Materials / Compare
Magnesium AZ31B-H24 vs. Rubber
Compare Magnesium AZ31B-H24 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 | 220MPasourcetypical, H24, 0.5-6 mm, 0.2 % proof stress | not given (tensile used) |
| Ultimate tensile strength | 290MPasourcetypical, H24, 0.5-6 mm | 23MPasourcetypical |
| Elongation at break | 13%sourcetypical, H24, 0.5-6 mm, gauge 5.65√A | 830%sourcetypical |
| Young's modulus (stiffness) | 44.8GPasourcetypical (handbook physical constant) | not sourced |
| Density | 1,769kg/m³sourcenominal | 960kg/m³sourcetypical (specific gravity) |
| Strength to weight | 124kN·m/kg5.19x higher | 24kN·m/kg |
| Stiffness to weight | 25.3MN·m/kg | not sourced |
| Poisson's ratio | 0.35sourcetypical (handbook physical constant) | 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 | 16.6GPa | not sourced |
| Bulk modulus | 49.8GPa | not sourced |
| Speed of sound | 5,032m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 76.9W/m·Ksourcetypical (temper/temperature not stated) | 0.151W/m·Ksourcegovernment selected value (US Army Natick Laboratories TR 66-49-PR, 1966), soft vulcanized natural rubber, 25 °C |
| Thermal expansion | 26.8µm/m·Ksourcetypical (temperature range not stated) | not sourced |
| 100 mm part over a 50 °C swing | 134µm growth | not sourced |
| Specific heat | 1,040J/kg·Ksourcetypical | 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) | 41.8mm²/s500x faster | 0.0836mm²/s |
| Thermal shock resistance | 9,159W/m | not sourced |
| Max service temperature | 149°Csourcestated application limit | 70°Csourcecontinuous use operating range |
| Values for | AZ31B-H24 sheet 0.016-0.062 in., MIL-HDBK-5J Table 4.2.1.0(b) (AMS 4377); strengths are S-basis MINIMUMS | 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 Magnesium AZ31B-H24 stronger than Rubber?
Magnesium AZ31B-H24 is stronger: its yield strength is 220 MPa against tensile strength 23 MPa for Rubber (9.57x).
Which is lighter, Magnesium AZ31B-H24 or Rubber?
Rubber is lighter: 960 kg/m³ against 1,769 kg/m³ for Magnesium AZ31B-H24.
Which is lighter for the same job, Magnesium AZ31B-H24 or Rubber?
For the same stiffness or strength: Magnesium AZ31B-H24 is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Magnesium AZ31B-H24 | Rubber |
|---|---|---|
| Strong rod or tie | lighter | 5.19x heavier |
| Strong beam | lighter | 2.45x heavier |
| Strong panel or plate | lighter | 1.68x 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, Magnesium AZ31B-H24 or Rubber?
Magnesium AZ31B-H24 conducts heat better: 76.9 W/m·K against 0.151 W/m·K for Rubber.