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Aluminum 2024-O
Subcategory:
2000 Series Aluminum Alloy; Aluminum Alloy; Metal; Nonferrous Metal
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. %
Al 90.7 - 94.7
Cr Max 0.1
Cu 3.8 - 4.9
Fe Max 0.5
Mg 1.2 - 1.8
Mn 0.3 - 0.9
 
Component   Wt. %
Other, each Max 0.05
Other, total Max 0.15
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 Has largely superceded 2017 for structural applications. 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 Properties Metric English Comments
Density 2.78 g/cc 0.1 lb/in³ AA; Typical
 
  Mechanical Properties
   
Hardness, Brinell
 47
 47
 AA; Typical; 500 g load; 10 mm ball
Ultimate Tensile Strength 186 MPa 27000 psi AA; Typical
Tensile Yield Strength 75.8 MPa 11000 psi AA; Typical
Elongation at Break 20 % 20 % AA; Typical; 1/16 in. (1.6 mm) Thickness
Elongation at Break 22 % 22 % AA; Typical; 1/2 in. (12.7 mm) Diameter
Modulus of Elasticity 73.1 GPa 10600 ksi AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Ultimate Bearing Strength 345 MPa 50000 psi Edge distance/pin diameter = 2.0
Bearing Yield Strength 131 MPa 19000 psi Edge distance/pin diameter = 2.0
Poisson's Ratio 0.33 0.33  
Fatigue Strength 89.6 MPa 13000 psi AA; 500,000,000 cycles completely reversed stress; RR Moore machine/specimen
Machinability 30 % 30 % 0-100 Scale of Aluminum Alloys
Shear Modulus 28 GPa 4060 ksi  
Shear Strength 124 MPa 18000 psi AA; Typical
 
 
  Electrical Properties
Electrical Resistivity 3.49e-006 ohm-cm 3.49e-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
Heat Capacity 0.875 J/g-°C 0.209 BTU/lb-°F  
Thermal Conductivity 193 W/m-K 1340 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  
 
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