Rubber vs. SLA Resin Elastic 50A

Compare Rubber vs. SLA Resin Elastic 50A strength, stiffness, weight and thermal properties.

Change either side

RubberBulk polymer (molded or machined)

SLA Resin Elastic 50A3D printed (SLA resin)

Mechanical
Try it on a partA bracket to run stress or thermal on, free in your browser	Open in LessCAD	Open in LessCAD
Yield strength	not given (tensile used)	not given (tensile used)
Ultimate tensile strength	23MPasourcetypical6.76x stronger	3.4MPasourcetypical
Elongation at break	830%sourcetypical5.19x more ductile	160%sourcetypical
Young's modulus (stiffness)	not sourced	not sourced
Density	960kg/m³sourcetypical (specific gravity)	1,010kg/m³sourcetypical
Strength to weight	24kN·m/kg7.12x higher	3.37kN·m/kg
Stiffness to weight	not sourced	not sourced
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).	not sourced
Shear modulus	not sourced	not sourced
Bulk modulus	not sourced	not sourced
Speed of sound	not sourced	not sourced
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	not sourced
Heats up and cools (diffusivity)	0.0836mm²/s	not sourced
Thermal shock resistance	not sourced	not sourced
Glass transition	not sourced	-34.5°CsourceDMA
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	Formlabs Elastic 50A Resin V2 (FLELCL02), TDS Rev. 01 24.01.2024; parts printed on Form 3, 100 µm, Elastic 50A V2 settings and post-processing; tensile on Die C specimens cut from printed sheets after 3+ h at 23 °C.

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.

SLA Resin Elastic 50A is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Is Rubber stronger than SLA Resin Elastic 50A?

Rubber is stronger: its tensile strength is 23 MPa against 3.4 MPa for SLA Resin Elastic 50A (6.76x).

Which is lighter, Rubber or SLA Resin Elastic 50A?

Rubber is lighter: 960 kg/m³ against 1,010 kg/m³ for SLA Resin Elastic 50A.

Which is lighter for the same job, Rubber or SLA Resin Elastic 50A?

For the same stiffness or strength: Rubber is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must be	Rubber	SLA Resin Elastic 50A
Strong rod or tie	lighter	7.12x heavier
Strong beam	lighter	3.76x heavier
Strong panel or plate	lighter	2.74x 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 is more ductile, Rubber or SLA Resin Elastic 50A?

Rubber stretches further before it breaks: 830% elongation at break against 160% for SLA Resin Elastic 50A.

Among 59 materials

Stiffness against density

Strength against density