7A09 aluminum coil is a high-strength heat-treatable aluminum alloy belonging to the Al-Zn-Mg-Cu (7xxx) series. It is known for its excellent mechanical strength, good fracture toughness, and reliable performance in heavy-load structural applications. Due to its superior strength-to-weight ratio, 7A09 aluminum sheet is widely used in aerospace, military, and high-end transportation fields.
Specifications
| Item | Specification |
|---|---|
| Alloy / Grade | 7A09 |
| Chemical Composition (%) | Zn 6.0–6.8, Mg 2.3–3.0, Cu 1.2–1.9, Mn ≤ 0.30, Cr ≤ 0.25, Fe ≤ 0.50, Si ≤ 0.40, Ti ≤ 0.10, Al Balance |
| Series | 7000 Series (Al-Zn-Mg-Cu) |
| Temper | O, T6, T651 |
| Thickness (mm) | 1.0 – 150 |
| Width (mm) | 100 – 2600 |
| Length (mm) | 1000 – 12000 (Customizable) |
| Surface Finish | Mill Finish, Anodized (Optional) |
| Standard | GB/T 3880, ASTM B209 (Equivalent) |
Description
Features
- Ultra-High Mechanical Strength
Provides very high tensile and yield strength after heat treatment, suitable for heavy-duty and load-bearing structures.
- Good Fracture Toughness
Maintains stable performance under high stress, reducing the risk of structural failure.
- Good Corrosion Resistance
With proper heat treatment and surface protection, it offers reliable resistance to stress corrosion cracking.
- Excellent Fatigue Resistance
Performs well under cyclic loading, ideal for aerospace and transportation components.
- Good Machinability
Supports precision machining for high-strength structural parts.
Applications
- Aerospace and aviation components
Widely used in aircraft fuselage, wings, and structural components due to very high strength and excellent fatigue resistance.
- Military and defense applications
Suitable for armored vehicles, military aircraft, and other high-strength defense structures.
- Transportation and automotive parts
Applied in high-load structural parts of trucks, buses, and high-performance vehicles where strength-to-weight ratio is critical.
- Structural engineering
Used for bridges, cranes, and other load-bearing structures requiring high mechanical strength and lightweight material.
- Marine applications
Suitable for ship and boat structures where corrosion resistance and high strength are required.
- General fabrication and forming
Ideal for rolling, stamping, bending, and extrusion of medium-to-thin gauge sheets for structural or functional purposes.
