Materials / Compare
Aluminum 2024-T351 vs. Aluminum 7050-T7451
Compare Aluminum 2024-T351 vs. Aluminum 7050-T7451 strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | 324MPasourcetypical, 0.2% offset, .500 in dia specimen | 469MPasourcetypical, longitudinal, 0.2% offset |
| Ultimate tensile strength | 469MPasourcetypical | 524MPasourcetypical, longitudinal |
| Elongation at break | 19%sourcetypical, in 4D | 11%sourcetypical, longitudinal |
| Young's modulus (stiffness) | 73.1GPasourcetypical | 70.3GPasourcetypical |
| Density | 2,770kg/m³sourcenominal | 2,830kg/m³sourcenominal |
| Strength to weight | 117kN·m/kg | 166kN·m/kg42% higher |
| Stiffness to weight | 26.4MN·m/kg6% higher | 24.8MN·m/kg |
| Poisson's ratio | 0.33sourcetypical (handbook physical constant), all tempers | 0.33sourcetypical (handbook physical constant) |
| Shear modulus | 27.5GPa4% stiffer in shear | 26.4GPa |
| Bulk modulus | 71.7GPa | 68.9GPa |
| Speed of sound | 5,137m/s | 4,984m/s |
| Thermal | ||
| Thermal conductivity | 120W/m·Ksourcetypical, 20 °C | 157W/m·Ksourcetypical, 20 °C31% more heat through a fin |
| Thermal expansion | 22.9µm/m·Ksourcetypical, mean 20-100 °C | 23.5µm/m·Ksourcetypical, mean 20-100 °C |
| 100 mm part over a 50 °C swing | 115µm growth3% less | 118µm growth |
| Specific heat | 875J/kg·Ksourcetypical, at 100 °C | 860J/kg·Ksourcetypical, at 100 °C |
| Heats up and cools (diffusivity) | 49.5mm²/s | 64.5mm²/s30% faster |
| Thermal shock resistance | 15,561W/m | 29,862W/m1.92x more resistant |
| Melting point | 502–638°Csourcemelting range | 524–635°Csourcemelting range |
| Values for | 2024-T4/T351, Kaiser Aluminum sheet, coil & plate typical datasheet; Poisson from MIL-HDBK-5J | 7050-T7451 plate, Kaiser Aluminum sheet, coil & plate typical datasheet (longitudinal); Poisson from MIL-HDBK-5J |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Is Aluminum 2024-T351 stronger than Aluminum 7050-T7451?
Aluminum 7050-T7451 is stronger: its yield strength is 469 MPa against 324 MPa for Aluminum 2024-T351 (45%).
Which is lighter, Aluminum 2024-T351 or Aluminum 7050-T7451?
Aluminum 2024-T351 is lighter: 2,770 kg/m³ against 2,830 kg/m³ for Aluminum 7050-T7451.
Which is stiffer, Aluminum 2024-T351 or Aluminum 7050-T7451?
Aluminum 2024-T351 is stiffer: Young's modulus 73.1 GPa against 70.3 GPa for Aluminum 7050-T7451, so the same part in Aluminum 2024-T351 deflects less under the same load.
Which is lighter for the same job, Aluminum 2024-T351 or Aluminum 7050-T7451?
For the same stiffness or strength: Aluminum 2024-T351 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate; Aluminum 7050-T7451 is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Aluminum 2024-T351 | Aluminum 7050-T7451 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 6% heavier |
| Stiff beam (bending) | lighter | 4% heavier |
| Stiff panel or plate | lighter | 4% heavier |
| Strong rod or tie | 42% heavier | lighter |
| Strong beam | 25% heavier | lighter |
| Strong panel or plate | 18% heavier | lighter |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Aluminum 2024-T351 or Aluminum 7050-T7451?
Aluminum 7050-T7451 conducts heat better: 157 W/m·K against 120 W/m·K for Aluminum 2024-T351.
Which expands less with temperature?
Aluminum 2024-T351 expands less: 22.9 µm/m·K against 23.5 µm/m·K for Aluminum 7050-T7451.