Aluminium copper alloy
2091 aluminium has chromium, copper, iron, lithium, magnesium as minor alloying elements.[1]
Chemical composition
| Element[1]
|
Value
|
| Aluminum
|
91.9 - 95.4%
|
| Chromium
|
≤ 0.10%
|
| Copper
|
1.8 - 2.5%
|
| Iron
|
≤ 0.30%
|
| Lithium
|
1.7 - 2.3%
|
| Magnesium
|
1.1 - 1.9%
|
| Manganese
|
≤ 0.10%
|
| Other, each
|
≤ 0.05%
|
| Other, total
|
≤ 0.15%
|
| Silicon
|
≤ 0.20%
|
| Titanium
|
≤<= 0.10%
|
| Zinc
|
≤ 0.25%
|
| Zirconium
|
0.04 - 0.16%
|
Properties
| Properties[1]
|
Value
|
| Density
|
2.58 g/cc
|
| Tensile Strength, Ultimate
|
430 MPa
|
| Tensile Strength, Yield
|
330 MPa
|
| Elongation at Break
|
18 %
|
| Modulus of Elasticity
|
75.0 GPa
|
| CTE, linear
|
23.9 μm/m-°C
@Temperature 20.0 - 100 °C
|
| Specific Heat Capacity
|
0.860 J/g-°C
at Temperature 100 °C
|
| Thermal Conductivity
|
84.0 W/m-K
|
| Melting Point
|
560 - 670 °C
|
| Solidus
|
560 °C
|
| Liquidus
|
670 °C
|
Aluminium alloy table
References
