Materials / Compare
Rubber vs. Steel AISI 1018
Compare Rubber vs. Steel AISI 1018 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) | 372MPasourceproducer-stated, cold drawn |
| Ultimate tensile strength | 23MPasourcetypical | 441MPasourceproducer-stated, cold drawn |
| Elongation at break | 830%sourcetypical | 15%sourcein 2 in (50.8 mm) |
| Young's modulus (stiffness) | not sourced | 200GPasourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Density | 960kg/m³sourcetypical (specific gravity) | 7,861kg/m³sourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Strength to weight | 24kN·m/kg | 47.3kN·m/kg1.98x higher |
| Stiffness to weight | not sourced | 25.4MN·m/kg |
| Poisson's ratio | 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). | 0.32sourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Shear modulus | not sourced | 75.7GPa |
| Bulk modulus | not sourced | 185GPa |
| Speed of sound | not sourced | 5,043m/s |
| Thermal | ||
| Thermal conductivity | 0.151W/m·Ksourcegovernment selected value (US Army Natick Laboratories TR 66-49-PR, 1966), soft vulcanized natural rubber, 25 °C | 51.9W/m·Ksourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Thermal expansion | not sourced | 12µm/m·Ksourcebase material: unalloyed carbon steel, Ovako family table (S275JR, 'none alloyed structural steels', C <= 0.21%); mean 20-300 °C |
| 100 mm part over a 50 °C swing | not sourced | 60µm growth |
| Specific heat | 1,881J/kg·Ksourcegovernment (NBS J. Res. 68A, Table 7; values observed for unvulcanized NR by Bekkedahl and Matheson), 25 °C | 486J/kg·Ksourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Heats up and cools (diffusivity) | 0.0836mm²/s | 13.6mm²/s162x faster |
| Thermal shock resistance | not sourced | 5,473W/m |
| Max service temperature | 70°Csourcecontinuous use operating range | not sourced |
| Values for | Weir Minerals Linatex Premium rubber (95 % natural rubber), typical physical properties, spec sheet WMD0118/202305 | AISI 1018 cold drawn bar (Niagara LaSalle, cold-finished bar producer) |
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 Rubber stronger than Steel AISI 1018?
Steel AISI 1018 is stronger: its yield strength is 372 MPa against tensile strength 23 MPa for Rubber (16.2x).
Which is lighter, Rubber or Steel AISI 1018?
Rubber is lighter: 960 kg/m³ against 7,861 kg/m³ for Steel AISI 1018.
Which is lighter for the same job, Rubber or Steel AISI 1018?
For the same stiffness or strength: Rubber is lighter for a strong beam, strong panel or plate; Steel AISI 1018 is lighter for a strong rod or tie.
| Part that must be | Rubber | Steel AISI 1018 |
|---|---|---|
| Strong rod or tie | 1.98x heavier | lighter |
| Strong beam | lighter | 28% heavier |
| Strong panel or plate | lighter | 2.04x 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, Rubber or Steel AISI 1018?
Steel AISI 1018 conducts heat better: 51.9 W/m·K against 0.151 W/m·K for Rubber.