties and good corrosion resistance. 7075 aluminum alloy's “Dural” name is derived from its wide range of applications in the aerospace and aviation fields, especially in environments with high loads and high strength requirements. The name “Dural” is derived from its widespread use in the aerospace industry, especially in environments where high loads and high strengths are required.

The major alloying elements of aluminium dural 7075 and their content ranges are usually as follows:

- Zinc (Zn): 5.1% - 6.1%

- Magnesium (Mg): 2.1% - 2.9

- Copper (Cu): 1.2% - 2.0

- Chromium (Cr): 0.18% - 0.28

- The content of other elements such as silicon (Si), manganese (Mn), iron (Fe) is low.

Key properties of aluminium dural 7075:

1. High Strength: 7075 aluminum alloy is one of the strongest types of aluminum alloy, with tensile strengths of 570 MPa or more, making it suitable for use in structural components subjected to high levels of stress.

2. Lightweight: 7075 aluminum alloy is less dense than steel and has a high strength-to-weight ratio, making it an ideal material for aerospace and military applications.

3. Good corrosion resistance: Although the corrosion resistance of 7075 aluminum alloy is not as good as that of some other aluminum alloys (e.g., 6061), its corrosion resistance can be significantly improved after anodic oxidation and other surface treatments.

4. Machinability: 7075 aluminum alloy after heat treatment, its mechanical properties have been enhanced, and in the machining of good machinability.

5. Poor weldability: 7075 aluminum alloy has poor weldability and is not suitable for use in welded structures, so it is usually designed with mechanical connections or other methods.

Aluminium dural 7075 is widely used in the following fields due to its excellent performance:

- Aerospace: aircraft fuselage, wings, structural supports and other high load components.

- Military: structural components for weapons systems, fighter jets and armored vehicles.

- High-strength sports equipment: such as bicycle frames, ski equipment, etc.

- Marine: for some ship components that require high strength and low weight.

Aluminium dural 7075 is an important material for high-end applications because of its high strength, light weight and good corrosion resistance. Despite its poor weldability, demand in aerospace, military and high-performance sports equipment makes it an indispensable choice.