7A09 aluminum sheet 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.
Description
Yutwin New Materials specializes in the production of aluminum sheets and coils in a wide range of alloys, grades, and specifications, offering stable quality, flexible customization, and reliable supply to meet the diverse needs of different industries.
Features
- Ultra-high mechanical strength
Suitable for aerospace, transportation, and high-strength structural applications requiring maximum strength-to-weight ratio.
- Good corrosion resistance
Performs well in atmospheric, marine, and industrial environments; corrosion resistance can be further enhanced by anodizing or coating.
- Limited formability and workability
Can be rolled, bent, stamped, and extruded; forming is more restricted compared to 6xxx-series alloys due to higher strength.
- Smooth and uniform surface finish
Ideal for anodizing, painting, or coating for both decorative and functional purposes.
- Good weldability
Compatible with TIG and MIG welding under proper conditions; post-weld heat treatment recommended for optimal strength.
- Lightweight material
Low density helps reduce overall weight while maintaining structural performance.
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) |
Common Aluminum Surface Treatments
Polishing
Polishing uses mechanical grinding, chemical, or electrochemical methods to improve the smoothness and brightness of aluminum surfaces. Polished aluminum features a high-gloss finish and excellent decorative appearance.
Brushing
Brushing is a surface treatment process that creates fine, directional textures on aluminum using abrasive belts or brushes. The brushed surface provides a refined metallic appearance while helping conceal minor scratches.
Coating
Coating applies a protective coating onto the aluminum surface through powder coating, liquid spraying, or other coating methods. It provides excellent weather resistance, corrosion protection, and a wide range of color options. Coated aluminum offers both decorative appeal and long-term durabilit.
Anodizing
Anodizing is an electrochemical process that forms a dense oxide layer on the aluminum surface, improving corrosion resistance, wear resistance, and surface hardness. The oxide layer can also be colored to achieve various finishes.
Sand Blasting
Sand blasting uses high-speed abrasive particles to impact the aluminum surface, creating a uniform matte texture. This process provides a soft metallic appearance, reduces fingerprint marks, and improves coating adhesion for subsequent finishing processes.
Embossing
Embossing is a process that forms raised or recessed patterns on aluminum surfaces through rolling or stamping. Common patterns include stucco, diamond, and wood grain textures. Embossed aluminum offers excellent decorative effects, scratch resistance, and certain anti-slip properties.
Applications
- Aerospace structural components.
- Military and defense equipment.
- High-speed rail and transportation structures.
- Heavy-duty machinery parts.
- High-strength molds and fixtures.
