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. % Al 90.7 - 94.7   Cr Max 0.1   Cu 3.8 - 4.9   Fe Max 0.5

Component    Wt. % Mg 1.2 - 1.8   Mn 0.3 - 0.9   Other, each Max 0.05   Other, total Max 0.15

Component    Wt. % Si Max 0.5   Ti Max 0.15   Zn Max 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 Has largely superceded 2017 for structural applications.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 Properties	Metric	English	Comments
Density	2.78 g/cc	0.1 lb/in³	AA; Typical
Mechanical Properties
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	Min 455 MPa	Min 66000 psi
Tensile Strength, Yield	Min 400 MPa	Min 58000 psi
Elongation at Break	5 %	5 %
Modulus of Elasticity	72.4 GPa	10500 ksi	Estimated from other heat treatments.
Poisson's Ratio	0.33	0.33	Estimated from other heat treatments.
Fatigue Strength	117 MPa	17000 psi	500,000,000 cycles; 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 GPa	3920 ksi	Estimated from similar Al alloys.
Shear Strength	296 MPa	42900 psi
Electrical Properties
Electrical Resistivity	4.5e-006 ohm-cm	4.5e-006 ohm-cm
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
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 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

References for this datasheet.