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Aluminum copper alloy
2090 Aluminium alloy consists of copper, lithium, zirconium as minor elements and other impurity alloying elements.
Chemical composition
Element
Weight Percentage (%)
Aluminum
93.2 - 95.6
Copper
2.4 - 3
Lithium
1.9 - 2.6
Magnesium
≤ 0.25
Titanium
≤ 0.15
Iron
≤ 0.12
Zinc
≤ 0.10
Silicon
≤ 0.10
Zirconium
0.080 - 0.15
Manganese
≤ 0.050
Chromium
≤ 0.050
Other (each)
≤ 0.050
Other (total)
≤ 0.15
Physical properties
Properties
Values
Density
2.59 g/cm
Melting point
560 - 650 °C
Mechanical properties
Properties
Values
Tensile strength
550 MPa
Yield strength
520 MPa
Elongation at break
6%
Poisson's ratio
0.34
Elastic modulus
76 GPa
Thermal properties
Thermal Properties
Metric
CTE, linear
23.6 μm/m-°C
at Temperature 20.0 - 100 °C
Specific Heat Capacity
1.203 J/g-°C
at Temperature 100 °C
Thermal Conductivity
88.0 W/m-K
Melting Point
560 - 650 °C
Solidus
560 °C
Liquidus
650 °C
Applications
Aluminium 2090 alloy is used in aircraft components.