Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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Sources4 documents: EOS GmbH, Carpenter Technology, Cleveland-Cliffs, U.S. Department of Defense
DMLS 17-4PH Stainless Steel
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
EOS StainlessSteel 17-4PH IndustryLine Material Data Sheet, M 290EOS GmbHarchived copyDMLS 17-4PH Stainless Steel · Yield strength: mean, as built, horizontal (N=72)DMLS 17-4PH Stainless Steel · Ultimate tensile strength: mean, as built, horizontal (N=72)DMLS 17-4PH Stainless Steel · Elongation at break: mean at break, as built, horizontalDMLS 17-4PH Stainless Steel · Density: mean part density (ISO 3369)DMLS 17-4PH Stainless Steel · Thermal expansion: mean 25-100 °C, ASTM E228, AFTER atmospheric heat treatment (as-built value not published)
17-4 PH Stainless Steel Product Data Bulletin (2021)Cleveland-CliffsDMLS 17-4PH Stainless Steel · Young's modulus (stiffness): base material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs)DMLS 17-4PH Stainless Steel · Poisson's ratio: base material: wrought 17-4 PH, all conditions (Cleveland-Cliffs)DMLS 17-4PH Stainless Steel · Thermal conductivity: base material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs)DMLS 17-4PH Stainless Steel · Specific heat: base material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs)
4
MIL-HDBK-5J, Metallic Materials and Elements for Aerospace Vehicle Structures (2003)U.S. Department of DefenseSteel AISI 4340 · Young's modulus (stiffness): MIL-HDBK-5J design value (AISI 4340, quenched and tempered)Steel AISI 4340 · Poisson's ratio: MIL-HDBK-5J design value (AISI 4340, quenched and tempered)
Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "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 is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Mechanical
Is DMLS 17-4PH Stainless Steel stronger than Steel AISI 4340?
Steel AISI 4340 is stronger: its yield strength is 1,035 MPa against 861 MPa for DMLS 17-4PH Stainless Steel (20%).
Which is lighter, DMLS 17-4PH Stainless Steel or Steel AISI 4340?
DMLS 17-4PH Stainless Steel is lighter: 7,790 kg/m³ against 7,840 kg/m³ for Steel AISI 4340.
Which is stiffer, DMLS 17-4PH Stainless Steel or Steel AISI 4340?
Steel AISI 4340 is stiffer: Young's modulus 200 GPa against 197 GPa for DMLS 17-4PH Stainless Steel, so the same part in Steel AISI 4340 deflects less under the same load.
Which is lighter for the same job, DMLS 17-4PH Stainless Steel or Steel AISI 4340?
For the same stiffness or strength: Steel AISI 4340 is lighter for a strong rod or tie, strong beam, strong panel or plate.
Part that must be
DMLS 17-4PH Stainless Steel
Steel AISI 4340
Stiff rod or tie (tension)
about equal
about equal
Stiff beam (bending)
about equal
about equal
Stiff panel or plate
about equal
about equal
Strong rod or tie
19% heavier
lighter
Strong beam
12% heavier
lighter
Strong panel or plate
9% 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).
Thermal
Which conducts heat better, DMLS 17-4PH Stainless Steel or Steel AISI 4340?
Steel AISI 4340 conducts heat better: 37.5 W/m·K against 17.9 W/m·K for DMLS 17-4PH Stainless Steel.
Which expands less with temperature?
DMLS 17-4PH Stainless Steel expands less: 10.4 µm/m·K against 11.3 µm/m·K for Steel AISI 4340.