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Ensinger PEI

Aluminum 2024-T81
Categories: Metal; Nonferrous Metal; Aluminum Alloy; 2000 Series Aluminum Alloy
Material Notes: Information provided by Alcoa and the references. General 2024 characteristics and uses: Good machinability and surface finish capabilities. A high strength material of adequate workability. Has largely superseded 2017 for structural applications.

Uses: Aircraft fittings, gears and shafts, bolts, clock parts, computer parts, couplings, fuse parts, hydraulic valve bodies, missile parts, munitions, nuts, pistons, rectifier parts, worm gears, fastening devices, veterinary and orthopedic equipment, structures.

Data points with the AA note have been provided by the Aluminum Association, Inc. and are NOT FOR DESIGN.

Composition Notes:
A Zr + Ti limit of 0.20 percent maximum may be used with this alloy designation for extruded and forged products only, but only when the supplier and the purchaser have mutually agreed.
Composition information provided by the Aluminum Association and is not for design.
Key Words: Aluminium 2024-T81; UNS A92024; ISO AlCu4Mg1; NF A-U4G1 (France); DIN AlCuMg2; AA2024-T81, ASME SB211; CSA CG42 (Canada); Al2024-T81
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 2.78 g/cc0.100 lb/in³AA; Typical
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 128128500 kg load with 10 mm ball
Hardness, Knoop 161161Converted from Brinell Hardness Value
Hardness, Rockwell A 48.948.9Converted from Brinell Hardness Value
Hardness, Rockwell B 7979Converted from Brinell Hardness Value
Hardness, Vickers 146146Converted from Brinell Hardness Value
Tensile Strength, Ultimate 485 MPa70300 psi
 34.0 MPa
@Temperature 371 °C		4930 psi
@Temperature 700 °F
 52.0 MPa
@Temperature 316 °C		7540 psi
@Temperature 601 °F
 76.0 MPa
@Temperature 260 °C		11000 psi
@Temperature 500 °F
 186 MPa
@Temperature 204 °C		27000 psi
@Temperature 399 °F
 379 MPa
@Temperature 149 °C		55000 psi
@Temperature 300 °F
 455 MPa
@Temperature 100 °C		66000 psi
@Temperature 212 °F
 483 MPa
@Temperature 24.0 °C		70100 psi
@Temperature 75.2 °F
 503 MPa
@Temperature -28.0 °C		73000 psi
@Temperature -18.4 °F
 510 MPa
@Temperature -80.0 °C		74000 psi
@Temperature -112 °F
 586 MPa
@Temperature -196 °C		85000 psi
@Temperature -321 °F
 >= 425 MPa
@Thickness 0.254 - 1.57 mm		>= 61600 psi
@Thickness 0.0100 - 0.0620 in		Flat sheet
 >= 450 MPa
@Thickness 1.60 - 6.32 mm		>= 65300 psi
@Thickness 0.0630 - 0.249 in		Flat sheet
 >= 440 MPa
@Diameter 1.27 - 6.32 mm		>= 63800 psi
@Diameter 0.0500 - 0.249 in		Wire, rod, bar and shapes (extruded)
 >= 440 MPa
@Diameter 1.27 - 6.32 mm		>= 63800 psi
@Diameter 0.0500 - 0.249 in		Extruded tube
 >= 455 MPa
@Diameter 6.35 - 38.1 mm		>= 66000 psi
@Diameter 0.250 - 1.50 in		Wire, rod, bar and shapes (extruded)
 >= 455 MPa
@Diameter 6.35 - 38.1 mm		>= 66000 psi
@Diameter 0.250 - 1.50 in		Extruded tube
Tensile Strength, Yield 450 MPa65300 psi
 >= 370 MPa
@Thickness 0.254 - 1.57 mm		>= 53700 psi
@Thickness 0.0100 - 0.0620 in		Flat sheet
 >= 385 MPa
@Thickness 1.60 - 6.32 mm		>= 55800 psi
@Thickness 0.0630 - 0.249 in		Flat sheet
 >= 385 MPa
@Diameter 1.27 - 6.32 mm		>= 55800 psi
@Diameter 0.0500 - 0.249 in		Wire, rod, bar and shapes (extruded)
 >= 385 MPa
@Diameter 1.27 - 6.32 mm		>= 55800 psi
@Diameter 0.0500 - 0.249 in		Extruded tube
 >= 400 MPa
@Diameter 6.35 - 38.1 mm		>= 58000 psi
@Diameter 0.250 - 1.50 in		Wire, rod, bar and shapes (extruded)
 >= 400 MPa
@Diameter 6.35 - 38.1 mm		>= 58000 psi
@Diameter 0.250 - 1.50 in		Extruded tube
 28.0 MPa
@Strain 0.2 %,
Temperature 371 °C		4060 psi
@Strain 0.2 %,
Temperature 700 °F
 41.0 MPa
@Strain 0.2 %,
Temperature 316 °C		5950 psi
@Strain 0.2 %,
Temperature 601 °F
 62.0 MPa
@Strain 0.2 %,
Temperature 260 °C		8990 psi
@Strain 0.2 %,
Temperature 500 °F
 138 MPa
@Strain 0.2 %,
Temperature 204 °C		20000 psi
@Strain 0.2 %,
Temperature 399 °F
 338 MPa
@Strain 0.2 %,
Temperature 149 °C		49000 psi
@Strain 0.2 %,
Temperature 300 °F
 427 MPa
@Strain 0.2 %,
Temperature 100 °C		61900 psi
@Strain 0.2 %,
Temperature 212 °F
 448 MPa
@Strain 0.2 %,
Temperature 24.0 °C		65000 psi
@Strain 0.2 %,
Temperature 75.2 °F
 469 MPa
@Strain 0.2 %,
Temperature -28.0 °C		68000 psi
@Strain 0.2 %,
Temperature -18.4 °F
 476 MPa
@Strain 0.2 %,
Temperature -80.0 °C		69000 psi
@Strain 0.2 %,
Temperature -112 °F
 538 MPa
@Strain 0.2 %,
Temperature -196 °C		78000 psi
@Strain 0.2 %,
Temperature -321 °F
Elongation at Break 2.0 %2.0 %Foil
 7.0 %
@Temperature -80.0 °C		7.0 %
@Temperature -112 °F
 7.0 %
@Temperature -28.0 °C		7.0 %
@Temperature -18.4 °F
 7.0 %
@Temperature 24.0 °C		7.0 %
@Temperature 75.2 °F
 8.0 %
@Temperature -196 °C		8.0 %
@Temperature -321 °F
 8.0 %
@Temperature 100 °C		8.0 %
@Temperature 212 °F
 11 %
@Temperature 149 °C		11 %
@Temperature 300 °F
 23 %
@Temperature 204 °C		23 %
@Temperature 399 °F
 55 %
@Temperature 260 °C		55 %
@Temperature 500 °F
 75 %
@Temperature 316 °C		75 %
@Temperature 601 °F
 100 %
@Temperature 371 °C		100 %
@Temperature 700 °F
 >= 5.0 %
@Thickness 0.254 - 1.57 mm		>= 5.0 %
@Thickness 0.0100 - 0.0620 in		Flat sheet
 >= 5.0 %
@Thickness 1.60 - 6.32 mm		>= 5.0 %
@Thickness 0.0630 - 0.249 in		Flat sheet
 6.0 %
@Thickness 1.60 mm		6.0 %
@Thickness 0.0630 in		In 5 cm
 >= 4.0 %
@Diameter 1.27 - 6.32 mm		>= 4.0 %
@Diameter 0.0500 - 0.249 in		Wire, rod, bar and shapes (extruded)
 >= 4.0 %
@Diameter 1.27 - 6.32 mm		>= 4.0 %
@Diameter 0.0500 - 0.249 in		Extruded tube
 >= 5.0 %
@Diameter 6.35 - 38.1 mm		>= 5.0 %
@Diameter 0.250 - 1.50 in		Wire, rod, bar and shapes (extruded)
 >= 5.0 %
@Diameter 6.35 - 38.1 mm		>= 5.0 %
@Diameter 0.250 - 1.50 in		Extruded tube
Modulus of Elasticity 72.4 GPa10500 ksiAverage of Tension and Compression. In Al alloys, the compressive modulus is typically 2% greater than the tensile modulus
Poissons Ratio 0.330.33
Fatigue Strength 125 MPa
@# of Cycles 5.00e+8 		18100 psi
@# of Cycles 5.00e+8
Shear Modulus 28.0 GPa4060 ksi
Shear Strength 295 MPa42800 psi
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000449 ohm-cm
@Temperature 20.0 °C		0.00000449 ohm-cm
@Temperature 68.0 °F		AA; Typical
 
