SLA Resin Elastic 50A vs. SLA Resin Standard

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

SLA Resin Elastic 50A3D printed (SLA resin)

SLA Resin Standard3D printed (SLA resin)

Mechanical	SLA Resin Elastic 50A	SLA Resin Standard
Yield strength	not given (tensile used)	not given (tensile used)
Ultimate tensile strength	3.4MPa1	60MPa217.6x stronger
Flexural strength	not sourced	105MPa2
Elongation at break	160%120x more ductile	8%2
Young's modulus (stiffness)	not sourced	2.75GPa2
Density	1,010kg/m³120% lighter	1,210kg/m³3
Strength to weight	3.37kN·m/kg	49.6kN·m/kg14.7x higher
Stiffness to weight	not sourced	2.27MN·m/kg
Poisson's ratio	not sourced	not sourced
Shear modulus	not sourced	not sourced
Bulk modulus	not sourced	not sourced
Speed of sound	not sourced	1,508m/s

Stiffness against densityHigher and further left: stiffer for its weight

Strength against densityHigher and further left: stronger for its weight

Thermal	SLA Resin Elastic 50A	SLA Resin Standard
Thermal conductivity	not sourced	0.54W/m·K4
Thermal expansion	not sourced	mean -30 to 140 °C114µm/m·K4
100 mm part over a 50 °C swing	not sourced	571µm growth
Specific heat	not sourced	1,800J/kg·K4
Heats up and cools (diffusivity)	not sourced	0.248mm²/s
Thermal shock resistance	not sourced	not sourced
Glass transition	DMA-34.5°C1	not sourced
Max service temperature	not sourced	HDT 1.8 MPa59°C2

Thermal conductivity against densityHigher and further left: spreads more heat for its weight

Thermal expansion against thermal conductivityLower and further right: warps less when heated

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Sources4 documents: Formlabs

SLA Resin Elastic 50A: 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.
SLA Resin Standard: Formlabs Clear Resin V5 (FLGPCL05), TDS Rev. 01 March 20, 2024; printed on Form 4 at 100 µm, washed 5 min in >=99% IPA, post-cured 15 min at 60 °C in Form Cure. Orientation not stated.

1
Elastic 50A Resin V2 Technical Data Sheet (2024)Formlabsarchived copySLA Resin Elastic 50A · Ultimate tensile strength: typicalSLA Resin Elastic 50A · Elongation at break: typicalSLA Resin Elastic 50A · Density: typicalSLA Resin Elastic 50A · Glass transition: DMA
2
Clear Resin V5 Technical Data Sheet (2024)Formlabsarchived copySLA Resin Standard · Ultimate tensile strength: typicalSLA Resin Standard · Flexural strength: typicalSLA Resin Standard · Elongation at break: typicalSLA Resin Standard · Young's modulus (stiffness): typicalSLA Resin Standard · Max service temperature: HDT 1.8 MPa
3
Clear Resin V5 Technical Data Sheet (web edition)FormlabsSLA Resin Standard · Density: typical, post-cured (same for 5 min ambient and 15 min at 60 °C), ASTM D792
4
Thermal Properties of Selected Formlabs SLA ResinsFormlabsSLA Resin Standard · Thermal conductivity: typical, post-cured, ASTM E1530SLA Resin Standard · Thermal expansion: mean -30 to 140 °C, post-cured (5 min ambient cure), TMA ASTM E831SLA Resin Standard · Specific heat: typical, 25 °C, post-cured (5 min ambient cure), DSC ASTM E1269

Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "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 and SLA Resin Standard are 3D printed: their properties depend on build direction and print settings; these are typical values.

Questions

Mechanical

Is SLA Resin Elastic 50A stronger than SLA Resin Standard?

SLA Resin Standard is stronger: its tensile strength is 60 MPa against 3.4 MPa for SLA Resin Elastic 50A (17.6x).

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

SLA Resin Elastic 50A is lighter: 1,010 kg/m³ against 1,210 kg/m³ for SLA Resin Standard.

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

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

Part that must be	SLA Resin Elastic 50A	SLA Resin Standard
Strong rod or tie	14.7x heavier	lighter
Strong beam	5.66x heavier	lighter
Strong panel or plate	3.51x 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, SLA Resin Elastic 50A or SLA Resin Standard?

SLA Resin Elastic 50A stretches further before it breaks: 160% elongation at break against 8% for SLA Resin Standard.