Aluminum 2024-T851

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Aluminum 2024-T851
Categories:	Metal; Nonferrous Metal; Aluminum Alloy; 2000 Series Aluminum Alloy
Material Notes:	Weldability = C; Stress Corrosion Cracking Resistance = B; General Corrosion Resistance = D (A = best; E = worst). Good machinability and surface finish capabilities. A high strength material of adequate workability. Has largely superseded 2017 for structural applications.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. Some data provided by Alcoa. 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-T851; AA2024-T851; UNS A92024; Al2024-T851
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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	128	128	500 kg load/10 mm ball
Hardness, Knoop	161	161	Estimated from Brinell
Hardness, Rockwell A	49	49	Estimated from Brinell
Hardness, Rockwell B	79	79	Estimated from Brinell
Hardness, Vickers	146	146	Estimated from Brinell
Tensile Strength, Ultimate	>= 455 MPa	>= 66000 psi
	>= 455 MPa	>= 66000 psi	Wire, rod, and bar (rolled or cold finished)
	34.0 MPa @Temperature 371 °C	4930 psi @Temperature 700 °F
	52.0 MPa @Temperature 316 °C	7540 psi @Temperature 601 °F
	76.0 MPa @Temperature 260 °C	11000 psi @Temperature 500 °F
	186 MPa @Temperature 204 °C	27000 psi @Temperature 399 °F
	379 MPa @Temperature 149 °C	55000 psi @Temperature 300 °F
	455 MPa @Temperature 100 °C	66000 psi @Temperature 212 °F
	483 MPa @Temperature 24.0 °C	70100 psi @Temperature 75.2 °F
	503 MPa @Temperature -28.0 °C	73000 psi @Temperature -18.4 °F
	510 MPa @Temperature -80.0 °C	74000 psi @Temperature -112 °F
	586 MPa @Temperature -196 °C	85000 psi @Temperature -321 °F
	>= 455 MPa @Thickness 12.7 - 25.4 mm	>= 66000 psi @Thickness 0.500 - 1.00 in	Plate
	>= 455 MPa @Thickness 25.43 - 38.07 mm	>= 66000 psi @Thickness 1.001 - 1.499 in	Plate
	>= 460 MPa @Thickness 6.35 - 12.7 mm	>= 66700 psi @Thickness 0.250 - 0.499 in	Plate
	>= 440 MPa @Diameter 1.27 - 6.32 mm	>= 63800 psi @Diameter 0.0500 - 0.249 in	Extruded tube; T8510, T8511
	>= 440 MPa @Diameter 1.27 - 6.32 mm	>= 63800 psi @Diameter 0.0500 - 0.249 in	Wire, rod, bar and shapes (extruded); T851, T8510, T8511
	>= 455 MPa @Diameter 6.35 - 38.1 mm	>= 66000 psi @Diameter 0.250 - 1.50 in	Wire, rod, bar and shapes (extruded); T851, T8510, T8511
	>= 455 MPa @Diameter 6.35 - 38.1 mm	>= 66000 psi @Diameter 0.250 - 1.50 in	Extruded tube; T8510, T8511
Tensile Strength, Yield	>= 400 MPa	>= 58000 psi
	>= 400 MPa	>= 58000 psi	Wire, rod, and bar (rolled or cold finished)
	>= 395 MPa @Thickness 25.43 - 38.07 mm	>= 57300 psi @Thickness 1.001 - 1.499 in	Plate
	>= 400 MPa @Thickness 6.35 - 12.7 mm	>= 58000 psi @Thickness 0.250 - 0.499 in	Plate
	>= 400 MPa @Thickness 12.7 - 25.4 mm	>= 58000 psi @Thickness 0.500 - 1.00 in	Plate
	>= 385 MPa @Diameter 1.27 - 6.32 mm	>= 55800 psi @Diameter 0.0500 - 0.249 in	Wire, rod, bar and shapes (extruded); T851, T8510, T8511
	>= 385 MPa @Diameter 1.27 - 6.32 mm	>= 55800 psi @Diameter 0.0500 - 0.249 in	Extruded tube; T8510, T8511
	>= 400 MPa @Diameter 6.35 - 38.1 mm	>= 58000 psi @Diameter 0.250 - 1.50 in	Wire, rod, bar and shapes (extruded); T851, T8510, T8511