Thermal PropertiesMetricEnglishComments
CTE, linear  21.1 µm/m-°C
@Temperature -50.0 - 20.0 °C		11.7 µin/in-°F
@Temperature -58.0 - 68.0 °F
 22.9 µm/m-°C
@Temperature 20.0 - 100 °C		12.7 µin/in-°F
@Temperature 68.0 - 212 °F
 23.2 µm/m-°C
@Temperature 20.0 - 100 °C		12.9 µin/in-°F
@Temperature 68.0 - 212 °F		AA; Typical; average over range
 23.8 µm/m-°C
@Temperature 20.0 - 200 °C		13.2 µin/in-°F
@Temperature 68.0 - 392 °F
 24.7 µm/m-°C
@Temperature 20.0 - 300 °C		13.7 µin/in-°F
@Temperature 68.0 - 572 °F
Specific Heat Capacity 0.875 J/g-°C0.209 BTU/lb-°F
Thermal Conductivity 151 W/m-K1050 BTU-in/hr-ft²-°FAA; Typical at 77°F
Melting Point 502 - 638 °C935 - 1180 °FAA; Typical range based on typical composition for wrought products >= 1/4 in. thickness. Eutectic melting is not eliminated by homogenization.
Solidus 502 °C935 °FAA; Typical
Liquidus 638 °C1180 °FAA; Typical
 
Processing PropertiesMetricEnglishComments
Annealing Temperature 413 °C775 °F
Solution Temperature 493 °C919 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 90.7 - 94.7 %90.7 - 94.7 %As remainder
Chromium, Cr <= 0.10 %<= 0.10 %
Copper, Cu 3.8 - 4.9 %3.8 - 4.9 %
Iron, Fe <= 0.50 %<= 0.50 %
Magnesium, Mg 1.2 - 1.8 %1.2 - 1.8 %
Manganese, Mn 0.30 - 0.90 %0.30 - 0.90 %
Other, each <= 0.05 %<= 0.05 %
Other, total <= 0.15 %<= 0.15 %
Silicon, Si <= 0.50 %<= 0.50 %
Titanium, Ti <= 0.15 %<= 0.15 %
Zinc, Zn <= 0.25 %<= 0.25 %

References for this datasheet.

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