Aluminum-Lithium (Al-Li) Alloy 2090 Description
Aluminum-Lithium (Al-Li) Alloy 2090 can be used in marine, aerospace, and electronic components because of their lightweight, good ductility, and corrosion resistance. Lithium is the lightest metal element in the world. The addition of lithium to aluminum reduces the specific gravity of the alloy and increases the stiffness while still maintaining high strength, good corrosion resistance and fatigue resistance, and suitable ductility.
Lithium reduces density and increases stiffness when alloyed with aluminum. With proper alloy design, aluminum-lithium alloys can have exceptional combinations of strength and toughness.
Aluminum-Lithium (Al-Li) Alloy 2090 Specifications
Metal Mechanic Property
Item#
|
Density, p/gcm3
|
Temper
|
Tensile Stength Rm/MPa
|
Yield Strength Rpo2/Mpa
|
Elongation at Break, A/%
|
Fracture toughness MPa-m½
|
Elasticity mdulus E/GPa
|
2090
|
2.59 g/cc
|
T84
|
525
|
470
|
5.0
|
49.0
|
76.0
|
|
Metal Composition
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
|
Metal Mechanic Property
Item#
|
E/Gpa
|
Rm/Mpa
|
Rpo2/Mpa
|
A/%
|
r/g cm-3
|
2090
|
79.7
|
569
|
530
|
7.9
|
2.57
|
Specifications for Delivery
type
|
cast ingot
|
rolled plate
|
Al-Li alloy
|
φ80-φ200mm
|
thickness:1-20mm width:100-450mm
|
Al-Li intermediate alloy
|
Li:5%-30%
|
-
|
Aluminum-Lithium (Al-Li) Alloy 2090 Application
Aluminum Lithium Alloys are used in marine, aerospace, and electronic components because of their lightweight, good ductility, and corrosion resistance. The aerospace industry uses include wing leading and trailing edges, fuselage bulkhead webs, and internal framework parts. Al-Li is being considered for many applications in advanced aircraft including wing structures.