Materials / Compare
DMLS AlSi10Mg Aluminum vs. Stainless 303
Compare DMLS AlSi10Mg Aluminum vs. Stainless 303 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 | 275MPasourceOutokumpu typical (product P = hot rolled plate, transverse) |
| Ultimate tensile strength | 450MPasourcetypical, as manufactured, horizontal | 585MPasourceOutokumpu typical |
| Elongation at break | 10.2%sourcetypical at break, as manufactured, horizontal | 35%sourceOutokumpu typical, A5 |
| Young's modulus (stiffness) | 72GPasourcesame material and process, different machine maker: Renishaw RenAM 500, 30 µm, as built, horizontal (XY) | 200GPasourceat RT (Table 12) |
| Density | 2,670kg/m³sourcetypical part density (ISO 3369), EOS M 290, AlSi10Mg_030_FlexM291 (30 µm) | 7,900kg/m³sourceat RT |
| Strength to weight | 101kN·m/kg2.91x higher | 34.8kN·m/kg |
| 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) | 0.3sourcedesign value (structural stainless steels) |
| Shear modulus | 27.1GPa | 76.9GPa2.84x stiffer in shear |
| Bulk modulus | 70.6GPa | 167GPa |
| Speed of sound | 5,193m/s | 5,032m/s |
| Thermal | ||
| Thermal conductivity | 110W/m·Ksourcetypical, as manufactured, horizontal (ISO 22007-2) | 15W/m·Ksourceat RT |
| Thermal expansion | 20µm/m·Ksourcemean 25-100 °C, ASTM E228 | 16µm/m·Ksourcemean, 20–100 °C |
| 100 mm part over a 50 °C swing | 100µm growth | 80µm growth25% less |
| Specific heat | 963J/kg·Ksourcebase material: cast Al-Si-Mg alloy 359.0 (MIL-HDBK-5J), at 100 °C | 500J/kg·Ksourceat RT |
| Heats up and cools (diffusivity) | 42.8mm²/s11.3x faster | 3.8mm²/s |
| Thermal shock resistance | 13,819W/m15.3x more resistant | 902W/m |
| Max service temperature | not sourced | 871°Csourcecontinuous, scaling limit |
| 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 | 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 |
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 303?
Stainless 303 is stronger: its yield strength is 275 MPa against 270 MPa for DMLS AlSi10Mg Aluminum (2%).
Which is lighter, DMLS AlSi10Mg Aluminum or Stainless 303?
DMLS AlSi10Mg Aluminum is lighter: 2,670 kg/m³ against 7,900 kg/m³ for Stainless 303.
Which is stiffer, DMLS AlSi10Mg Aluminum or Stainless 303?
Stainless 303 is stiffer: Young's modulus 200 GPa against 72 GPa for DMLS AlSi10Mg Aluminum, so the same part in Stainless 303 deflects less under the same load.
Which is lighter for the same job, DMLS AlSi10Mg Aluminum or Stainless 303?
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 rod or tie, strong beam, strong panel or plate.
| Part that must be | DMLS AlSi10Mg Aluminum | Stainless 303 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 7% heavier |
| Stiff beam (bending) | lighter | 1.78x heavier |
| Stiff panel or plate | lighter | 2.1x heavier |
| Strong rod or tie | lighter | 2.91x heavier |
| Strong beam | lighter | 2.92x heavier |
| Strong panel or plate | lighter | 2.93x 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 303?
DMLS AlSi10Mg Aluminum conducts heat better: 110 W/m·K against 15 W/m·K for Stainless 303.
Which expands less with temperature?
Stainless 303 expands less: 16 µm/m·K against 20 µm/m·K for DMLS AlSi10Mg Aluminum.