May 20 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Applications
Introduction
Commercially pure aluminium / aluminum is a silverish white, lustrous metal. The outstanding characteristic of this metal its light weight.
Although aluminium / aluminum alloys are strong, they can be easily worked, as it is very malleable and ductile. Aluminium / aluminum 2090 alloy is a heat treatable wrought alloy that can be easily welded.
The following datasheet will provide more details about aluminium / aluminum 2090 alloy.
Chemical Composition
The following table shows the chemical composition of aluminium / aluminum 2090-T83 alloy.
|
Element |
Content (%) |
|
Aluminum, Al |
93.2 - 95.6 |
|
Copper, Cu |
2.4 - 3 |
|
Lithium, Li |
1.9 - 2.6 |
|
Magnesium, Mg |
≤ 0.25 |
|
Titanium, Ti |
≤ 0.15 |
|
Iron, Fe |
≤ 0.12 |
|
Zinc, Zn |
≤ 0.10 |
|
Silicon, Si |
≤ 0.10 |
|
Zirconium, Zr |
0.080 - 0.15 |
|
Manganese, Mn |
≤ 0.050 |
|
Chromium, Cr |
≤ 0.050 |
|
Other (each) |
≤ 0.050 |
|
Other (total) |
≤ 0.15 |
Physical Properties
The physical properties of aluminium / aluminum 2090-T83 alloy are outlined in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
2.59 g/cm³ |
0.0936 lb/in³ |
|
Melting point |
560 - 650°C |
1040 - 1200°F |
Mechanical Properties
The mechanical properties of aluminium / aluminum 2090-T83 alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Tensile strength (@diameter 12.7 mm/0.500 in) |
550 MPa |
79800 psi |
|
Yield strength (@diameter 12.7 mm/0.500 in) |
520 MPa |
75400 psi |
|
Elongation at break (@diameter 12.7 mm/0.500 in) |
6% |
6% |
|
Poisson’s ratio |
0.34 |
0.34 |
|
Elastic modulus |
76 GPa |
11000 ksi |
|
Shear strength |
320 MPa |
46400 psi |
|
Hardness, Brinell (@load 500 kg; thickness 10.0 mm) |
150 |
150 |
|
Hardness, Knoop (converted from Brinell hardness value) |
191 |
191 |
|
Hardness, Rockwell A (converted from Brinell hardness value) |
53.6 |
53.6 |
|
Hardness, Rockwell B (converted from Brinell hardness value) |
87 |
87 |
|
Hardness, Vickers (converted from Brinell hardness value) |
176 |
176 |
Thermal Properties
The thermal properties of aluminium / aluminum 2090-T83 alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-100°C/68-212°F) |
23.6 µm/m°C |
13.1 µin/in°F |
|
Thermal conductivity |
88 W/mK |
611 BTU in/hr.ft².°F |
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