7050 aluminium alloy

Aluminium 7050 alloy is a heat treatable alloy. It has high toughness, high strength. It has high stress corrosion cracking resistance. ^[1] It has electric conductivity of value having 40 percent of copper.^[2] 7050 aluminium is known as a commercial aerospace alloy.^[3]

Chemical Composition

Element[1]	Content (weight %)
Aluminum, Al	89
Copper, Cu	2.3
Magnesium, Mg	2.3
Zinc, Zn	6.2
Zirconium, Zr	0.12

Physical Properties

Properties[1]	Metric
Density	2.6-2.8 g/cm3
Melting point	494°C
Tensile strength	515 MPa
Yield strength	455 MPa
Fatigue strength	240 MPa
Elastic modulus	70-80 GPa
Poisson's ratio	0.33
Elongation	11%
Thermal conductivity	180 W/mK

Designations

It can be written as:^[1]

1. AMS 4108
2. AMS 4201
3. ASTM B247
4. ASTM B316
5. QQ A-430

Welding

Welding should be avoided, because it weakens aluminum alloy. ^[2]

Applications

1. Aircraft and other structures^[1]
2. Fuselage frames^[2]
3. Bulkheads^[2]
4. Wing skins^[3]
5. Military aircraft applications^[3]