7178 aluminum sheet is a high-strength aluminum–zinc–magnesium–copper alloy in the 7000 series. It offers ultra-high strength, good fatigue resistance, and reasonable corrosion resistance. It is mainly used in aerospace, transportation, and high-performance engineering applications where strength is critical.
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 Strength
One of the highest-strength aluminum alloys, suitable for structural components under heavy load.
- Good Fatigue Resistance
Maintains stability under repeated loading and mechanical stress.
- Moderate Corrosion Resistance
Resistant to atmospheric corrosion, but often requires surface protection such as anodizing or coating.
- Good Machinability
Supports machining, bending, and fabrication with proper handling.
- Stable Mechanical Performance
Maintains properties under long-term service and varying temperatures.
Specifications
| Item | Specification |
|---|---|
| Alloy / Grade | 7178 |
| Chemical Composition (%) | Al ≥ 87.5, Zn 5.6–6.6, Mg 2.0–2.5, Cu 1.0–1.6, Cr 0.18–0.25, Ti ≤ 0.15, Fe ≤ 0.5, Si ≤ 0.4, Others ≤ 0.05 |
| Series | 7000 Series (Al-Zn-Mg-Cu Alloy) |
| Temper | T6, T73, T76 |
| Thickness (mm) | 2 – 100 |
| Width (mm) | 500 – 2500 |
| Length (mm) | 1000 – 12000 (Customizable) |
| Surface Finish | Mill Finish, Anodized, Painted |
| Standard | GB/T 3880, ASTM B209, EN AW-7178 |
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.
- High-strength transportation parts.
- Pressure vessels and containers.
- Mechanical engineering and heavy machinery.
- Defense and military equipment.
