Materials / Compare
Plastic PETG vs. SLA Resin Elastic 50A
Compare Plastic PETG vs. SLA Resin Elastic 50A strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | 46.2MPasourcetypical | not given (tensile used) |
| Ultimate tensile strength | 46.2MPasourcetypical, peak stress (= stress at yield) | 3.4MPasourcetypical |
| Flexural strength | 78.9MPasourcetypical | not sourced |
| Elongation at break | 7.6%sourcetypical | 160%sourcetypical21.1x more ductile |
| Young's modulus (stiffness) | 1.94GPasourcetypical | not sourced |
| Density | 1,270kg/m³sourcetypical | 1,010kg/m³sourcetypical26% lighter |
| Strength to weight | 36.4kN·m/kg10.8x higher | 3.37kN·m/kg |
| Stiffness to weight | 1.53MN·m/kg | not sourced |
| Poisson's ratio | not sourced | not sourced |
| Shear modulus | not sourced | not sourced |
| Bulk modulus | not sourced | not sourced |
| Speed of sound | 1,236m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 0.21W/m·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), typical | not sourced |
| Thermal expansion | 51µm/m·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), typical | not sourced |
| 100 mm part over a 50 °C swing | 255µm growth | not sourced |
| Specific heat | 1,300J/kg·Ksourcebase material: Eastman Eastar Copolyester 6763 (PETG), DSC at 60 °C (lowest temperature listed) | not sourced |
| Heats up and cools (diffusivity) | 0.127mm²/s | not sourced |
| Thermal shock resistance | not sourced | not sourced |
| Glass transition | 77.4°Csourcetypical | -34.5°CsourceDMA |
| Max service temperature | 76.2°CsourceHDT 0.455 MPa (printed specimens) | not sourced |
| Values for | Ultimaker PETG, 3D-printed specimens, XY (flat); Ultimaker S5 Pro, engineering intent profile, 0.15 mm layer height, AA 0.4 print core, 100% infill, Cura 4.9, printed one-at-a-time, conditioned >=24 h at room temperature. TDS v1.00, April 29, 2022. | 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.
Plastic PETG and SLA Resin Elastic 50A are 3D printed: their properties depend on build direction and print settings; these are typical values.
Questions
Is Plastic PETG stronger than SLA Resin Elastic 50A?
Plastic PETG is stronger: its yield strength is 46.2 MPa against tensile strength 3.4 MPa for SLA Resin Elastic 50A (13.6x).
Which is lighter, Plastic PETG or SLA Resin Elastic 50A?
SLA Resin Elastic 50A is lighter: 1,010 kg/m³ against 1,270 kg/m³ for Plastic PETG.
Which is lighter for the same job, Plastic PETG or SLA Resin Elastic 50A?
For the same stiffness or strength: Plastic PETG is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Plastic PETG | SLA Resin Elastic 50A |
|---|---|---|
| Strong rod or tie | lighter | 10.8x heavier |
| Strong beam | lighter | 4.53x heavier |
| Strong panel or plate | lighter | 2.93x 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, Plastic PETG or SLA Resin Elastic 50A?
SLA Resin Elastic 50A stretches further before it breaks: 160% elongation at break against 7.6% for Plastic PETG.