Materials / Compare
Plastic PEEK vs. SLA Resin Tough 2000
Compare Plastic PEEK vs. SLA Resin Tough 2000 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 | 98MPasourcetypical, tensile yield | 40.4MPasourcetypical |
| Ultimate tensile strength | not sourced | 40.4MPasourcetypical |
| Compressive strength | 125MPasourcetypical, 23 C | not sourced |
| Flexural strength | 165MPasourcetypical, flexural stress at yield, 23 C | 67MPasourcetypical |
| Elongation at break | 25%sourcetypical, at break | 79%sourcetypical |
| Young's modulus (stiffness) | 4GPasourcetypical (nominal) | 1.8GPasourcetypical |
| Density | 1,300kg/m³sourcetypical (crystalline) | 1,090kg/m³sourcetypical |
| Strength to weight | 75.4kN·m/kg2.03x higher | 37.1kN·m/kg |
| Stiffness to weight | 3.08MN·m/kg1.86x higher | 1.65MN·m/kg |
| Poisson's ratio | 0.38sourcetypical | not sourced |
| Shear modulus | 1.45GPa | not sourced |
| Bulk modulus | 5.56GPa | not sourced |
| Speed of sound | 1,754m/s | 1,285m/s |
| Thermal | ||
| Thermal conductivity | 0.29W/m·Ksourcetypical, average, 23 C | not sourced |
| Thermal expansion | 55µm/m·Ksourceaverage of flow/cross-flow, below Tg (<143 C) | 134µm/m·Ksourcemean 0-150 °C |
| 100 mm part over a 50 °C swing | 275µm growth2.44x less | 671µm growth |
| Specific heat | 2,200J/kg·Ksourcetypical, 23 °C, DSC (Victrex PEEK 450G TDS, revision Jul 2012) | not sourced |
| Heats up and cools (diffusivity) | 0.101mm²/s | not sourced |
| Thermal shock resistance | 80.1W/m | not sourced |
| Melting point | 343°Csourcetypical, DSC | not sourced |
| Glass transition | 143°Csourceonset (midpoint 150 C) | 112°CsourceDMA |
| Max service temperature | 240°CsourceUL 746B RTI, mechanical strength (continuous use index) | 57°CsourceHDT 1.8 MPa |
| Values for | Victrex PEEK 450G (unreinforced, injection moulded), Victrex TDS rev. March 2026; Poisson from Victrex fluid-management flyer (2020-07) | Formlabs Tough 2000 Resin V2 (FLTO2002), TDS Rev. 01 10/06/2025; printed on Form 4 at 100 µm, washed in Form Wash V2 10+5 min in >=99% IPA, post-cured 70 °C for 12 min in Form Cure V2. Orientation not stated. |
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 Tough 2000 is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Plastic PEEK stronger than SLA Resin Tough 2000?
Plastic PEEK is stronger: its yield strength is 98 MPa against 40.4 MPa for SLA Resin Tough 2000 (2.43x).
Which is lighter, Plastic PEEK or SLA Resin Tough 2000?
SLA Resin Tough 2000 is lighter: 1,090 kg/m³ against 1,300 kg/m³ for Plastic PEEK.
Which is stiffer, Plastic PEEK or SLA Resin Tough 2000?
Plastic PEEK is stiffer: Young's modulus 4 GPa against 1.8 GPa for SLA Resin Tough 2000, so the same part in Plastic PEEK deflects less under the same load.
Which is lighter for the same job, Plastic PEEK or SLA Resin Tough 2000?
For the same stiffness or strength: Plastic PEEK is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Plastic PEEK | SLA Resin Tough 2000 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 1.86x heavier |
| Stiff beam (bending) | lighter | 25% heavier |
| Stiff panel or plate | lighter | 9% heavier |
| Strong rod or tie | lighter | 2.03x heavier |
| Strong beam | lighter | 1.51x heavier |
| Strong panel or plate | lighter | 31% 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 expands less with temperature?
Plastic PEEK expands less: 55 µm/m·K against 134 µm/m·K for SLA Resin Tough 2000.