Aluminum 7075
7075 aluminum alloy is an aluminum alloy with zinc as the main alloying element. It has excellent mechanical properties and exhibits good ductility, high strength, toughness and good fatigue resistance. It is more susceptible to embrittlement due to microsegregation than many other aluminum alloys, but its corrosion resistance is significantly better than that of 2000 alloy. It is one of the most commonly used aluminum alloys in high stress structural applications and has been widely used in aircraft structural components.
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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
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