Materials / Compare
Plastic ABS (bulk/injection) vs. Rubber
Compare Plastic ABS (bulk/injection) 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 | 45MPasourcetypical, tensile stress at yield 23 °C | not given (tensile used) |
| Ultimate tensile strength | not sourced | 23MPasourcetypical |
| Flexural strength | 65MPasourcetypical, 23 °C | not sourced |
| Elongation at break | 10%sourcenominal strain at break, 23 °C | 830%sourcetypical |
| Young's modulus (stiffness) | 2.3GPasourcetypical | not sourced |
| Density | 1,040kg/m³sourcetypical | 960kg/m³sourcetypical (specific gravity) |
| Strength to weight | 43.3kN·m/kg1.81x higher | 24kN·m/kg |
| Stiffness to weight | 2.21MN·m/kg | not sourced |
| Poisson's ratio | 0.39sourcetypical, ABS family (Covestro Part and Mold Design guide, Table 3-1) | 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 | 0.827GPa | not sourced |
| Bulk modulus | 3.48GPa | not sourced |
| Speed of sound | 1,487m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 0.17W/m·Ksourcetypical | 0.151W/m·Ksourcegovernment selected value (US Army Natick Laboratories TR 66-49-PR, 1966), soft vulcanized natural rubber, 25 °C |
| Thermal expansion | 80–110µm/m·Ksourcerange | not sourced |
| 100 mm part over a 50 °C swing | 475µm growth | not sourced |
| Specific heat | not sourced | 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) | not sourced | 0.0836mm²/s |
| Thermal shock resistance | 21.4W/m | not sourced |
| Max service temperature | 94°CsourceHDT 1.8 MPa (annealed 4 h/80 °C) | 70°Csourcecontinuous use operating range |
| Values for | INEOS Styrolution Terluran GP-22 general-purpose injection-molding ABS, ISO typical values (TDS revision 08/01/2022) | 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 Plastic ABS (bulk/injection) stronger than Rubber?
Plastic ABS (bulk/injection) is stronger: its yield strength is 45 MPa against tensile strength 23 MPa for Rubber (1.96x).
Which is lighter, Plastic ABS (bulk/injection) or Rubber?
Rubber is lighter: 960 kg/m³ against 1,040 kg/m³ for Plastic ABS (bulk/injection).
Which is lighter for the same job, Plastic ABS (bulk/injection) or Rubber?
For the same stiffness or strength: Plastic ABS (bulk/injection) is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Plastic ABS (bulk/injection) | Rubber |
|---|---|---|
| Strong rod or tie | lighter | 1.81x heavier |
| Strong beam | lighter | 44% heavier |
| Strong panel or plate | lighter | 29% 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, Plastic ABS (bulk/injection) or Rubber?
Plastic ABS (bulk/injection) conducts heat better: 0.17 W/m·K against 0.151 W/m·K for Rubber.