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 Has largely superseded 2017 for structural applications.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	Metric	English	Comments

Density	2.78 g/cc	0.100 lb/in³	AA; Typical

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	47	47	AA; Typical; 500 g load; 10 mm ball
Tensile Strength, Ultimate	186 MPa	27000 psi	AA; Typical
	<= 220 MPa	<= 31900 psi	Sheet and plate
	<= 220 MPa	<= 31900 psi	Drawn tube
	<= 240 MPa	<= 34800 psi	Wire, rod, and bar (rolled or cold finished)
	<= 240 MPa	<= 34800 psi	Wire, rod, bar and shapes (extruded)
	<= 240 MPa	<= 34800 psi	Extruded tube
	<= 240 MPa	<= 34800 psi	Rivet and cold-heading wire and rod
Tensile Strength, Yield	75.8 MPa	11000 psi	AA; Typical
	<= 95.0 MPa	<= 13800 psi	Sheet and plate
	<= 105 MPa	<= 15200 psi	Drawn tube
	<= 130 MPa	<= 18900 psi	Wire, rod, bar and shapes (extruded)
	<= 130 MPa	<= 18900 psi	Extruded tube
Elongation at Break	>= 12 %	>= 12 %	Sheet and plate
	>= 12 %	>= 12 %	Wire, rod, bar and shapes (extruded)
	>= 12 %	>= 12 %	Extruded tube
	>= 16 %	>= 16 %	Wire, rod, and bar (rolled or cold finished)
	20 % @Thickness 1.59 mm	20 % @Thickness 0.0625 in	AA; Typical
	22 % @Diameter 12.7 mm	22 % @Diameter 0.500 in	AA; Typical
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
Poissons Ratio	0.33	0.33
Fatigue Strength	89.6 MPa @# of Cycles 5.00e+8	13000 psi @# of Cycles 5.00e+8	completely reversed stress; RR Moore machine/specimen
Machinability	30 %	30 %	0-100 Scale of Aluminum Alloys
Shear Modulus	28.0 GPa	4060 ksi
Shear Strength	124 MPa	18000 psi	AA; Typical

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000349 ohm-cm @Temperature 20.0 °C	0.00000349 ohm-cm @Temperature 68.0 °F	AA; Typical

Thermal Properties	Metric	English	Comments
CTE, linear	21.1 µm/m-°C @Temperature -50.0 - 20.0 °C	11.7 µin/in-°F @Temperature -58.0 - 68.0 °F
	22.9 µm/m-°C @Temperature 20.0 - 100 °C	12.7 µin/in-°F @Temperature 68.0 - 212 °F
	23.2 µm/m-°C @Temperature 20.0 - 100 °C	12.9 µin/in-°F @Temperature 68.0 - 212 °F	AA; Typical; average over range
	23.8 µm/m-°C @Temperature 20.0 - 200 °C	13.2 µin/in-°F @Temperature 68.0 - 392 °F
	24.7 µm/m-°C @Temperature 20.0 - 300 °C	13.7 µin/in-°F @Temperature 68.0 - 572 °F
Specific 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 in. thickness. Eutectic melting is not eliminated by homogenization.
Solidus	502 °C	935 °F	AA; Typical
Liquidus	638 °C	1180 °F	AA; Typical

Processing Properties	Metric	English	Comments
Annealing Temperature	413 °C	775 °F
Solution Temperature	493 °C	919 °F

Component Elements Properties	Metric	English	Comments
Aluminum, Al	90.7 - 94.7 %	90.7 - 94.7 %	As remainder
Chromium, Cr	<= 0.10 %	<= 0.10 %
Copper, Cu	3.8 - 4.9 %	3.8 - 4.9 %
Iron, Fe	<= 0.50 %	<= 0.50 %
Magnesium, Mg	1.2 - 1.8 %	1.2 - 1.8 %
Manganese, Mn	0.30 - 0.90 %	0.30 - 0.90 %
Other, each	<= 0.05 %	<= 0.05 %
Other, total	<= 0.15 %	<= 0.15 %
Silicon, Si	<= 0.50 %	<= 0.50 %
Titanium, Ti	<= 0.15 %	<= 0.15 %
Zinc, Zn	<= 0.25 %	<= 0.25 %

References for this datasheet.

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MA2024O / 8864

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