FDM PAHT-CF vs. Stainless Steel 304

Compare FDM PAHT-CF vs. Stainless Steel 304 strength, stiffness, weight and thermal properties.

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Mechanical
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Yield strength	not given (tensile used)	241MPasourcetypical, annealed, 70 °F (21 °C)
Ultimate tensile strength	92MPasourcetypical	586MPasourcetypical, annealed, 70 °F (21 °C)
Flexural strength	125MPasourcetypical	not sourced
Elongation at break	8.4%sourcetypical	55%sourcetypical, annealed, in 2 in. (50.8 mm)
Young's modulus (stiffness)	3.86GPasourcetypical	193GPasourcetypical, in tension
Density	1,060kg/m³sourcetypical7.58x lighter	8,030kg/m³sourcetypical
Strength to weight	86.8kN·m/kg2.89x higher	30kN·m/kg
Stiffness to weight	3.64MN·m/kg	24MN·m/kg6.6x higher
Poisson's ratio	not sourced	0.3sourcedesign value (structural stainless steels)
Shear modulus	not sourced	74.2GPa
Bulk modulus	not sourced	161GPa
Speed of sound	1,908m/s	4,903m/s
Thermal
Thermal conductivity	not sourced	16.2W/m·Ksourceat 100 °C
Thermal expansion	not sourced	16.9µm/m·Ksourcemean, 0–100 °C
100 mm part over a 50 °C swing	not sourced	84.5µm growth
Specific heat	not sourced	500J/kg·Ksourcemean, 0–100 °C
Heats up and cools (diffusivity)	not sourced	4.03mm²/s
Thermal shock resistance	not sourced	838W/m
Melting point	225°Csourcetypical	1,399–1,454°Csourcemelting range
Glass transition	70°Csourcetypical	not sourced
Max service temperature	170°CsourceHDT 1.8 MPa	899°Csourcecontinuous, oxidation (scaling) limit in air
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.	Type 304, annealed flat-rolled (Cleveland-Cliffs 304/304L Product Data Bulletin, May 2021); Poisson's ratio from the Nickel Institute/SCI structural stainless design manual

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 304?

Stainless Steel 304 is stronger: its yield strength is 241 MPa against tensile strength 92 MPa for FDM PAHT-CF (2.62x).

Which is lighter, FDM PAHT-CF or Stainless Steel 304?

FDM PAHT-CF is lighter: 1,060 kg/m³ against 8,030 kg/m³ for Stainless Steel 304.

Which is stiffer, FDM PAHT-CF or Stainless Steel 304?

Stainless Steel 304 is stiffer: Young's modulus 193 GPa against 3.86 GPa for FDM PAHT-CF, so the same part in Stainless Steel 304 deflects less under the same load.

Which is lighter for the same job, FDM PAHT-CF or Stainless Steel 304?

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 304 is lighter for a stiff rod or tie (tension).

Part that must be	FDM PAHT-CF	Stainless Steel 304
Stiff rod or tie (tension)	6.6x heavier	lighter
Stiff beam (bending)	lighter	7% heavier
Stiff panel or plate	lighter	2.06x heavier
Strong rod or tie	lighter	2.89x heavier
Strong beam	lighter	3.99x heavier
Strong panel or plate	lighter	4.68x 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).

Among 72 materials

Stiffness against density

Strength against density