Materials / Compare
Stainless 304 vs. DMLS 17-4PH Stainless Steel
Compare Stainless 304 vs. DMLS 17-4PH Stainless Steel strength, stiffness, weight and thermal properties.
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|---|---|---|
| Mechanical | ||
| Yield strength | 241MPasourcetypical, annealed, 70 °F (21 °C) | 861MPasourcemean, as built, horizontal (N=72) |
| Ultimate tensile strength | 586MPasourcetypical, annealed, 70 °F (21 °C) | 886MPasourcemean, as built, horizontal (N=72) |
| Elongation at break | 55%sourcetypical, annealed, in 2 in. (50.8 mm) | 19.9%sourcemean at break, as built, horizontal |
| Young's modulus (stiffness) | 193GPasourcetypical, in tension | 197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs) |
| Density | 8,030kg/m³sourcetypical | 7,790kg/m³sourcemean part density (ISO 3369) |
| Strength to weight | 30kN·m/kg | 110kN·m/kg3.68x higher |
| Stiffness to weight | 24MN·m/kg | 25.3MN·m/kg5% higher |
| Poisson's ratio | 0.3sourcedesign value (structural stainless steels) | 0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs) |
| Shear modulus | 74.2GPa | 77.4GPa4% stiffer in shear |
| Bulk modulus | 161GPa | 144GPa |
| Speed of sound | 4,903m/s | 5,029m/s |
| Thermal | ||
| Thermal conductivity | 16.2W/m·Ksourceat 100 °C | 17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs) |
| Thermal expansion | 16.9µm/m·Ksourcemean, 0–100 °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 | 84.5µm growth | 52µm growth1.63x less |
| Specific heat | 500J/kg·Ksourcemean, 0–100 °C | 460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs) |
| Heats up and cools (diffusivity) | 4.03mm²/s | 5mm²/s24% faster |
| Thermal shock resistance | 838W/m | 5,474W/m6.53x more resistant |
| Melting point | 1,399–1,454°Csourcemelting range | not sourced |
| Max service temperature | 899°Csourcecontinuous, oxidation (scaling) limit in air | not sourced |
| Values for | 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 | 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 304 stronger than DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against 241 MPa for Stainless 304 (3.57x).
Which is lighter, Stainless 304 or DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is lighter: 7,790 kg/m³ against 8,030 kg/m³ for Stainless 304.
Which is stiffer, Stainless 304 or DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is stiffer: Young's modulus 197 GPa against 193 GPa for Stainless 304, so the same part in DMLS 17-4PH Stainless Steel deflects less under the same load.
Which is lighter for the same job, Stainless 304 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 304 | DMLS 17-4PH Stainless Steel |
|---|---|---|
| Stiff rod or tie (tension) | 5% heavier | lighter |
| Stiff beam (bending) | 4% heavier | lighter |
| Stiff panel or plate | 4% heavier | lighter |
| Strong rod or tie | 3.68x heavier | lighter |
| Strong beam | 2.41x heavier | lighter |
| Strong panel or plate | 1.95x 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 304 or DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel conducts heat better: 17.9 W/m·K against 16.2 W/m·K for Stainless 304.
Which expands less with temperature?
DMLS 17-4PH Stainless Steel expands less: 10.4 µm/m·K against 16.9 µm/m·K for Stainless 304.
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