Aluminum 2024-O

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Aluminum 2024-O
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 Has largely superseded 2017 for structural applications. 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. 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-O; UNS A92024; ISO AlCu4Mg1; NF A-U4G1 (France); DIN AlCuMg2; AA2024-O, ASME SB211; CSA CG42 (Canada); Al2024-O
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Physical Properties	Original Value	Comments

Density	2.78 g/cc	AA; Typical

Mechanical Properties	Original Value	Comments
Hardness, Brinell	47	AA; Typical; 500 g load; 10 mm ball
Tensile Strength, Ultimate	27.0 ksi	AA; Typical
	<= 220 MPa	Sheet and plate
	<= 220 MPa	Drawn tube
	<= 240 MPa	Wire, rod, and bar (rolled or cold finished)
	<= 240 MPa	Wire, rod, bar and shapes (extruded)
	<= 240 MPa	Extruded tube
	<= 240 MPa	Rivet and cold-heading wire and rod
Tensile Strength, Yield	11.0 ksi	AA; Typical
	<= 95.0 MPa	Sheet and plate
	<= 105 MPa	Drawn tube
	<= 130 MPa	Wire, rod, bar and shapes (extruded)
	<= 130 MPa	Extruded tube
Elongation at Break	>= 12 %	Sheet and plate
	>= 12 %	Wire, rod, bar and shapes (extruded)
	>= 12 %	Extruded tube
	>= 16 %	Wire, rod, and bar (rolled or cold finished)
	20 % @Thickness 1.59 mm	AA; Typical
	22 % @Diameter 12.7 mm	AA; Typical
Modulus of Elasticity	10600 ksi	AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Ultimate Bearing Strength	345 MPa	Edge distance/pin diameter = 2.0
Bearing Yield Strength	131 MPa	Edge distance/pin diameter = 2.0
Poissons Ratio	0.33
Fatigue Strength	13000 psi @# of Cycles 5.00e+8	completely reversed stress; RR Moore machine/specimen
Machinability	30 %	0-100 Scale of Aluminum Alloys
Shear Modulus	28.0 GPa
Shear Strength	18.0 ksi	AA; Typical

Electrical Properties	Original Value	Comments
Electrical Resistivity	21.0 ohm-cir-mil/ft @Temperature 20.0 °C	AA; Typical

Thermal Properties	Original Value	Comments
CTE, linear	12.9 µin/in-°F @Temperature 20.0 - 100 °C	AA; Typical; average over range
	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	1340 BTU-in/hr-ft²-°F	AA; Typical at 77°F
Melting Point	935 - 1180 °F	AA; Typical range based on typical composition for wrought products >= 1/4 in. thickness. Eutectic melting is not eliminated by homogenization.
Solidus	935 °F	AA; Typical
Liquidus	1180 °F	AA; Typical

Processing Properties	Original Value	Comments
Annealing Temperature	775 °F
Solution Temperature	493 °C

Component Elements Properties	Original Value	Comments
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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MA2024O / 8864

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