	>= 400 MPa @Diameter 6.35 - 38.1 mm	>= 58000 psi @Diameter 0.250 - 1.50 in	Extruded tube; T8510, T8511
	28.0 MPa @Strain 0.2 %, Temperature 371 °C	4060 psi @Strain 0.2 %, Temperature 700 °F
	41.0 MPa @Strain 0.2 %, Temperature 316 °C	5950 psi @Strain 0.2 %, Temperature 601 °F
	62.0 MPa @Strain 0.2 %, Temperature 260 °C	8990 psi @Strain 0.2 %, Temperature 500 °F
	138 MPa @Strain 0.2 %, Temperature 204 °C	20000 psi @Strain 0.2 %, Temperature 399 °F
	338 MPa @Strain 0.2 %, Temperature 149 °C	49000 psi @Strain 0.2 %, Temperature 300 °F
	427 MPa @Strain 0.2 %, Temperature 100 °C	61900 psi @Strain 0.2 %, Temperature 212 °F
	448 MPa @Strain 0.2 %, Temperature 24.0 °C	65000 psi @Strain 0.2 %, Temperature 75.2 °F
	469 MPa @Strain 0.2 %, Temperature -28.0 °C	68000 psi @Strain 0.2 %, Temperature -18.4 °F
	476 MPa @Strain 0.2 %, Temperature -80.0 °C	69000 psi @Strain 0.2 %, Temperature -112 °F
	538 MPa @Strain 0.2 %, Temperature -196 °C	78000 psi @Strain 0.2 %, Temperature -321 °F
Elongation at Break	5.0 %	5.0 %
	>= 5.0 %	>= 5.0 %	Wire, rod, and bar (rolled or cold finished)
	7.0 % @Temperature -80.0 °C	7.0 % @Temperature -112 °F
	7.0 % @Temperature -28.0 °C	7.0 % @Temperature -18.4 °F
	7.0 % @Temperature 24.0 °C	7.0 % @Temperature 75.2 °F
	8.0 % @Temperature -196 °C	8.0 % @Temperature -321 °F
	8.0 % @Temperature 100 °C	8.0 % @Temperature 212 °F
	11 % @Temperature 149 °C	11 % @Temperature 300 °F
	23 % @Temperature 204 °C	23 % @Temperature 399 °F
	55 % @Temperature 260 °C	55 % @Temperature 500 °F
	75 % @Temperature 316 °C	75 % @Temperature 601 °F
	100 % @Temperature 371 °C	100 % @Temperature 700 °F
	>= 5.0 % @Thickness 6.35 - 12.7 mm	>= 5.0 % @Thickness 0.250 - 0.499 in	Plate
	>= 5.0 % @Thickness 12.7 - 25.4 mm	>= 5.0 % @Thickness 0.500 - 1.00 in	Plate
	>= 5.0 % @Thickness 25.43 - 38.07 mm	>= 5.0 % @Thickness 1.001 - 1.499 in	Plate
	>= 4.0 % @Diameter 1.27 - 6.32 mm	>= 4.0 % @Diameter 0.0500 - 0.249 in	Wire, rod, bar and shapes (extruded); T851, T8510, T8511
	>= 4.0 % @Diameter 1.27 - 6.32 mm	>= 4.0 % @Diameter 0.0500 - 0.249 in	Extruded tube; T8510, T8511
	>= 5.0 % @Diameter 6.35 - 38.1 mm	>= 5.0 % @Diameter 0.250 - 1.50 in	Wire, rod, bar and shapes (extruded); T851, T8510, T8511
	>= 5.0 % @Diameter 6.35 - 38.1 mm	>= 5.0 % @Diameter 0.250 - 1.50 in	Extruded tube; T8510, T8511
Modulus of Elasticity	72.4 GPa	10500 ksi	Estimated from other heat treatments.
Poissons Ratio	0.33	0.33	Estimated from other heat treatments.
Fatigue Strength	117 MPa @# of Cycles 5.00e+8	17000 psi @# of Cycles 5.00e+8	completely reversed; R. R. Moore Machine and specimen.
Machinability	70 %	70 %	0-100 Scale (A=90; B=70; C=50; D=30; E=10)
Shear Modulus	27.0 GPa	3920 ksi	Estimated from similar Al alloys.
Shear Strength	296 MPa	42900 psi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000450 ohm-cm	0.00000450 ohm-cm

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	151 W/m-K	1050 BTU-in/hr-ft²-°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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MA2024T851 / 8870

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