7075 Aluminum Coil
7075 Aluminum Alloy: The Ultimate High-Strength Aerospace-Grade Solution
Premium Zinc-Alloyed Aluminum for Extreme Performance
7075 aluminum alloy (UNS A97075) represents the pinnacle of high-strength aluminum alloys, with zinc (5.1-6.1%) as its primary alloying element. This heat-treatable alloy delivers exceptional mechanical properties, including a tensile strength of 572 MPa and yield strength of 503 MPa (per ASTM B209). While slightly less ductile than other aluminum alloys (11% elongation), it offers superior fatigue resistance – making it 40% stronger than 6061 alloy while maintaining 85% of its corrosion resistance.
Why 7075 Aluminum?
- Aerospace-Grade Strength: 503 MPa minimum yield strength (T6 temper)
- Fatigue Resistance: 10⁷ cycle endurance limit at 160 MPa
- Machinability: 70% relative to free-cutting brass
- Weight Savings: 30% lighter than steel at equivalent strength
Technical Specifications
1. Chemical Composition (ASTM B209 Standard)
| Element | Zn | Cu | Mg | Cr | Al |
|---|---|---|---|---|---|
| % Range | 5.1-6.1 | 1.2-2.0 | 2.1-2.9 | 0.18-0.28 | Balance |
Trace elements: Fe≤0.50%, Si≤0.40%, Ti≤0.20%
2. Mechanical Properties
| Temper | Tensile (MPa) | Yield (MPa) | Elongation (%) | Hardness (HV) |
|---|---|---|---|---|
| T6 | 572 | 503 | 11 | 175 |
| T73* | 505 | 435 | 13 | 150 |
T73 temper improves stress corrosion resistance
Test methods: ASTM E8 (tensile), ISO 6507-1 (hardness)
3. Physical Characteristics
| Parameter | Value | Unit |
|---|---|---|
| Density | 2.81 | g/cm³ |
| Melting Range | 475-635 | °C |
| CTE | 23.6×10⁻⁶ | /°C |
| Modulus | 71.7 | GPa |
Custom Manufacturing Options
Available Forms:
- Thickness: 0.5-150mm (±0.1mm tolerance)
- Width: 25-2500mm (custom slitting available)
- Length: Precision-cut up to 12 meters
Surface Finishes:
- Mill finish (standard Ra 0.8-1.6μm)
- Alodine coating (0.5-1.2μm)
- Hard anodizing (25-50μm)
Value-Added Services:
- CNC machining (±0.05mm accuracy)
- Heat treatment (T6/T73 temper)
- Laser cutting for complex geometries
Industrial Applications
Aerospace:
- Aircraft wing spars
- Landing gear components
- Spacecraft structural members
Defense:
- Military vehicle armor
- Missile components
- Weapon mounts
High-Performance:
- Bicycle frames
- Racing components
- Robotics arms
Performance Comparison
| Property | 7075 | 6061 | 2024 |
|---|---|---|---|
| Tensile (T6) | 572 MPa | 310 MPa | 469 MPa |
| Fatigue Limit | 160 MPa | 97 MPa | 138 MPa |
| Corrosion | Good | Excellent | Fair |
| Cost Index | 1.5 | 1.0 | 1.2 |
Fabrication Guidelines
Machining Tips:
- Use carbide tools (0.1mm/rev feed rate)
- Maintain cutting speeds below 300 SFM
- Apply coolant to prevent work hardening
Heat Treatment:
- Solution heat treat at 480°C (1 hour)
- Quench in water (20-30°C)
- Age harden at 120°C (24 小時)
Quality Assurance
- 100% ultrasonic inspection
- Third-party material certification
- Full traceability documentation
Certifications: AMS 4047, MIL-A-22771
Packaging: VCI-coated wooden crates
Lead Time: 10-18 days for certified material
Why 7075 Dominates Aerospace?
First, its zinc content enables exceptional strength. Second, copper enhances precipitation hardening. Moreover, chromium improves stress corrosion resistance. Additionally, strict aerospace certifications ensure reliability. Finally, proven performance justifies its premium cost.
For structural components, specify T6 temper. Marine environments benefit from T73. Regardless of application, 7075 delivers uncompromising performance.
Packing And Delivery
