Materials / Compare
FDM PAHT-CF vs. Plastic PEEK
Compare FDM PAHT-CF vs. Plastic PEEK 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 | not given (tensile used) | 98MPasourcetypical, tensile yield |
| Ultimate tensile strength | 92MPasourcetypical | not sourced |
| Compressive strength | not sourced | 125MPasourcetypical, 23 C |
| Flexural strength | 125MPasourcetypical | 165MPasourcetypical, flexural stress at yield, 23 C |
| Elongation at break | 8.4%sourcetypical | 25%sourcetypical, at break |
| Young's modulus (stiffness) | 3.86GPasourcetypical | 4GPasourcetypical (nominal) |
| Density | 1,060kg/m³sourcetypical | 1,300kg/m³sourcetypical (crystalline) |
| Strength to weight | 86.8kN·m/kg15% higher | 75.4kN·m/kg |
| Stiffness to weight | 3.64MN·m/kg18% higher | 3.08MN·m/kg |
| Poisson's ratio | not sourced | 0.38sourcetypical |
| Shear modulus | not sourced | 1.45GPa |
| Bulk modulus | not sourced | 5.56GPa |
| Speed of sound | 1,908m/s | 1,754m/s |
| Thermal | ||
| Thermal conductivity | not sourced | 0.29W/m·Ksourcetypical, average, 23 C |
| Thermal expansion | not sourced | 55µm/m·Ksourceaverage of flow/cross-flow, below Tg (<143 C) |
| 100 mm part over a 50 °C swing | not sourced | 275µm growth |
| Specific heat | not sourced | 2,200J/kg·Ksourcetypical, 23 °C, DSC (Victrex PEEK 450G TDS, revision Jul 2012) |
| Heats up and cools (diffusivity) | not sourced | 0.101mm²/s |
| Thermal shock resistance | not sourced | 80.1W/m |
| Melting point | 225°Csourcetypical | 343°Csourcetypical, DSC |
| Glass transition | 70°Csourcetypical | 143°Csourceonset (midpoint 150 C) |
| Max service temperature | 170°CsourceHDT 1.8 MPa | 240°CsourceUL 746B RTI, mechanical strength (continuous use index) |
| Values for | Bambu Lab PAHT-CF, TDS V3.0, printed specimens X-Y, dry state; nozzle 290 °C, bed 100 °C, 100 mm/s, 100% infill; annealed and dried 80 °C for 12 h before testing. | Victrex PEEK 450G (unreinforced, injection moulded), Victrex TDS rev. March 2026; Poisson from Victrex fluid-management flyer (2020-07) |
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.
FDM PAHT-CF is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is FDM PAHT-CF stronger than Plastic PEEK?
Plastic PEEK is stronger: its yield strength is 98 MPa against tensile strength 92 MPa for FDM PAHT-CF (7%).
Which is lighter, FDM PAHT-CF or Plastic PEEK?
FDM PAHT-CF is lighter: 1,060 kg/m³ against 1,300 kg/m³ for Plastic PEEK.
Which is stiffer, FDM PAHT-CF or Plastic PEEK?
Plastic PEEK is stiffer: Young's modulus 4 GPa against 3.86 GPa for FDM PAHT-CF, so the same part in Plastic PEEK deflects less under the same load.
Which is lighter for the same job, FDM PAHT-CF or Plastic PEEK?
For the same stiffness or strength: FDM PAHT-CF 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 | FDM PAHT-CF | Plastic PEEK |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 18% heavier |
| Stiff beam (bending) | lighter | 20% heavier |
| Stiff panel or plate | lighter | 21% heavier |
| Strong rod or tie | lighter | 15% heavier |
| Strong beam | lighter | 18% heavier |
| Strong panel or plate | lighter | 19% 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).