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

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

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.

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

Questions

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

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

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

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

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

For the same stiffness or strength: DMLS 17-4PH Stainless Steel is lighter for a stiff rod or tie (tension), strong rod or tie; FDM PAHT-CF is lighter for a stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate.

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

Among 59 materials

Stiffness against density

Strength against density