Aluminum 2091-T8x

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Aluminum 2091-T8x
Categories:	Metal; Nonferrous Metal; Aluminum Alloy; 2000 Series Aluminum Alloy
Material Notes:	These values for 0% cold work. Data points with the AA note have been provided by the Aluminum Association, Inc. and are NOT FOR DESIGN. Composition Notes: Composition information provided by the Aluminum Association and is not for design.
Key Words:	Aluminium 2091-T8x; AlLi; Aluminum Lithium Alloy; AA2091-T8x; UNS A92091; Al2091-T8x
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Physical Properties	Metric	English	Comments

Density	2.58 g/cc	0.0932 lb/in³	AA; Typical

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	115	115	500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop	146	146	Converted from Brinell Hardness Value
Hardness, Rockwell A	45.6	45.6	Converted from Brinell Hardness Value
Hardness, Rockwell B	71	71	Converted from Brinell Hardness Value
Hardness, Vickers	130	130	Converted from Brinell Hardness Value
Tensile Strength, Ultimate	430 MPa	62400 psi
Tensile Strength, Yield	330 MPa	47900 psi
Elongation at Break	18 %	18 %
Modulus of Elasticity	75.0 GPa	10900 ksi
Fatigue Strength	80.0 MPa @# of Cycles 1.00e+8	11600 psi @# of Cycles 1.00e+8	Notched with Kt = 1.035
Shear Strength	260 MPa	37700 psi	Calculated value.

Thermal Properties	Metric	English	Comments
CTE, linear	23.9 µm/m-°C @Temperature 20.0 - 100 °C	13.3 µin/in-°F @Temperature 68.0 - 212 °F
Specific Heat Capacity	0.860 J/g-°C @Temperature 100 °C	0.206 BTU/lb-°F @Temperature 212 °F
Thermal Conductivity	84.0 W/m-K	583 BTU-in/hr-ft²-°F
Melting Point	560 - 670 °C	1040 - 1240 °F
Solidus	560 °C	1040 °F
Liquidus	670 °C	1240 °F

Component Elements Properties	Metric	English	Comments
Aluminum, Al	91.9 - 95.4 %	91.9 - 95.4 %	As remainder
Chromium, Cr	<= 0.10 %	<= 0.10 %
Copper, Cu	1.8 - 2.5 %	1.8 - 2.5 %
Iron, Fe	<= 0.30 %	<= 0.30 %
Lithium, Li	1.7 - 2.3 %	1.7 - 2.3 %
Magnesium, Mg	1.1 - 1.9 %	1.1 - 1.9 %
Manganese, Mn	<= 0.10 %	<= 0.10 %
Other, each	<= 0.05 %	<= 0.05 %
Other, total	<= 0.15 %	<= 0.15 %
Silicon, Si	<= 0.20 %	<= 0.20 %
Titanium, Ti	<= 0.10 %	<= 0.10 %
Zinc, Zn	<= 0.25 %	<= 0.25 %
Zirconium, Zr	0.04 - 0.16 %	0.04 - 0.16 %

References for this datasheet.

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MA2091T8 / 8900

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