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).
0.3sourcedesign value (structural stainless steels)
Shear modulus
not sourced
76.9GPa
Bulk modulus
not sourced
167GPa
Speed of sound
not sourced
5,032m/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
1.4305 / UNS S30300, Outokumpu typical values (hot rolled, solution annealed) from 'Steel Grades, Properties and Global Standards'; max service from Carpenter CarTech 303 datasheet
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 Stainless 303?
Stainless 303 is stronger: its yield strength is 275 MPa against tensile strength 23 MPa for Rubber (12x).
Which is lighter, Rubber or Stainless 303?
Rubber is lighter: 960 kg/m³ against 7,900 kg/m³ for Stainless 303.
Which is lighter for the same job, Rubber or Stainless 303?
For the same stiffness or strength: Rubber is lighter for a strong beam, strong panel or plate; Stainless 303 is lighter for a strong rod or tie.
Part that must be
Rubber
Stainless 303
Strong rod or tie
45% heavier
lighter
Strong beam
lighter
1.57x heavier
Strong panel or plate
lighter
2.38x 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 Stainless 303?
Stainless 303 conducts heat better: 15 W/m·K against 0.151 W/m·K for Rubber.