2024-T651 Aluminum
2024-T651 aluminum is 2024 aluminum in the T651 temper. To achieve this temper, the metal is solution heat-treated, stress relieved, then artificially aged. The stress relief is accomplished by stretching the metal by an amount that depends on the type of standard wrought product being made (sheet, plate, bar, or forging).
It has the second lowest ductility compared to the other variants of 2024 aluminum.
The graph bars on the material properties cards below compare 2024-T651 aluminum to: 2000-series alloys (top), all aluminum alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
71 GPa 10 x 106 psi
Elongation at Break
4.5 %
Fatigue Strength
120 MPa 17 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
27 GPa 3.9 x 106 psi
Shear Strength
280 MPa 40 x 103 psi
Tensile Strength: Ultimate (UTS)
480 MPa 69 x 103 psi
Tensile Strength: Yield (Proof)
360 MPa 52 x 103 psi
Thermal Properties
Latent Heat of Fusion
390 J/g
Maximum Temperature: Mechanical
200 °C 390 °F
Melting Completion (Liquidus)
640 °C 1180 °F
Melting Onset (Solidus)
500 °C 930 °F
Specific Heat Capacity
880 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
120 W/m-K 70 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
30 % IACS
Electrical Conductivity: Equal Weight (Specific)
90 % IACS
Otherwise Unclassified Properties
Base Metal Price
11 % relative
Calomel Potential
-600 mV
Density
3.0 g/cm3 190 lb/ft3
Embodied Carbon
8.3 kg CO2/kg material
Embodied Energy
150 MJ/kg 65 x 103 BTU/lb
Embodied Water
1140 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
20 MJ/m3
Resilience: Unit (Modulus of Resilience)
910 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
46 points
Strength to Weight: Axial
44 points
Strength to Weight: Bending
45 points
Thermal Diffusivity
46 mm2/s
Thermal Shock Resistance
21 points
Alloy Composition
| Al | 90.7 to 94.7 | |
| Cu | 3.8 to 4.9 | |
| Mg | 1.2 to 1.8 | |
| Mn | 0.3 to 0.9 | |
| Si | 0 to 0.5 | |
| Fe | 0 to 0.5 | |
| Zn | 0 to 0.25 | |
| Zr | 0 to 0.2 | |
| Ti | 0 to 0.15 | |
| Cr | 0 to 0.1 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
EN 754-2: Aluminium and aluminium alloys. Cold drawn rod/bar and tube. Mechanical properties
Aluminum: Properties and Physical Metallurgy, John E. Hatch (editor), 1984
ASTM B209: Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate
EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties
Aluminum Standards and Data, Aluminum Association Inc., 2013
EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993