Aluminum 7075
CNC Machining
Overview
7075 aluminum alloy is one of the highest strength aluminum alloys available. Its strength-to-weight ratio is excellent, and it has been extensively used in aircraft structural parts and other highly stressed structural applications.
Mechanical Properties
| Tensile Strength | ≥ 572 MPa |
| Yield Strength | ≥ 503 MPa |
| Elongation | ≥ 11% |
| Modulus of Elasticity | 71.7 GPa |
| Hardness | 150 HB |
Physical Properties
| Density | 2,810 kg/m³ |
| Melting Point | 477-635°C |
| Specific Heat Capacity | 0.96 J/g·K |
| Thermal Conductivity | 130 W/m·K |
| Coefficient of Thermal Expansion | 23.4 × 10⁻⁶ K⁻¹ |
| Electrical Resistivity | 5.15 × 10⁻⁸ Ω·m |
Applications
Aircraft fittings
Gears and shafts
Missile parts
Regulating valve parts
Worm gears
Keys
Advantages
- Very high strength
- Excellent fatigue resistance
- Good machinability
- High strength-to-weight ratio
Limitations
- Poor weldability
- Lower corrosion resistance than 6061
- More expensive
- Stress corrosion cracking susceptibility
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