FDM PAHT-CF vs. DMLS 17-4PH Stainless Steel

Compare FDM PAHT-CF vs. DMLS 17-4PH Stainless Steel strength, stiffness, weight and thermal properties.

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DMLS 17-4PH Stainless Steel3D printed metal (DMLS)

Mechanical
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Yield strength	not given (tensile used)	861MPasourcemean, as built, horizontal (N=72)
Ultimate tensile strength	92MPasourcetypical	886MPasourcemean, as built, horizontal (N=72)
Flexural strength	125MPasourcetypical	not sourced
Elongation at break	8.4%sourcetypical	19.9%sourcemean at break, as built, horizontal
Young's modulus (stiffness)	3.86GPasourcetypical	197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs)
Density	1,060kg/m³sourcetypical	7,790kg/m³sourcemean part density (ISO 3369)
Strength to weight	86.8kN·m/kg	110kN·m/kg27% higher
Stiffness to weight	3.64MN·m/kg	25.3MN·m/kg6.94x higher
Poisson's ratio	not sourced	0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs)
Shear modulus	not sourced	77.4GPa
Bulk modulus	not sourced	144GPa
Speed of sound	1,908m/s	5,029m/s
Thermal
Thermal conductivity	not sourced	17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs)
Thermal expansion	not sourced	10.4µm/m·Ksourcemean 25-100 °C, ASTM E228, AFTER atmospheric heat treatment (as-built value not published)
100 mm part over a 50 °C swing	not sourced	52µm growth
Specific heat	not sourced	460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs)
Heats up and cools (diffusivity)	not sourced	5mm²/s
Thermal shock resistance	not sourced	5,474W/m
Melting point	225°Csourcetypical	not sourced
Glass transition	70°Csourcetypical	not sourced
Max service temperature	170°CsourceHDT 1.8 MPa	not sourced
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.	EOS StainlessSteel 17-4PH IndustryLine (powder 9011-0041), EOS M 290, 40 µm, default job 17-4PH_040_StainlessM291_100, as built, horizontal; ISO 6892 & ASTM E8M

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 and DMLS 17-4PH Stainless Steel are 3D printed: their properties depend on build direction and print settings; these are typical values.

Questions

Is FDM PAHT-CF stronger than DMLS 17-4PH Stainless Steel?

DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against tensile strength 92 MPa for FDM PAHT-CF (9.35x).

Which is lighter, FDM PAHT-CF or DMLS 17-4PH Stainless Steel?

FDM PAHT-CF is lighter: 1,060 kg/m³ against 7,790 kg/m³ for DMLS 17-4PH Stainless Steel.

Which is stiffer, FDM PAHT-CF or DMLS 17-4PH Stainless Steel?

DMLS 17-4PH Stainless Steel is stiffer: Young's modulus 197 GPa against 3.86 GPa for FDM PAHT-CF, so the same part in DMLS 17-4PH Stainless Steel deflects less under the same load.

Which is lighter for the same job, FDM PAHT-CF or DMLS 17-4PH Stainless Steel?

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; DMLS 17-4PH Stainless Steel is lighter for a stiff rod or tie (tension), strong rod or tie.

Part that must be	FDM PAHT-CF	DMLS 17-4PH Stainless Steel
Stiff rod or tie (tension)	6.94x heavier	lighter
Stiff beam (bending)	lighter	3% heavier
Stiff panel or plate	lighter	1.98x heavier
Strong rod or tie	27% heavier	lighter
Strong beam	lighter	1.66x heavier
Strong panel or plate	lighter	2.4x 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 59 materials

Stiffness against density

Strength against density