Materials / Compare
Aluminum A380 vs. DMLS 17-4PH Stainless Steel
Compare Aluminum A380 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 | 160MPasourcetypical, 25 °C | 861MPasourcemean, as built, horizontal (N=72) |
| Ultimate tensile strength | 320MPasourcetypical, 25 °C | 886MPasourcemean, as built, horizontal (N=72) |
| Elongation at break | 3.5%sourcetypical | 19.9%sourcemean at break, as built, horizontal |
| Young's modulus (stiffness) | 71GPasourcetypical, 25 °C | 197GPasourcebase material: wrought 17-4 PH, Condition H 900 (Cleveland-Cliffs) |
| Density | 2,713kg/m³sourcetypical at 68 °F | 7,790kg/m³sourcemean part density (ISO 3369) |
| Strength to weight | 59kN·m/kg | 110kN·m/kg1.87x higher |
| Stiffness to weight | 26.2MN·m/kg3% higher | 25.3MN·m/kg |
| Poisson's ratio | not sourced | 0.272sourcebase material: wrought 17-4 PH, all conditions (Cleveland-Cliffs) |
| Shear modulus | not sourced | 77.4GPa |
| Bulk modulus | not sourced | 144GPa |
| Speed of sound | 5,116m/s | 5,029m/s |
| Thermal | ||
| Thermal conductivity | 96.2W/m·Ksourcetypical at 68 °F | 17.9W/m·Ksourcebase material: wrought 17-4 PH, Condition H 900, at 149 °C (Cleveland-Cliffs) |
| Thermal expansion | 21.8µm/m·Ksourcetypical, 68-572 °F (20-300 °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 | 109µm growth | 52µm growth2.09x less |
| Specific heat | 963J/kg·Ksourcetypical at 68 °F | 460J/kg·Ksourcebase material: wrought 17-4 PH, Condition A, 0-100 °C (Cleveland-Cliffs) |
| Heats up and cools (diffusivity) | 36.8mm²/s7.37x faster | 5mm²/s |
| Thermal shock resistance | not sourced | 5,474W/m |
| Values for | A380 aluminium high-pressure die-casting alloy, typical properties; Rheocast Company (aluminium die caster, Germantown WI) A380 alloy data page. | 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 Aluminum A380 stronger than DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is stronger: its yield strength is 861 MPa against 160 MPa for Aluminum A380 (5.38x).
Which is lighter, Aluminum A380 or DMLS 17-4PH Stainless Steel?
Aluminum A380 is lighter: 2,713 kg/m³ against 7,790 kg/m³ for DMLS 17-4PH Stainless Steel.
Which is stiffer, Aluminum A380 or DMLS 17-4PH Stainless Steel?
DMLS 17-4PH Stainless Steel is stiffer: Young's modulus 197 GPa against 71 GPa for Aluminum A380, so the same part in DMLS 17-4PH Stainless Steel deflects less under the same load.
Which is lighter for the same job, Aluminum A380 or DMLS 17-4PH Stainless Steel?
For the same stiffness or strength: Aluminum A380 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong panel or plate; DMLS 17-4PH Stainless Steel is lighter for a strong rod or tie, strong beam.
| Part that must be | Aluminum A380 | DMLS 17-4PH Stainless Steel |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 3% heavier |
| Stiff beam (bending) | lighter | 1.72x heavier |
| Stiff panel or plate | lighter | 2.04x heavier |
| Strong rod or tie | 1.87x heavier | lighter |
| Strong beam | 7% heavier | lighter |
| Strong panel or plate | lighter | 24% 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, Aluminum A380 or DMLS 17-4PH Stainless Steel?
Aluminum A380 conducts heat better: 96.2 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 21.8 µm/m·K for Aluminum A380.
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