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.
1.4305 / UNS S30300, Outokumpu typical values (hot rolled, solution annealed) from 'Steel Grades, Properties and Global Standards'; max service from Carpenter CarTech 303 datasheet
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 Stainless Steel 303?
Stainless Steel 303 is stronger: its yield strength is 275 MPa against tensile strength 92 MPa for FDM PAHT-CF (2.99x).
Which is lighter, FDM PAHT-CF or Stainless Steel 303?
FDM PAHT-CF is lighter: 1,060 kg/m³ against 7,900 kg/m³ for Stainless Steel 303.
Which is stiffer, FDM PAHT-CF or Stainless Steel 303?
Stainless Steel 303 is stiffer: Young's modulus 200 GPa against 3.86 GPa for FDM PAHT-CF, so the same part in Stainless Steel 303 deflects less under the same load.
Which is lighter for the same job, FDM PAHT-CF or Stainless Steel 303?
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; Stainless Steel 303 is lighter for a stiff rod or tie (tension).
Part that must be
FDM PAHT-CF
Stainless Steel 303
Stiff rod or tie (tension)
6.95x heavier
lighter
Stiff beam (bending)
lighter
4% heavier
Stiff panel or plate
lighter
2x heavier
Strong rod or tie
lighter
2.49x heavier
Strong beam
lighter
3.59x heavier
Strong panel or plate
lighter
4.31x 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).