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.
Isola 370HR FR-4 laminate (Polyclad PCL-FR-370HR, 180 C Tg multifunctional epoxy, E-glass fabric), copper removed; Isola data sheet Revision C, last updated April 15, 2021. Woven-glass laminate: the sheet gives in-plane values per weave direction (length / cross) and the Z-axis CTE separately; the solver is isotropic per material.
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 PCB Laminate FR-4?
PCB Laminate FR-4 is stronger: its tensile strength is 315 MPa against 92 MPa for FDM PAHT-CF (3.43x).
Which is lighter, FDM PAHT-CF or PCB Laminate FR-4?
FDM PAHT-CF is lighter: 1,060 kg/m³ against 1,920 kg/m³ for PCB Laminate FR-4.
Which is stiffer, FDM PAHT-CF or PCB Laminate FR-4?
PCB Laminate FR-4 is stiffer: Young's modulus 23.9 GPa against 3.86 GPa for FDM PAHT-CF, so the same part in PCB Laminate FR-4 deflects less under the same load.
Which is lighter for the same job, FDM PAHT-CF or PCB Laminate FR-4?
For the same stiffness or strength: PCB Laminate FR-4 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
PCB Laminate FR-4
Stiff rod or tie (tension)
3.41x heavier
lighter
Stiff beam (bending)
37% heavier
lighter
Stiff panel or plate
1% heavier
lighter
Strong rod or tie
1.89x heavier
lighter
Strong beam
26% heavier
lighter
Strong panel or plate
2% heavier
lighter
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).