Materials / Compare
Nickel Inconel 718 vs. Rubber
Compare Nickel Inconel 718 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 | 1,207MPasourcetypical, 1.0 in. hot-rolled bar, 0.2% offset | not given (tensile used) |
| Ultimate tensile strength | 1,389MPasourcetypical, 1.0 in. bar | 23MPasourcetypical |
| Elongation at break | 20%sourcetypical, 1.0 in. bar | 830%sourcetypical |
| Young's modulus (stiffness) | 200GPasourcetypical, 21 °C, annealed + aged | not sourced |
| Density | 8,221kg/m³sourcenominal, annealed and aged | 960kg/m³sourcetypical (specific gravity) |
| Strength to weight | 147kN·m/kg6.13x higher | 24kN·m/kg |
| Stiffness to weight | 24.3MN·m/kg | not sourced |
| Poisson's ratio | 0.294sourcetypical, 21 °C, annealed + aged | 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 | 77.3GPa | not sourced |
| Bulk modulus | 162GPa | not sourced |
| Speed of sound | 4,932m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 11.4W/m·Ksourcetypical, 21 °C, annealed + aged (calculated from resistivity per footnote a) | 0.151W/m·Ksourcegovernment selected value (US Army Natick Laboratories TR 66-49-PR, 1966), soft vulcanized natural rubber, 25 °C |
| Thermal expansion | 13.2µm/m·Ksourcetypical, mean 21-93 °C, annealed + aged | not sourced |
| 100 mm part over a 50 °C swing | 66µm growth | not sourced |
| Specific heat | 435J/kg·Ksourcetypical, 21 °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) | 3.19mm²/s38.1x faster | 0.0836mm²/s |
| Thermal shock resistance | 3,680W/m | not sourced |
| Melting point | 1,260–1,336°Csourcemelting range | not sourced |
| Max service temperature | 704°Csourceupper use temperature stated by producer | 70°Csourcecontinuous use operating range |
| Values for | INCONEL alloy 718, standard grade, 1750 °F/1 hr anneal + 1325 °F/8 hr F.C. to 1150 °F aged; Special Metals bulletin SMC-045 typical values | 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 Nickel Inconel 718 stronger than Rubber?
Nickel Inconel 718 is stronger: its yield strength is 1,207 MPa against tensile strength 23 MPa for Rubber (52.5x).
Which is lighter, Nickel Inconel 718 or Rubber?
Rubber is lighter: 960 kg/m³ against 8,221 kg/m³ for Nickel Inconel 718.
Which is lighter for the same job, Nickel Inconel 718 or Rubber?
For the same stiffness or strength: Nickel Inconel 718 is lighter for a strong rod or tie, strong beam; Rubber is lighter for a strong panel or plate.
| Part that must be | Nickel Inconel 718 | Rubber |
|---|---|---|
| Strong rod or tie | lighter | 6.13x heavier |
| Strong beam | lighter | 1.64x heavier |
| 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, Nickel Inconel 718 or Rubber?
Nickel Inconel 718 conducts heat better: 11.4 W/m·K against 0.151 W/m·K for Rubber.