Materials / Compare
Aluminum 7050-T7451 vs. Brass C260
Compare Aluminum 7050-T7451 vs. Brass C260 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 | 469MPasourcetypical, longitudinal, 0.2% offset | 345MPasourcenominal, strip/flat, 0.5% extension (not 0.2% offset) |
| Ultimate tensile strength | 524MPasourcetypical, longitudinal | 427MPasourcenominal, strip/flat |
| Elongation at break | 11%sourcetypical, longitudinal | 23%sourcenominal, in 2.0 in., strip/flat |
| Young's modulus (stiffness) | 70.3GPasourcetypical | 110GPasourcetypical, temper-independent |
| Density | 2,830kg/m³sourcenominal3.01x lighter | 8,525kg/m³sourcenominal |
| Strength to weight | 166kN·m/kg4.1x higher | 40.5kN·m/kg |
| Stiffness to weight | 24.8MN·m/kg1.92x higher | 12.9MN·m/kg |
| Poisson's ratio | 0.33sourcetypical (handbook physical constant) | 0.34sourcereference value at room temperature (Wieland-M30 = CuZn30 = C26000, rolled products) |
| Shear modulus | 26.4GPa | 41.2GPa1.56x stiffer in shear |
| Bulk modulus | 68.9GPa | 115GPa |
| Speed of sound | 4,984m/s | 3,597m/s |
| Thermal | ||
| Thermal conductivity | 157W/m·Ksourcetypical, 20 °C30% more heat through a fin | 121W/m·Ksourcetypical, 20 °C |
| Thermal expansion | 23.5µm/m·Ksourcetypical, mean 20-100 °C | 20µm/m·Ksourcetypical, mean 20-300 °C |
| 100 mm part over a 50 °C swing | 118µm growth | 100µm growth18% less |
| Specific heat | 860J/kg·Ksourcetypical, at 100 °C | 377J/kg·Ksourcetypical, 20 °C |
| Heats up and cools (diffusivity) | 64.5mm²/s1.71x faster | 37.7mm²/s |
| Thermal shock resistance | 29,862W/m2.39x more resistant | 12,510W/m |
| Melting point | 524–635°Csourcemelting range | 916–954°Csourcesolidus-liquidus |
| Values for | 7050-T7451 plate, Kaiser Aluminum sheet, coil & plate typical datasheet (longitudinal); Poisson from MIL-HDBK-5J | C26000 cartridge brass, H02 half hard flat/strip: CDA Electronic Connector Design Guide (mechanical) + CDA alloy page (physical) |
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 7050-T7451 stronger than Brass C260?
Aluminum 7050-T7451 is stronger: its yield strength is 469 MPa against 345 MPa for Brass C260 (36%).
Which is lighter, Aluminum 7050-T7451 or Brass C260?
Aluminum 7050-T7451 is lighter: 2,830 kg/m³ against 8,525 kg/m³ for Brass C260.
Which is stiffer, Aluminum 7050-T7451 or Brass C260?
Brass C260 is stiffer: Young's modulus 110 GPa against 70.3 GPa for Aluminum 7050-T7451, so the same part in Brass C260 deflects less under the same load.
Which is lighter for the same job, Aluminum 7050-T7451 or Brass C260?
For the same stiffness or strength: Aluminum 7050-T7451 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Aluminum 7050-T7451 | Brass C260 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 1.92x heavier |
| Stiff beam (bending) | lighter | 2.4x heavier |
| Stiff panel or plate | lighter | 2.59x heavier |
| Strong rod or tie | lighter | 4.1x heavier |
| Strong beam | lighter | 3.7x heavier |
| Strong panel or plate | lighter | 3.51x heavier |
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 7050-T7451 or Brass C260?
Aluminum 7050-T7451 conducts heat better: 157 W/m·K against 121 W/m·K for Brass C260.
Which expands less with temperature?
Brass C260 expands less: 20 µm/m·K against 23.5 µm/m·K for Aluminum 7050-T7451.