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Aluminum 7075

Aluminum 7075 is without a doubt one of the most recognized metals on the market as it avails a combination of exceptional strength and toughness without equal. Due to its efficiency, the alloy of this grade enjoys wide acceptance in critical applications such as aerospace and automotive industries.

Material Type

Type: Metal, Nonferrous Metal, Aluminum Alloy Series: 7000 Series Aluminum Alloy

Alternative Names

Common Name: Aluminum 7075 /Other Designations: - UNS A97075 - ISO AlZn5.5MgCu - AA7075-T6

Process Compatibility

This material has good machinability (around 70% for aluminum alloys) but is generally unsuitable for welding due to cracking risks. It can be formed in the annealed state, though its formability is limited in the T6 temper. Heat treatment enhances strength through solution heat treatment and aging, while anodizing improves corrosion resistance and surface finish.

Aluminum 7075
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Jason xue

Kingsun's senior machining engineer

Aluminum 7075 Properties

Learn the important characteristics of Aluminum 7075, a high-strength alloy, because of its superior strength-to-weight ratio, commendable corrosion-resistance and durability, it is used in aircraft and automotive industries.
1

Mechanical Properties

  • Tensile Strength, Ultimate: 572 MPa (83,000 psi)
  • Tensile Strength, Yield: 503 MPa (73,000 psi)
  • Elongation at Break: 11% at room temperature
  • Hardness, Brinell: 150
  • Fatigue Strength: 159 MPa (23,000 psi)
2

Physical Properties

  • Density: 2.81 g/cc (0.102 lb/in³)
  • Modulus of Elasticity: 71.7 GPa (10,400 ksi)
  • Poisson's Ratio: 0.33
3

Thermal Properties

  • Thermal Conductivity: 130 W/m-K
  • Specific Heat Capacity: 0.960 J/g-°C
  • Melting Point: 477 - 635 °C (890 - 1175 °F)
4

Electrical Properties

Electrical Resistivity: 0.00000515 ohm-cm at 20°C

5

Post Treatments

  • Annealing Temperature: 413 °C (775 °F)
  • Solution Temperature: 466 - 482 °C (870 - 900 °F)
  • Aging Temperature: 121 °C (250 °F)
6

Common Applications

  • Aircraft fittings, gears, and shafts
  • Fuse parts, meter shafts, and gears
  • Missile parts, regulating valve parts, worm gears, keys
  • Aerospace and defense applications
  • Bike frames and ATV sprockets

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Frequently Asked Questions (FAQs)

Q: Give a characterization of 7075 aluminum and its characteristics.

A: 7075 aluminum is a type of aluminum alloy that is characterized by high strength which is its application in construction. Main properties, in its turn, are high machinability, medium corrosion resistance and high-fatigue strength. Hence, it is used in various industries like aerospace, military.

Q: What are the main alloying elements added to 7075 aluminum?

A: Zinc is the primary alloying ingredient in 7075 aluminum, and copper and magnesium, chromium, and a little silicon, manganese and titanium are the other alloying elements present with some properties.

Q: Why is T6 temper of 7075 aluminum so important?

A: The T6 temper is important It shows that the alloy had been solution heat treated and artificially age hardened to attain maximum strength. Hence, the 7075 Aluminum T6 is of particular interest for use in high stress applications i.e. aircraft parts.

Q: In comparison with other aluminum alloys, how does corrosion resistance of 7075 aluminum perform?

A: Corrosion resistance of 7075 aluminum is good. However, it is not as good as the other alloys of aluminum such as 2024 aluminum. Though, the corrosion resistance can be enhanced by anodizing or putting up a barrier protective coat.

Q: In what types of applications is 7075 aluminum commonly used?

A: Typically, used in highly stressed applications such as aircraft, military, automotive, and precision rifle construction, 7075 aluminum is anassuredly widely used. It is also used in applications that require high strength to weight ratio, including airframes for hang gliders and chassis plates.

Q: Is 7075 aluminum a good material to machine and what are the machinability characteristics of this aluminum?

A: Yes, there are those with recommendations that 7075 aluminum has excellent machinability properties, and this is true. There is little difficulty in fabrication with this alloy applying normal machining methods, this is essential for fabricating intricate parts and products.

Q: How does the 7075 aluminum come in sizes and forms for manufacturing?

A: Circular, square and rough 7075 aluminum bars. Strip, sheet and plate, and extruded shapes of these forms are available for almost all the manufacturing needs from structural parts to complex parts.

A: Strength-to-weight ratio and 7075 aluminum alloy. 7075 is considered to be among the strongest possible aluminum alloys and it can match some very steels but is quite lighter. This makes it possible to maximize on the applications where light weight material is needed with reasonable strength.

Q: Can 7075 Aluminum withstand the harshness of the sea?

A: 7075 aluminum can also be used for marine structures, but it is worth noting that it does not have the same degree of corrosion resistance as some other marine grade alloys. Applications might need anti-corrosion paint or anodization.

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