Alcoa 2090-T83 Aluminum

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Alcoa 2090-T83 Aluminum
Categories:	Metal; Nonferrous Metal; Aluminum Alloy; 2000 Series Aluminum Alloy
Material Notes:	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. Information provided by Alcoa.
Key Words:	UNS A92090; Aluminium 2090-T83; AlLi; Aluminum Lithium Alloy; AA2090-T83
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Physical Properties	Original Value	Comments

Density	2.59 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	>= 64000 psi @Thickness 3.17 mm	45° Direction
	>= 73000 psi @Thickness 3.17 mm	LT Direction
	>= 77000 psi @Thickness 3.17 mm	Longitudinal Direction
Tensile Strength, Yield	>= 56000 psi @Thickness 3.17 mm	45° Direction
	>= 66000 psi @Thickness 3.17 mm	LT Direction
	>= 70000 psi @Thickness 3.17 mm	Longitudinal Direction
Elongation at Break	>= 3.0 % @Thickness 3.17 mm	Longitudinal Direction
	>= 5.0 % @Thickness 3.17 mm	LT Direction
Modulus of Elasticity	11500 ksi
Fatigue Strength	15000 psi @# of Cycles 1.00e+7	Notched (K_T = 3)
	16000 psi @# of Cycles 1.00e+6	Notched (K_T = 3)
	21000 psi @# of Cycles 100000	Notched (K_T = 3)
	30000 psi @# of Cycles 1.00e+7	Smooth
	33000 psi @# of Cycles 10000	Notched (K_T = 3)
	35000 psi @# of Cycles 1.00e+6	Smooth
	44000 psi @# of Cycles 100000	Smooth
	68000 psi @# of Cycles 10000	Smooth
Fracture Toughness	40.0 ksi-in½ @Thickness 3.17 mm	K_C, L-T

Thermal Properties	Original Value	Comments
CTE, linear	23.6 µm/m-°C @Temperature 20.0 - 100 °C	per Aluminum Association
Specific Heat Capacity	1.203 J/g-°C @Temperature 100 °C	per Aluminum Association
Thermal Conductivity	88.0 W/m-K	per Aluminum Association
Melting Point	560 - 650 °C	per Aluminum Association
Solidus	560 °C	per Aluminum Association
Liquidus	650 °C	per Aluminum Association

Component Elements Properties	Original Value	Comments
Aluminum, Al	93.2 - 95.6 %	As remainder
Chromium, Cr	<= 0.05 %
Copper, Cu	2.4 - 3.0 %
Iron, Fe	<= 0.12 %
Lithium, Li	1.9 - 2.6 %
Magnesium, Mg	<= 0.25 %
Manganese, Mn	<= 0.05 %
Other, each	<= 0.05 %
Other, total	<= 0.15 %
Silicon, Si	<= 0.10 %
Titanium, Ti	<= 0.15 %
Zinc, Zn	<= 0.10 %
Zirconium, Zr	0.08 - 0.15 %

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NALCOA25 / 176079

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