Aluminum 7075
Material Data Sheet
7075 aluminum alloy is an aluminum alloy, with zinc as the primary alloying element. It has excellent mechanical properties and exhibits good ductility, high strength, toughness, and good resistance to fatigue. It is more susceptible to embrittlement than many other aluminum alloys because of microsegregation but has significantly better corrosion resistance than the 2000 alloys. It is one of the most commonly used aluminum alloys for highly stressed structural applications and has been extensively utilized in aircraft structural parts.
Chemical Composition
| Element | Content(%) |
|---|---|
| Aluminum, Al | 87.1 – 91.4 |
| Zinc, Zn | 5.1 – 6.1 |
| Magnesium, Mg | 2.1 – 2.9 |
| Copper, Cu | 1.2 – 2.0 |
| Silicon, Si | 0.4 |
Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 2.81 g/cc | 0.102 lb/in3 |
| Melting Point | 477 – 635 °C | 890 – 1175 °F |
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Brinell | 150 | 150 |
| Hardness, Knoop | 191 | 191 |
| Hardness, Rockwell A | 53.5 | 53.5 |
| Hardness, Rockwell B | 87 | 87 |
| Hardness, Vickers | 175 | 175 |
| Ultimate Tensile Strength | 572 MPa | 83000 psi |
| Tensile Yield Strength | 503 MPa | 73000 psi |
| Elongation at Break | 11% | 11% |
| Modulus of Elasticity | 71.7 GPa | 10400 ksi |
Thermal Properties
| Properties | Metric | Imperial |
|---|---|---|
| Thermal Conductivity | 0.96 J/g-°C | 0.229 BTU/lb-°F |
| Thermal Conductivity | 130 W/m-K | 900 BTU-in/hr-ft²-°F |
Applications
Aluminum 7075 is used in the following application areas:
- Aircraft fittings
- Gears and shafts
- Missile parts
- Regulating valve parts
- Worm gears
- Aerospace/defense applications
