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Alclad Aluminum 2024-T861
Categories: Metal; Nonferrous Metal; Aluminum Alloy; 2000 Series Aluminum Alloy
Material Notes: General 2024 characteristics and uses (from Alcoa): 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 Has largely superseded 2017 for structural applications.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. Intrinsic corrosion resistance of 2024 is low for an aluminum alloy, so the clad version is used where needed.

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

Composition Notes: Composition for AA 2024 (not Alclad 2024).
Composition information provided by the Aluminum Association and is not for design.
Key Words: UNS A82024; Alclad 2024-T861; Alclad 2024-T861; Al2024-T861
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Physical PropertiesOriginal ValueComments
Density 2.78 g/ccFor AA2024 (Not Alclad)
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Ultimate 70.0 ksiAA; Typical
 >= 440 MPa
@Thickness 0.508 - 1.57 mm		Sheet and plate
 >= 470 MPa
@Thickness 6.35 - 12.7 mm		Sheet and plate
 >= 475 MPa
@Thickness 1.60 - 6.32 mm		Sheet and plate
 >= 485 MPa
@Thickness >=12.7 mm		Sheet and plate
Tensile Strength, Yield 66.0 ksiAA; Typical
 >= 400 MPa
@Thickness 0.508 - 1.57 mm		Sheet and plate
 >= 425 MPa
@Thickness 6.35 - 12.7 mm		Sheet and plate
 >= 440 MPa
@Thickness 1.60 - 6.32 mm		Sheet and plate
 >= 440 MPa
@Thickness >=12.7 mm		Sheet and plate
Elongation at Break >= 3.0 %
@Thickness 0.508 - 1.57 mm		Sheet and plate
 >= 4.0 %
@Thickness 1.60 - 6.32 mm		Sheet and plate
 >= 4.0 %
@Thickness 6.35 - 12.7 mm		Sheet and plate
 >= 4.0 %
@Thickness >=12.7 mm		Sheet and plate
 6.0 %
@Thickness 1.59 mm		AA; Typical
Modulus of Elasticity 10600 ksiAA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poissons Ratio <= 0.33
Shear Modulus 28.0 GPa
Shear Strength 42.0 ksiAA; Typical
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.00000450 ohm-cm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 21.1 µm/m-°C
@Temperature -50.0 - 20.0 °C
 22.9 µm/m-°C
@Temperature 20.0 - 100 °C
 23.8 µm/m-°C
@Temperature 20.0 - 200 °C
 24.7 µm/m-°C
@Temperature 20.0 - 300 °C
Specific Heat Capacity 0.875 J/g-°C
Thermal Conductivity 151 W/m-K
 
Processing PropertiesOriginal ValueComments
Annealing Temperature 775 °F
Solution Temperature 493 °C
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al 90.7 - 94.7 %As remainder
Chromium, Cr <= 0.10 %
Copper, Cu 3.8 - 4.9 %
Iron, Fe <= 0.50 %
Magnesium, Mg 1.2 - 1.8 %
Manganese, Mn 0.30 - 0.90 %
Other, each <= 0.05 %
Other, total <= 0.15 %
Silicon, Si <= 0.50 %
Titanium, Ti <= 0.15 %
Zinc, Zn <= 0.25 %

References for this datasheet.

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