Materials / Compare
Stainless 316 vs. DMLS 17-4PH Stainless Steel
Compare Stainless 316 vs. DMLS 17-4PH Stainless Steel strength, stiffness, weight and thermal properties.
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|---|---|---|
| Mechanical | ||
| Yield strength | 265MPasourcetypical (representative), annealed 1.0 mm sheet | 861MPasourcemean, as built, horizontal (N=72) |
| Ultimate tensile strength | 583MPasourcetypical (representative), annealed 1.0 mm sheet | 886MPasourcemean, as built, horizontal (N=72) |
| Elongation at break | 61%sourcetypical (representative), annealed, in 2 in. (51 mm) | 19.9%sourcemean at break, as built, horizontal |
| Young's modulus (stiffness) | 200GPasourcetypical, in tension | 197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs) |
| Density | 8,027kg/m³sourcetypical | 7,790kg/m³sourcemean part density (ISO 3369) |
| Strength to weight | 33kN·m/kg | 110kN·m/kg3.35x higher |
| Stiffness to weight | 24.9MN·m/kg | 25.3MN·m/kg1% higher |
| Poisson's ratio | 0.3sourcedesign value (structural stainless steels) | 0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs) |
| Shear modulus | 76.9GPa | 77.4GPa |
| Bulk modulus | 167GPa | 144GPa |
| Speed of sound | 4,992m/s | 5,029m/s |
| Thermal | ||
| Thermal conductivity | 14.6W/m·Ksource20–100 °C | 17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs) |
| Thermal expansion | 16.5µm/m·Ksourcemean, 20–100 °C | 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 | 82.5µm growth | 52µm growth1.59x less |
| Specific heat | 450J/kg·Ksourceat 20 °C | 460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs) |
| Heats up and cools (diffusivity) | 4.04mm²/s | 5mm²/s24% faster |
| Thermal shock resistance | 821W/m | 5,474W/m6.67x more resistant |
| Melting point | 1,390–1,440°Csourcemelting range | not sourced |
| Max service temperature | 871–899°Csourceoxidation (scaling) limit in air | not sourced |
| Values for | ATI 316 (UNS S31600), annealed 1.0 mm sheet, ATI technical data sheet (2012); Poisson's ratio from the Nickel Institute/SCI structural stainless design manual | 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.
DMLS 17-4PH Stainless Steel is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Stainless 316 stronger than DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against 265 MPa for Stainless 316 (3.25x).
Which is lighter, Stainless 316 or DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is lighter: 7,790 kg/m³ against 8,027 kg/m³ for Stainless 316.
Which is stiffer, Stainless 316 or DMLS 17-4PH Stainless Steel?
Stainless 316 is stiffer: Young's modulus 200 GPa against 197 GPa for DMLS 17-4PH Stainless Steel, so the same part in Stainless 316 deflects less under the same load.
Which is lighter for the same job, Stainless 316 or DMLS 17-4PH Stainless Steel?
For the same stiffness or strength: DMLS 17-4PH Stainless Steel is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Stainless 316 | DMLS 17-4PH Stainless Steel |
|---|---|---|
| Stiff rod or tie (tension) | 1% heavier | lighter |
| Stiff beam (bending) | 2% heavier | lighter |
| Stiff panel or plate | 3% heavier | lighter |
| Strong rod or tie | 3.35x heavier | lighter |
| Strong beam | 2.26x heavier | lighter |
| Strong panel or plate | 1.86x 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).
Which conducts heat better, Stainless 316 or DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel conducts heat better: 17.9 W/m·K against 14.6 W/m·K for Stainless 316.
Which expands less with temperature?
DMLS 17-4PH Stainless Steel expands less: 10.4 µm/m·K against 16.5 µm/m·K for Stainless 316.
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