Aluminum 2024-T3

Aluminum 2024-T3

Subcategory: 2000 Series Aluminum Alloy; Aluminum Alloy; Metal; Nonferrous Metal

Close Analogs:

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 or producer and the purchaser have mutually so agreed. Agreement may be indicated, for example, by reference to a standard, by letter, by order note, or other means which allow the Zr + Ti limit.
Aluminum content reported is calculated as remainder.
Composition information provided by the Aluminum Association and is not for design.

Key Words: Aluminium 2024-T3; UNS A92024; ISO AlCu4Mg1; NF A-U4G1 (France); DIN AlCuMg2; AA2024-T3, ASME SB211; CSA CG42 (Canada)

Component    Wt. %
Al 90.7 – 94.7
Cr Max 0.1
Cu 3.8 – 4.9
Fe Max 0.5
Component    Wt. %
Mg 1.2 – 1.8
Mn 0.3 – 0.9
Other, each Max 0.05
Other, total Max 0.15
Component    Wt. %
Si Max 0.5
Ti Max 0.15
Zn Max 0.25

Material Notes: 
General 2024 characteristics and uses (from Alcoa): Good machinability and surface finish capabilities. A high strength material of adequate workability. Has largely superceded 2017 for structural applications.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 Aluminium Association, Inc. and are NOT FOR DESIGN.

Physical Properties

Physical Properties Metric English Comments
Density 2.78 g/cc 0.1 lb/in³  AA; Typical

Mechanical Properties

Hardness, Brinell 120 120  AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop 150 150  Converted from Brinell Hardness Value
Hardness, Rockwell A 46.8 46.8  Converted from Brinell Hardness Value
Hardness, Rockwell B 75 75  Converted from Brinell Hardness Value
Hardness, Vickers 137 137  Converted from Brinell Hardness Value
Ultimate Tensile Strength 483 MPa 70000 psi  AA; Typical
Tensile Yield Strength 345 MPa 50000 psi  AA; Typical
Elongation at Break 18 % 18 %  AA; Typical; 1/16 in. (1.6 mm) Thickness
Modulus of Elasticity 73.1 GPa 10600 ksi  AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Notched Tensile Strength 379 MPa 55000 psi  2.5 cm width x 0.16 cm thick side-notched specimen, Kt = 17.
Ultimate Bearing Strength 855 MPa 124000 psi  Edge distance/pin diameter = 2.0
Bearing Yield Strength 524 MPa 76000 psi  Edge distance/pin diameter = 2.0
Poisson’s Ratio 0.33 0.33
Fatigue Strength 138 MPa 20000 psi  AA; 500,000,000 cycles completely reversed stress; RR Moore machine/specimen
Machinability 70 % 70 %  0-100 Scale of Aluminum Alloys
Shear Modulus 28 GPa 4060 ksi
Shear Strength 283 MPa 41000 psi  AA; Typical

Electrical Properties

Electrical Resistivity 5.82e-006 ohm-cm 5.82e-006 ohm-cm  AA; Typical at 68°F

Thermal Properties

CTE, linear 68°F 23.2 µm/m-°C 12.9 µin/in-°F  AA; Typical; Average over 68-212°F range.
CTE, linear 250°C 24.7 µm/m-°C 13.7 µin/in-°F  Average over the range 20-300ºC
Specific Heat Capacity 0.875 J/g-°C 0.209 BTU/lb-°F
Thermal Conductivity 121 W/m-K 840 BTU-in/hr-ft²-°F  AA; Typical at 77°F
Melting Point 502 – 638 °C 935 – 1180 °F  AA; Typical range based on typical composition for wrought products 1/4 inch thickness or greater. Eutectic melting is not eliminated by homogenization.
Solidus 502 °C 935 °F  AA; Typical
Liquidus 638 °C 1180 °F  AA; Typical

Processing Properties

Annealing Temperature 413 °C 775 °F
Solution Temperature 256 °C 493 °F