Materials / Compare
FDM ASA vs. Rubber
Compare FDM ASA 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 | not given (tensile used) | not given (tensile used) |
| Ultimate tensile strength | 37MPasourcetypical1.61x stronger | 23MPasourcetypical |
| Flexural strength | 65MPasourcetypical | not sourced |
| Elongation at break | 9.2%sourcetypical | 830%sourcetypical90.2x more ductile |
| Young's modulus (stiffness) | 2.45GPasourcetypical | not sourced |
| Density | 1,050kg/m³sourcetypical | 960kg/m³sourcetypical (specific gravity) |
| Strength to weight | 35.2kN·m/kg47% higher | 24kN·m/kg |
| Stiffness to weight | 2.33MN·m/kg | not sourced |
| Poisson's ratio | not sourced | 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 | not sourced | not sourced |
| Bulk modulus | not sourced | not sourced |
| Speed of sound | 1,528m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 0.17W/m·Ksourcebase material: INEOS Styrolution Luran S 777K injection-molding ASA, typical | 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·Ksourcebase material: INEOS Styrolution Luran S 777K injection-molding ASA, range | 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 | not sourced | not sourced |
| Max service temperature | 92°CsourceHDT 1.8 MPa | 70°Csourcecontinuous use operating range |
| Values for | Bambu Lab ASA, TDS V3.0, printed specimens X-Y; nozzle 260 °C, bed 80 °C, 200 mm/s, 100% infill; annealed and dried 80 °C for 12 h before testing. | 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.
FDM ASA is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is FDM ASA stronger than Rubber?
FDM ASA is stronger: its tensile strength is 37 MPa against 23 MPa for Rubber (1.61x).
Which is lighter, FDM ASA or Rubber?
Rubber is lighter: 960 kg/m³ against 1,050 kg/m³ for FDM ASA.
Which is lighter for the same job, FDM ASA or Rubber?
For the same stiffness or strength: FDM ASA is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | FDM ASA | Rubber |
|---|---|---|
| Strong rod or tie | lighter | 47% heavier |
| Strong beam | lighter | 26% heavier |
| Strong panel or plate | lighter | 16% 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 is more ductile, FDM ASA or Rubber?
Rubber stretches further before it breaks: 830% elongation at break against 9.2% for FDM ASA.
Which conducts heat better, FDM ASA or Rubber?
FDM ASA conducts heat better: 0.17 W/m·K against 0.151 W/m·K for Rubber.