Materials / Compare
FDM PAHT-CF vs. Glass
Compare FDM PAHT-CF vs. Glass strength, stiffness, weight and thermal properties.
| Try it on a partA sample part to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | not given (tensile used) | not given (tensile used) |
| Ultimate tensile strength | 92MPasourcetypical | 41MPasourcetypical mean surface tensile stress at fracture (MOR), 60 s load, weathered, 50% breakage probability |
| Flexural strength | 125MPasourcetypical | 41MPasourcemean MOR (same value as tensile) |
| Elongation at break | 8.4%sourcetypical | not sourced |
| Young's modulus (stiffness) | 3.86GPasourcetypical | 72GPasourcetypical18.7x stiffer |
| Density | 1,060kg/m³sourcetypical2.36x lighter | 2,500kg/m³sourcetypical |
| Strength to weight | 86.8kN·m/kg5.29x higher | 16.4kN·m/kg |
| Stiffness to weight | 3.64MN·m/kg | 28.8MN·m/kg7.91x higher |
| Poisson's ratio | not sourced | 0.22sourcetypical |
| Shear modulus | not sourced | 29.5GPa |
| Bulk modulus | not sourced | 42.9GPa |
| Speed of sound | 1,908m/s | 5,367m/s |
| Thermal | ||
| Thermal conductivity | not sourced | 0.937W/m·Ksourcetypical at 75 F |
| Thermal expansion | not sourced | 8.3µm/m·Ksourcetypical, 75-575 F |
| 100 mm part over a 50 °C swing | not sourced | 41.5µm growth |
| Specific heat | not sourced | 880J/kg·Ksourcetypical at 75 F |
| Heats up and cools (diffusivity) | not sourced | 0.426mm²/s |
| Thermal shock resistance | not sourced | 50.1W/m |
| Melting point | 225°Csourcetypical | not sourced |
| Glass transition | 70°Csourcetypical | not sourced |
| Max service temperature | 170°CsourceHDT 1.8 MPa | 511°Csourcestrain point (ASTM C336) - stress-relaxation onset, not a rated service limit |
| 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. | Annealed soda-lime-silica float glass, Pilkington North America Technical Bulletin ATS-129 (04/2025) |
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 Glass?
FDM PAHT-CF is stronger: its tensile strength is 92 MPa against 41 MPa for Glass (2.24x).
Which is lighter, FDM PAHT-CF or Glass?
FDM PAHT-CF is lighter: 1,060 kg/m³ against 2,500 kg/m³ for Glass.
Which is stiffer, FDM PAHT-CF or Glass?
Glass is stiffer: Young's modulus 72 GPa against 3.86 GPa for FDM PAHT-CF, so the same part in Glass deflects less under the same load.
Which is lighter for the same job, FDM PAHT-CF or Glass?
For the same stiffness or strength: FDM PAHT-CF is lighter for a strong rod or tie, strong beam, strong panel or plate; Glass is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate.
| Part that must be | FDM PAHT-CF | Glass |
|---|---|---|
| Stiff rod or tie (tension) | 7.91x heavier | lighter |
| Stiff beam (bending) | 1.83x heavier | lighter |
| Stiff panel or plate | 12% heavier | lighter |
| Strong rod or tie | lighter | 5.29x heavier |
| Strong beam | lighter | 4.04x heavier |
| Strong panel or plate | lighter | 3.53x 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).