Materials / Compare
DMLS 17-4PH Stainless Steel vs. Plastic PPS GF40
Compare DMLS 17-4PH Stainless Steel vs. Plastic PPS GF40 strength, stiffness, weight and thermal properties.
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|---|---|---|
| Mechanical | ||
| Yield strength | 861MPasourcemean, as built, horizontal (N=72) | not given (tensile used) |
| Ultimate tensile strength | 886MPasourcemean, as built, horizontal (N=72) | 195MPasourcetensile strength, 5 mm/min |
| Flexural strength | not sourced | 285MPasourceflexural strength at break |
| Elongation at break | 19.9%sourcemean at break, as built, horizontal | 1.9%sourcestrain at break, 5 mm/min |
| Young's modulus (stiffness) | 197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs) | 14.7GPasourcetypical, 1 mm/min |
| Density | 7,790kg/m³sourcemean part density (ISO 3369) | 1,650kg/m³sourcetypical |
| Strength to weight | 110kN·m/kg | 118kN·m/kg7% higher |
| Stiffness to weight | 25.3MN·m/kg2.84x higher | 8.91MN·m/kg |
| Poisson's ratio | 0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs) | 0.35sourceglass-reinforced Fortron PPS (class value, not grade-specific) |
| Shear modulus | 77.4GPa14.2x stiffer in shear | 5.44GPa |
| Bulk modulus | 144GPa | 16.3GPa |
| Speed of sound | 5,029m/s | 2,985m/s |
| Thermal | ||
| Thermal conductivity | 17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs) | 0.2W/m·Ksource40% glass-reinforced Fortron, 25 °C (not grade-specific) |
| Thermal expansion | 10.4µm/m·Ksourcemean 25-100 °C, ASTM E228, AFTER atmospheric heat treatment (as-built value not published) | 12µm/m·Ksourceparallel (flow), mean -50 to 90 °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) | not sourced |
| Heats up and cools (diffusivity) | 5mm²/s | not sourced |
| Thermal shock resistance | 5,474W/m38.1x more resistant | 144W/m |
| Melting point | not sourced | 280°CsourceDSC, 10 °C/min |
| Glass transition | not sourced | 90°CsourceDSC, 10 °C/min |
| Max service temperature | not sourced | 270°CsourceHDT 1.8 MPa |
| 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 | Celanese Fortron 1140L4 (PPS, 40% glass fibre), injection moulding; FORTRON PPS Short-Term Properties Guide (PPS-012, 2016); thermal conductivity and Poisson for 40% glass-reinforced Fortron from the Fortron PPS Design Manual (PPS-050, 2013). |
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 Plastic PPS GF40?
DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against tensile strength 195 MPa for Plastic PPS GF40 (4.41x).
Which is lighter, DMLS 17-4PH Stainless Steel or Plastic PPS GF40?
Plastic PPS GF40 is lighter: 1,650 kg/m³ against 7,790 kg/m³ for DMLS 17-4PH Stainless Steel.
Which is stiffer, DMLS 17-4PH Stainless Steel or Plastic PPS GF40?
DMLS 17-4PH Stainless Steel is stiffer: Young's modulus 197 GPa against 14.7 GPa for Plastic PPS GF40, so the same part in DMLS 17-4PH Stainless Steel deflects less under the same load.
Which is lighter for the same job, DMLS 17-4PH Stainless Steel or Plastic PPS GF40?
For the same stiffness or strength: DMLS 17-4PH Stainless Steel is lighter for a stiff rod or tie (tension); Plastic PPS GF40 is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | DMLS 17-4PH Stainless Steel | Plastic PPS GF40 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 2.84x heavier |
| Stiff beam (bending) | 29% heavier | lighter |
| Stiff panel or plate | 1.99x heavier | lighter |
| Strong rod or tie | 7% heavier | lighter |
| Strong beam | 1.75x heavier | lighter |
| Strong panel or plate | 2.25x 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, DMLS 17-4PH Stainless Steel or Plastic PPS GF40?
DMLS 17-4PH Stainless Steel conducts heat better: 17.9 W/m·K against 0.2 W/m·K for Plastic PPS GF40.
Which expands less with temperature?
DMLS 17-4PH Stainless Steel expands less: 10.4 µm/m·K against 12 µm/m·K for Plastic PPS GF40.
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