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).
not sourced
Shear modulus
not sourced
not sourced
Bulk modulus
not sourced
not sourced
Speed of sound
not sourced
1,332m/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
not sourced
Thermal expansion
not sourced
not sourced
100 mm part over a 50 °C swing
not sourced
not sourced
Specific heat
1,881J/kg·Ksourcegovernment (NBS J. Res. 68A, Table 7; values observed for unvulcanized NR by Bekkedahl and Matheson), 25 °C
EOS PA 2200 (PA12) Material Data Sheet, process parameter 'Balance' at 120 µm layer thickness, X orientation, dry (conditioned values not given). Live MDS status 04.10.2026, last changed 10.09.2026; PDF via ?topdf=... link on the same page.
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.
SLS PA12 Nylon is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Rubber stronger than SLS PA12 Nylon?
SLS PA12 Nylon is stronger: its tensile strength is 48 MPa against 23 MPa for Rubber (2.09x).
Which is lighter, Rubber or SLS PA12 Nylon?
SLS PA12 Nylon is lighter: 930 kg/m³ against 960 kg/m³ for Rubber.
Which is lighter for the same job, Rubber or SLS PA12 Nylon?
For the same stiffness or strength: SLS PA12 Nylon is lighter for a strong rod or tie, strong beam, strong panel or plate.
Part that must be
Rubber
SLS PA12 Nylon
Strong rod or tie
2.15x heavier
lighter
Strong beam
1.69x heavier
lighter
Strong panel or plate
49% heavier
lighter
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, Rubber or SLS PA12 Nylon?
Rubber stretches further before it breaks: 830% elongation at break against 18% for SLS PA12 Nylon.