Materials / Compare
Plastic POM/Acetal vs. SLA Resin Elastic 50A
Compare Plastic POM/Acetal 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 | 69MPasourcetypical (single ASTM D638 tensile strength) | not given (tensile used) |
| Ultimate tensile strength | 69MPasourcetypical20.3x stronger | 3.4MPasourcetypical |
| Compressive strength | 124MPasourcecompressive stress at 10% deformation | not sourced |
| Flexural strength | 99MPasourceflexural yield strength, typical | not sourced |
| Elongation at break | 75%sourcetypical | 160%sourcetypical2.13x more ductile |
| Young's modulus (stiffness) | 2.8GPasourcetypical | not sourced |
| Density | 1,420kg/m³sourcetypical (DuPont product information for Delrin 100 NC010; 'The data listed here fall within the normal range of product properties') | 1,010kg/m³sourcetypical |
| Strength to weight | 48.6kN·m/kg14.4x higher | 3.37kN·m/kg |
| Stiffness to weight | 1.97MN·m/kg | not sourced |
| Poisson's ratio | 0.35sourcetypical | not sourced |
| Shear modulus | 1.04GPa | not sourced |
| Bulk modulus | 3.11GPa | not sourced |
| Speed of sound | 1,404m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 0.4W/m·Ksourcetypical | not sourced |
| Thermal expansion | 122µm/m·Ksourcemean, 29 to 60 °C | not sourced |
| 100 mm part over a 50 °C swing | 610µm growth | not sourced |
| Specific heat | 1,465J/kg·Ksourceaverage -18 to 100 °C, Delrin acetal resins (not grade-specific) | not sourced |
| Heats up and cools (diffusivity) | 0.192mm²/s | not sourced |
| Thermal shock resistance | 52.5W/m | not sourced |
| Melting point | 175°Csourcecrystalline melting point | not sourced |
| Glass transition | not sourced | -34.5°CsourceDMA |
| Max service temperature | 125°CsourceHDT 1.8 MPa (annealed) | not sourced |
| Values for | DuPont Delrin 100 acetal homopolymer, Table 2 'Typical Properties of Delrin Acetal Resins' (ASTM methods), Delrin Design Guide Module III hosted on delrin.com | 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 Plastic POM/Acetal stronger than SLA Resin Elastic 50A?
Plastic POM/Acetal is stronger: its yield strength is 69 MPa against tensile strength 3.4 MPa for SLA Resin Elastic 50A (20.3x).
Which is lighter, Plastic POM/Acetal or SLA Resin Elastic 50A?
SLA Resin Elastic 50A is lighter: 1,010 kg/m³ against 1,420 kg/m³ for Plastic POM/Acetal.
Which is lighter for the same job, Plastic POM/Acetal or SLA Resin Elastic 50A?
For the same stiffness or strength: Plastic POM/Acetal is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Plastic POM/Acetal | SLA Resin Elastic 50A |
|---|---|---|
| Strong rod or tie | lighter | 14.4x heavier |
| Strong beam | lighter | 5.29x heavier |
| Strong panel or plate | lighter | 3.2x 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 POM/Acetal or SLA Resin Elastic 50A?
SLA Resin Elastic 50A stretches further before it breaks: 160% elongation at break against 75% for Plastic POM/Acetal.