Materials / Compare
DMLS AlSi10Mg Aluminum vs. Stainless 17-4PH
Compare DMLS AlSi10Mg Aluminum vs. Stainless 17-4PH 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 | 270MPasourcetypical, as manufactured, horizontal | 1,275MPasourcetypical, transverse, sheet/strip |
| Ultimate tensile strength | 450MPasourcetypical, as manufactured, horizontal | 1,379MPasourcetypical, transverse, sheet/strip |
| Elongation at break | 10.2%sourcetypical at break, as manufactured, horizontal | 9%sourcetypical, transverse, in 2 in. (50.8 mm) |
| Young's modulus (stiffness) | 72GPasourcesame material and process, different machine maker: Renishaw RenAM 500, 30 µm, as built, horizontal (XY) | 197GPasourceH 900 |
| Density | 2,670kg/m³sourcetypical part density (ISO 3369), EOS M 290, AlSi10Mg_030_FlexM291 (30 µm) | 7,800kg/m³sourceH 900 |
| Strength to weight | 101kN·m/kg | 163kN·m/kg1.62x higher |
| Stiffness to weight | 27MN·m/kg7% higher | 25.3MN·m/kg |
| Poisson's ratio | 0.33sourcebase material: cast Al-Si-Mg alloy 359.0 (Al-9Si-0.6Mg, closest MIL-HDBK-5J alloy to AlSi10Mg / EN AC-43000) | 0.272sourceH 900 (column) |
| Shear modulus | 27.1GPa | 77.4GPa2.86x stiffer in shear |
| Bulk modulus | 70.6GPa | 144GPa |
| Speed of sound | 5,193m/s | 5,026m/s |
| Thermal | ||
| Thermal conductivity | 110W/m·Ksourcetypical, as manufactured, horizontal (ISO 22007-2) | 17.9W/m·Ksourceat 149 °C (300 °F), H 900 |
| Thermal expansion | 20µm/m·Ksourcemean 25-100 °C, ASTM E228 | 10.8µm/m·Ksourcemean, 21–93 °C (70–200 °F), H 900 |
| 100 mm part over a 50 °C swing | 100µm growth | 54µm growth1.85x less |
| Specific heat | 963J/kg·Ksourcebase material: cast Al-Si-Mg alloy 359.0 (MIL-HDBK-5J), at 100 °C | 460J/kg·Ksourcemean, 0–100 °C, H 900 |
| Heats up and cools (diffusivity) | 42.8mm²/s8.58x faster | 4.99mm²/s |
| Thermal shock resistance | 13,819W/m1.77x more resistant | 7,809W/m |
| Max service temperature | not sourced | 316°Csourcestrength-retention limit (not oxidation) |
| Values for | EOS Aluminium AlSi10Mg (powder 9011-0024), EOS M 290 | 30 µm process (AlSi10Mg_FlexM291 2.01), as manufactured, horizontal; machined (turned) specimens, ISO 6892-1 B10 | Cleveland-Cliffs 17-4 PH, Condition H 900, sheet/strip, transverse (Product Data Bulletin, May 2021) |
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 AlSi10Mg Aluminum is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is DMLS AlSi10Mg Aluminum stronger than Stainless 17-4PH?
Stainless 17-4PH is stronger: its yield strength is 1,275 MPa against 270 MPa for DMLS AlSi10Mg Aluminum (4.72x).
Which is lighter, DMLS AlSi10Mg Aluminum or Stainless 17-4PH?
DMLS AlSi10Mg Aluminum is lighter: 2,670 kg/m³ against 7,800 kg/m³ for Stainless 17-4PH.
Which is stiffer, DMLS AlSi10Mg Aluminum or Stainless 17-4PH?
Stainless 17-4PH is stiffer: Young's modulus 197 GPa against 72 GPa for DMLS AlSi10Mg Aluminum, so the same part in Stainless 17-4PH deflects less under the same load.
Which is lighter for the same job, DMLS AlSi10Mg Aluminum or Stainless 17-4PH?
For the same stiffness or strength: DMLS AlSi10Mg Aluminum is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate; Stainless 17-4PH is lighter for a strong rod or tie.
| Part that must be | DMLS AlSi10Mg Aluminum | Stainless 17-4PH |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 7% heavier |
| Stiff beam (bending) | lighter | 1.77x heavier |
| Stiff panel or plate | lighter | 2.09x heavier |
| Strong rod or tie | 1.62x heavier | lighter |
| Strong beam | lighter | 4% heavier |
| Strong panel or plate | lighter | 34% 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 AlSi10Mg Aluminum or Stainless 17-4PH?
DMLS AlSi10Mg Aluminum conducts heat better: 110 W/m·K against 17.9 W/m·K for Stainless 17-4PH.
Which expands less with temperature?
Stainless 17-4PH expands less: 10.8 µm/m·K against 20 µm/m·K for DMLS AlSi10Mg Aluminum.
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