Materials / Compare
FDM PAHT-CF vs. Nickel Inconel 718
Compare FDM PAHT-CF vs. Nickel Inconel 718 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) | 1,207MPasourcetypical, 1.0 in. hot-rolled bar, 0.2% offset |
| Ultimate tensile strength | 92MPasourcetypical | 1,389MPasourcetypical, 1.0 in. bar |
| Flexural strength | 125MPasourcetypical | not sourced |
| Elongation at break | 8.4%sourcetypical | 20%sourcetypical, 1.0 in. bar |
| Young's modulus (stiffness) | 3.86GPasourcetypical | 200GPasourcetypical, 21 °C, annealed + aged |
| Density | 1,060kg/m³sourcetypical | 8,221kg/m³sourcenominal, annealed and aged |
| Strength to weight | 86.8kN·m/kg | 147kN·m/kg1.69x higher |
| Stiffness to weight | 3.64MN·m/kg | 24.3MN·m/kg6.68x higher |
| Poisson's ratio | not sourced | 0.294sourcetypical, 21 °C, annealed + aged |
| Shear modulus | not sourced | 77.3GPa |
| Bulk modulus | not sourced | 162GPa |
| Speed of sound | 1,908m/s | 4,932m/s |
| Thermal | ||
| Thermal conductivity | not sourced | 11.4W/m·Ksourcetypical, 21 °C, annealed + aged (calculated from resistivity per footnote a) |
| Thermal expansion | not sourced | 13.2µm/m·Ksourcetypical, mean 21-93 °C, annealed + aged |
| 100 mm part over a 50 °C swing | not sourced | 66µm growth |
| Specific heat | not sourced | 435J/kg·Ksourcetypical, 21 °C |
| Heats up and cools (diffusivity) | not sourced | 3.19mm²/s |
| Thermal shock resistance | not sourced | 3,680W/m |
| Melting point | 225°Csourcetypical | 1,260–1,336°Csourcemelting range |
| Glass transition | 70°Csourcetypical | not sourced |
| Max service temperature | 170°CsourceHDT 1.8 MPa | 704°Csourceupper use temperature stated by producer |
| 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. | INCONEL alloy 718, standard grade, 1750 °F/1 hr anneal + 1325 °F/8 hr F.C. to 1150 °F aged; Special Metals bulletin SMC-045 typical values |
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 Nickel Inconel 718?
Nickel Inconel 718 is stronger: its yield strength is 1,207 MPa against tensile strength 92 MPa for FDM PAHT-CF (13.1x).
Which is lighter, FDM PAHT-CF or Nickel Inconel 718?
FDM PAHT-CF is lighter: 1,060 kg/m³ against 8,221 kg/m³ for Nickel Inconel 718.
Which is stiffer, FDM PAHT-CF or Nickel Inconel 718?
Nickel Inconel 718 is stiffer: Young's modulus 200 GPa against 3.86 GPa for FDM PAHT-CF, so the same part in Nickel Inconel 718 deflects less under the same load.
Which is lighter for the same job, FDM PAHT-CF or Nickel Inconel 718?
For the same stiffness or strength: FDM PAHT-CF is lighter for a stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate; Nickel Inconel 718 is lighter for a stiff rod or tie (tension), strong rod or tie.
| Part that must be | FDM PAHT-CF | Nickel Inconel 718 |
|---|---|---|
| Stiff rod or tie (tension) | 6.68x heavier | lighter |
| Stiff beam (bending) | lighter | 8% heavier |
| Stiff panel or plate | lighter | 2.08x heavier |
| Strong rod or tie | 1.69x heavier | lighter |
| Strong beam | lighter | 39% heavier |
| Strong panel or plate | lighter | 2.14x 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).