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.
Zamak 3 (ASTM B86 die cast), Nathan Trotter (zinc alloy producer) technical data sheet, 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 Zinc Zamak 3?
Zinc Zamak 3 is stronger: its yield strength is 221 MPa against tensile strength 92 MPa for FDM PAHT-CF (2.4x).
Which is lighter, FDM PAHT-CF or Zinc Zamak 3?
FDM PAHT-CF is lighter: 1,060 kg/m³ against 6,600 kg/m³ for Zinc Zamak 3.
Which is stiffer, FDM PAHT-CF or Zinc Zamak 3?
Zinc Zamak 3 is stiffer: Young's modulus 85.5 GPa against 3.86 GPa for FDM PAHT-CF, so the same part in Zinc Zamak 3 deflects less under the same load.
Which is lighter for the same job, FDM PAHT-CF or Zinc Zamak 3?
For the same stiffness or strength: FDM PAHT-CF is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate; Zinc Zamak 3 is lighter for a stiff rod or tie (tension).
Part that must be
FDM PAHT-CF
Zinc Zamak 3
Stiff rod or tie (tension)
3.56x heavier
lighter
Stiff beam (bending)
lighter
32% heavier
Stiff panel or plate
lighter
2.22x heavier
Strong rod or tie
lighter
2.59x heavier
Strong beam
lighter
3.47x heavier
Strong panel or plate
lighter
4.02x 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).