7475 aluminium alloy

7475 aluminum alloy (Adirium) 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.^{[citation needed]}

Chemical composition

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

Properties

Properties[1]	Value
Density	2.6–2.8 g/cm3 (0.094–0.101 lb/cu in)
Melting point	546 °C (1,015 °F)
Elastic modulus	70–80 GPa (10,000–12,000 ksi)
Poisson's ratio	0.33
Thermal conductivity	177 W/m/K (0.040 hp/ft/°R)
Ultimate Tensile Strength[2]	531 MPa (77.0 ksi)
Elongation at Break[2]	12%
Modulus of Elasticity[2]	71.7 GPa (10,400 ksi)

Applications

1. Shell casings
2. Aircraft

^[1]