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.
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 |
Description
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.
Applications
- Aerospace structural components.
- High-strength transportation parts.
- Pressure vessels and containers.
- Mechanical engineering and heavy machinery.
- Defense and military equipment.
