Aluminum 2024-T851


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-T851; AA2024-T851; UNS A92024

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:
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 Has largely superceded 2017 for structural applications.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.

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

Mechanical Properties
Hardness, Brinell128128 500 kg load/10 mm ball
Hardness, Knoop161161 Estimated from Brinell
Hardness, Rockwell A4949 Estimated from Brinell
Hardness, Rockwell B7979 Estimated from Brinell
Hardness, Vickers146146 Estimated from Brinell
Tensile Strength, UltimateMin 455 MPaMin 66000 psi 
Tensile Strength, YieldMin 400 MPaMin 58000 psi 
Elongation at Break5 %5 % 
Modulus of Elasticity72.4 GPa10500 ksi Estimated from other heat treatments.
Poisson's Ratio0.330.33 Estimated from other heat treatments.
Fatigue Strength117 MPa17000 psi 500,000,000 cycles; completely reversed; R. R. Moore Machine and specimen.
Machinability70 %70 % 0-100 Scale (A=90; B=70; C=50; D=30; E=10)
Shear Modulus27 GPa3920 ksi Estimated from similar Al alloys.
Shear Strength296 MPa42900 psi 

Electrical Properties
Electrical Resistivity4.5e-006 ohm-cm4.5e-006 ohm-cm 

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 Conductivity151 W/m-K1050 BTU-in/hr-ft-F 
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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