7475 aluminium alloy

7475 aluminum alloy is a wrought alloy with high zinc weight percentage. It also contains magnesium, silicon and chromium.[1]

7475 alloy can not be welded. It has more spring back because of its strength. It has high machinability.

Chemical composition
Element[1] Content (%)
Aluminum 90.3
Zinc 5.7
Magnesium 2.3
Silicon 1.50
Chromium 0.22

Properties
Properties[1] Metric
Density 2.6-2.8 g/cm3
Melting point 546 °C
Elastic modulus 70-80 GPa
Poisson's ratio 0.33
Thermal conductivity 177 W/m-K
Ultimate Tensile Strength[2] 531 MPa
Elongation at Break[2] 12 %
Modulus of Elasticity[2] 71.7 GPa

Applications
  1. Shell casings
  2. Aircraft

[1]

References
  1. "Aluminum 7475 alloy".
  2. "7475 alloys".
  1. https://www.suppliersonline.com/propertypages/7475.asp
  2. https://www.suppliersonline.com/propertypages/7475.asp
  3. https://www.makeitfrom.com/material-properties/7475-AlZn5.5MgCuA-Aluminum
  4. Tanaka, Hiroki; Minoda, Tadashi (1 July 2014). "Mechanical properties of 7475 aluminum alloy sheets with fine subgrain structure by warm rolling". Transactions of Nonferrous Metals Society of China. 24 (7): 2187–2195. doi:10.1016/S1003-6326(14)63331-8.
  5. https://www.efunda.com/Materials/alloys/aluminum/show_aluminum.cfm?ID=AA_7475&show_prop=all&Page_Title=AA%207475
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