Materials / Compare
Stainless 303 vs. DMLS 17-4PH Stainless Steel
Compare Stainless 303 vs. DMLS 17-4PH Stainless Steel strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | 275MPasourceOutokumpu typical (product P = hot rolled plate, transverse) | 861MPasourcemean, as built, horizontal (N=72) |
| Ultimate tensile strength | 585MPasourceOutokumpu typical | 886MPasourcemean, as built, horizontal (N=72) |
| Elongation at break | 35%sourceOutokumpu typical, A5 | 19.9%sourcemean at break, as built, horizontal |
| Young's modulus (stiffness) | 200GPasourceat RT (Table 12) | 197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs) |
| Density | 7,900kg/m³sourceat RT | 7,790kg/m³sourcemean part density (ISO 3369) |
| Strength to weight | 34.8kN·m/kg | 110kN·m/kg3.17x higher |
| Stiffness to weight | 25.3MN·m/kg | 25.3MN·m/kg |
| 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 | 5,032m/s | 5,029m/s |
| Thermal | ||
| Thermal conductivity | 15W/m·Ksourceat RT | 17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs) |
| Thermal expansion | 16µm/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 | 80µm growth | 52µm growth1.54x less |
| Specific heat | 500J/kg·Ksourceat RT | 460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs) |
| Heats up and cools (diffusivity) | 3.8mm²/s | 5mm²/s32% faster |
| Thermal shock resistance | 902W/m | 5,474W/m6.07x more resistant |
| Max service temperature | 871°Csourcecontinuous, scaling limit | not sourced |
| Values for | 1.4305 / UNS S30300, Outokumpu typical values (hot rolled, solution annealed) from 'Steel Grades, Properties and Global Standards'; max service from Carpenter CarTech 303 datasheet | 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 303 stronger than DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against 275 MPa for Stainless 303 (3.13x).
Which is lighter, Stainless 303 or DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is lighter: 7,790 kg/m³ against 7,900 kg/m³ for Stainless 303.
Which is stiffer, Stainless 303 or DMLS 17-4PH Stainless Steel?
Stainless 303 is stiffer: Young's modulus 200 GPa against 197 GPa for DMLS 17-4PH Stainless Steel, so the same part in Stainless 303 deflects less under the same load.
Which is lighter for the same job, Stainless 303 or DMLS 17-4PH Stainless Steel?
For the same stiffness or strength: DMLS 17-4PH Stainless Steel is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Stainless 303 | DMLS 17-4PH Stainless Steel |
|---|---|---|
| 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 | 3.17x heavier | lighter |
| Strong beam | 2.17x heavier | lighter |
| Strong panel or plate | 1.79x 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 303 or DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel conducts heat better: 17.9 W/m·K against 15 W/m·K for Stainless 303.
Which expands less with temperature?
DMLS 17-4PH Stainless Steel expands less: 10.4 µm/m·K against 16 µm/m·K for Stainless 303.
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