Aluminum 2024-O


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-O; UNS A92024; ISO AlCu4Mg1; NF A-U4G1 (France); DIN AlCuMg2; AA2024-O, ASME SB211; CSA CG42 (Canada)

Component   Wt. %
Al90.7 - 94.7 
CrMax 0.1 
Cu3.8 - 4.9 
FeMax 0.5 
Component   Wt. %
Mg1.2 - 1.8 
Mn0.3 - 0.9 
Other, eachMax 0.05 
Other, totalMax 0.15 
Component   Wt. %
SiMax 0.5 
TiMax 0.15 
ZnMax 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 Has largely superceded 2017 for structural applications. Use of 2024-O not recommended unless subsequently heat treated.

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.

Physical PropertiesMetricEnglishComments
Density2.78 g/cc0.1 lb/in AA; Typical

Mechanical Properties
Hardness, Brinell4747 AA; Typical; 500 g load; 10 mm ball
Ultimate Tensile Strength186 MPa27000 psi AA; Typical
Tensile Yield Strength75.8 MPa11000 psi AA; Typical
Elongation at Break20 %20 % AA; Typical; 1/16 in. (1.6 mm) Thickness
Elongation at Break22 %22 % AA; Typical; 1/2 in. (12.7 mm) Diameter
Modulus of Elasticity73.1 GPa10600 ksi AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Ultimate Bearing Strength345 MPa50000 psi Edge distance/pin diameter = 2.0
Bearing Yield Strength131 MPa19000 psi Edge distance/pin diameter = 2.0
Poisson's Ratio0.330.33 
Fatigue Strength89.6 MPa13000 psi AA; 500,000,000 cycles completely reversed stress; RR Moore machine/specimen
Machinability30 %30 % 0-100 Scale of Aluminum Alloys
Shear Modulus28 GPa4060 ksi 
Shear Strength124 MPa18000 psi AA; Typical

Electrical Properties
Electrical Resistivity3.49e-006 ohm-cm3.49e-006 ohm-cm AA; Typical at 68F

Thermal Properties
CTE, linear 68F23.2 m/m-C12.9 in/in-F AA; Typical; Average over 68-212F range.
CTE, linear 250C24.7 m/m-C13.7 in/in-F Average over the range 20-300C
Specific Heat Capacity0.875 J/g-C0.209 BTU/lb-F 
Thermal Conductivity193 W/m-K1340 BTU-in/hr-ft-F AA; Typical at 77F
Melting Point502 - 638 C935 - 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.
Solidus502 C935 F AA; Typical
Liquidus638 C1180 F AA; Typical

Processing Properties
Annealing Temperature413 C775 F 
Solution Temperature256 C493 F 

References for this datasheet.


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