Materials / Compare
DMLS 17-4PH Stainless Steel vs. Steel AISI 1018
Compare DMLS 17-4PH Stainless Steel vs. Steel AISI 1018 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 | 861MPasourcemean, as built, horizontal (N=72) | 372MPasourceproducer-stated, cold drawn |
| Ultimate tensile strength | 886MPasourcemean, as built, horizontal (N=72) | 441MPasourceproducer-stated, cold drawn |
| Elongation at break | 19.9%sourcemean at break, as built, horizontal | 15%sourcein 2 in (50.8 mm) |
| Young's modulus (stiffness) | 197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs) | 200GPasourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Density | 7,790kg/m³sourcemean part density (ISO 3369) | 7,861kg/m³sourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Strength to weight | 110kN·m/kg2.33x higher | 47.3kN·m/kg |
| Stiffness to weight | 25.3MN·m/kg | 25.4MN·m/kg |
| Poisson's ratio | 0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs) | 0.32sourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Shear modulus | 77.4GPa2% stiffer in shear | 75.7GPa |
| Bulk modulus | 144GPa | 185GPa |
| Speed of sound | 5,029m/s | 5,043m/s |
| Thermal | ||
| Thermal conductivity | 17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs) | 51.9W/m·Ksourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Thermal expansion | 10.4µm/m·Ksourcemean 25-100 °C, ASTM E228, AFTER atmospheric heat treatment (as-built value not published) | 12µm/m·Ksourcebase material: unalloyed carbon steel, Ovako family table (S275JR, 'none alloyed structural steels', C <= 0.21%); mean 20-300 °C |
| 100 mm part over a 50 °C swing | 52µm growth15% less | 60µm growth |
| Specific heat | 460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs) | 486J/kg·Ksourcebase material: AISI 1025 plain carbon steel (MIL-HDBK-5J design value; ASTM A108 bar is the cold-finished carbon-steel bar spec that also covers 1018) |
| Heats up and cools (diffusivity) | 5mm²/s | 13.6mm²/s2.72x faster |
| Thermal shock resistance | 5,474W/m | 5,473W/m |
| 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 | AISI 1018 cold drawn bar (Niagara LaSalle, cold-finished bar producer) |
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 DMLS 17-4PH Stainless Steel stronger than Steel AISI 1018?
DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against 372 MPa for Steel AISI 1018 (2.31x).
Which is lighter, DMLS 17-4PH Stainless Steel or Steel AISI 1018?
DMLS 17-4PH Stainless Steel is lighter: 7,790 kg/m³ against 7,861 kg/m³ for Steel AISI 1018.
Which is stiffer, DMLS 17-4PH Stainless Steel or Steel AISI 1018?
Steel AISI 1018 is stiffer: Young's modulus 200 GPa against 197 GPa for DMLS 17-4PH Stainless Steel, so the same part in Steel AISI 1018 deflects less under the same load.
Which is lighter for the same job, DMLS 17-4PH Stainless Steel or Steel AISI 1018?
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 | DMLS 17-4PH Stainless Steel | Steel AISI 1018 |
|---|---|---|
| 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 | lighter | 2.33x heavier |
| Strong beam | lighter | 1.77x heavier |
| Strong panel or plate | lighter | 1.53x heavier |
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, DMLS 17-4PH Stainless Steel or Steel AISI 1018?
Steel AISI 1018 conducts heat better: 51.9 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 12 µm/m·K for Steel AISI 1018.
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