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)
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.