1 November 2021 2000 Series Aluminum Alloy
2090 Aluminum Alloy Plate
2090 Aluminium alloy consists of copper, lithium, zirconium as minor elements and other impurity alloying elements.Alloy 2090-T83 sheet is a fully commercialized aluminum-lithium alloy developed for high strength aerospace applications. The Al-Cu-Li alloy offers an 8 per cent density savings when compared with other aerospace alloys. Alloy 2090-T83 also has a 10 per cent higher elastic modulus. When coupled with the low density feature, this provides for unique weight saving benefits.
Alloy 2090-T83 has strengths comparable with other high strength aluminum alloys and superior corrosion resistance. The alloy is also one of the most weldable aluminum products available. Some material features of 2090 vary from conventional aluminum alloys and need to be considered during design and material selection. Specific details are further defined in Alcoa’s Green Letter on 2090 alloy.
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/cm³ |
| 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 / aluminum 2090 alloy is chiefly used in areas where high strength is required such as in aircraft components.
The following are some of the aircraft components made from aluminium / aluminum 2090-T83 alloy:
- Aircraft floor bulkhead stiffeners
- Wing leading and trailing edges
- Fuselage bulkhead webs