Materials / Compare
Brass C260 vs. Rubber
Compare Brass C260 vs. Rubber 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 | 345MPasourcenominal, strip/flat, 0.5% extension (not 0.2% offset) | not given (tensile used) |
| Ultimate tensile strength | 427MPasourcenominal, strip/flat | 23MPasourcetypical |
| Elongation at break | 23%sourcenominal, in 2.0 in., strip/flat | 830%sourcetypical |
| Young's modulus (stiffness) | 110GPasourcetypical, temper-independent | not sourced |
| Density | 8,525kg/m³sourcenominal | 960kg/m³sourcetypical (specific gravity) |
| Strength to weight | 40.5kN·m/kg1.69x higher | 24kN·m/kg |
| Stiffness to weight | 12.9MN·m/kg | not sourced |
| Poisson's ratio | 0.34sourcereference value at room temperature (Wieland-M30 = CuZn30 = C26000, rolled products) | 0.5sourcegovernment (NBS J. Res. 68A, 1964): computed by NBS for peroxide-cured gum NR vulcanizate, 25 °C, infinitesimal deformation0.49 in the solver: the linear element locks as the ratio nears 0.5 (nearly incompressible). |
| Shear modulus | 41.2GPa | not sourced |
| Bulk modulus | 115GPa | not sourced |
| Speed of sound | 3,597m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 121W/m·Ksourcetypical, 20 °C | 0.151W/m·Ksourcegovernment selected value (US Army Natick Laboratories TR 66-49-PR, 1966), soft vulcanized natural rubber, 25 °C |
| Thermal expansion | 20µm/m·Ksourcetypical, mean 20-300 °C | not sourced |
| 100 mm part over a 50 °C swing | 100µm growth | not sourced |
| Specific heat | 377J/kg·Ksourcetypical, 20 °C | 1,881J/kg·Ksourcegovernment (NBS J. Res. 68A, Table 7; values observed for unvulcanized NR by Bekkedahl and Matheson), 25 °C |
| Heats up and cools (diffusivity) | 37.7mm²/s451x faster | 0.0836mm²/s |
| Thermal shock resistance | 12,510W/m | not sourced |
| Melting point | 916–954°Csourcesolidus-liquidus | not sourced |
| Max service temperature | not sourced | 70°Csourcecontinuous use operating range |
| Values for | C26000 cartridge brass, H02 half hard flat/strip: CDA Electronic Connector Design Guide (mechanical) + CDA alloy page (physical) | Weir Minerals Linatex Premium rubber (95 % natural rubber), typical physical properties, spec sheet WMD0118/202305 |
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 Brass C260 stronger than Rubber?
Brass C260 is stronger: its yield strength is 345 MPa against tensile strength 23 MPa for Rubber (15x).
Which is lighter, Brass C260 or Rubber?
Rubber is lighter: 960 kg/m³ against 8,525 kg/m³ for Brass C260.
Which is lighter for the same job, Brass C260 or Rubber?
For the same stiffness or strength: Brass C260 is lighter for a strong rod or tie; Rubber is lighter for a strong beam, strong panel or plate.
| Part that must be | Brass C260 | Rubber |
|---|---|---|
| Strong rod or tie | lighter | 1.69x heavier |
| Strong beam | 46% heavier | lighter |
| Strong panel or plate | 2.29x 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, Brass C260 or Rubber?
Brass C260 conducts heat better: 121 W/m·K against 0.151 W/m·K for Rubber.