Materials / Compare
Aluminum 7075-T6 vs. Brass C260
Compare Aluminum 7075-T6 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 | 503MPasourcetypical, 0.2% offset, .500 in dia specimen | 345MPasourcenominal, strip/flat, 0.5% extension (not 0.2% offset) |
| Ultimate tensile strength | 572MPasourcetypical | 427MPasourcenominal, strip/flat |
| Elongation at break | 11%sourcetypical, in 4D | 23%sourcenominal, in 2.0 in., strip/flat |
| Young's modulus (stiffness) | 71GPasourcetypical | 110GPasourcetypical, temper-independent |
| Density | 2,800kg/m³sourcenominal3.04x lighter | 8,525kg/m³sourcenominal |
| Strength to weight | 180kN·m/kg4.44x higher | 40.5kN·m/kg |
| Stiffness to weight | 25.4MN·m/kg1.96x 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 | 26.7GPa | 41.2GPa1.54x stiffer in shear |
| Bulk modulus | 69.6GPa | 115GPa |
| Speed of sound | 5,036m/s | 3,597m/s |
| Thermal | ||
| Thermal conductivity | 130W/m·Ksourcetypical, 20 °C, T651 | 121W/m·Ksourcetypical, 20 °C |
| Thermal expansion | 23.4µm/m·Ksourcetypical, mean 20-100 °C | 20µm/m·Ksourcetypical, mean 20-300 °C |
| 100 mm part over a 50 °C swing | 117µm growth | 100µm growth17% less |
| Specific heat | 960J/kg·Ksourcetypical, at 100 °C | 377J/kg·Ksourcetypical, 20 °C |
| Heats up and cools (diffusivity) | 48.4mm²/s28% faster | 37.7mm²/s |
| Thermal shock resistance | 26,370W/m2.11x more resistant | 12,510W/m |
| Melting point | 532–635°Csourcemelting range | 916–954°Csourcesolidus-liquidus |
| Values for | 7075-T6/T651, Kaiser Aluminum rod & bar (mechanical) and sheet/coil/plate (physical) typical datasheets; 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 7075-T6 stronger than Brass C260?
Aluminum 7075-T6 is stronger: its yield strength is 503 MPa against 345 MPa for Brass C260 (46%).
Which is lighter, Aluminum 7075-T6 or Brass C260?
Aluminum 7075-T6 is lighter: 2,800 kg/m³ against 8,525 kg/m³ for Brass C260.
Which is stiffer, Aluminum 7075-T6 or Brass C260?
Brass C260 is stiffer: Young's modulus 110 GPa against 71 GPa for Aluminum 7075-T6, so the same part in Brass C260 deflects less under the same load.
Which is lighter for the same job, Aluminum 7075-T6 or Brass C260?
For the same stiffness or strength: Aluminum 7075-T6 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 7075-T6 | Brass C260 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 1.96x heavier |
| Stiff beam (bending) | lighter | 2.44x heavier |
| Stiff panel or plate | lighter | 2.63x heavier |
| Strong rod or tie | lighter | 4.44x heavier |
| Strong beam | lighter | 3.91x heavier |
| Strong panel or plate | lighter | 3.68x 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 7075-T6 or Brass C260?
Aluminum 7075-T6 conducts heat better: 130 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 23.4 µm/m·K for Aluminum 7075-T6.