Materials / Compare
DMLS AlSi10Mg Aluminum vs. Plastic PTFE
Compare DMLS AlSi10Mg Aluminum vs. Plastic PTFE 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 | 9MPasourcetypical yield strength at 23 °C (Teflon PTFE, Table 8) |
| Ultimate tensile strength | 450MPasourcetypical, as manufactured, horizontal | 39.3MPasourcetypical, skived tape 0.13 mm |
| Elongation at break | 10.2%sourcetypical at break, as manufactured, horizontal | 350%sourcetypical, skived tape 0.13 mm |
| Young's modulus (stiffness) | 72GPasourcesame material and process, different machine maker: Renishaw RenAM 500, 30 µm, as built, horizontal (XY) | not sourced |
| Density | 2,670kg/m³sourcetypical part density (ISO 3369), EOS M 290, AlSi10Mg_030_FlexM291 (30 µm) | 2,160kg/m³sourcetypical (standard specific gravity, ASTM D4894) |
| Strength to weight | 101kN·m/kg24.3x higher | 4.17kN·m/kg |
| Stiffness to weight | 27MN·m/kg | not sourced |
| 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) | 0.46sourcetypical, 23 °C (Teflon PTFE resins, Chemours handbook) |
| Shear modulus | 27.1GPa | not sourced |
| Bulk modulus | 70.6GPa | not sourced |
| Speed of sound | 5,193m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 110W/m·Ksourcetypical, as manufactured, horizontal (ISO 22007-2) | 0.25W/m·Ksourcetypical, granular resin, 4.6 mm specimen |
| Thermal expansion | 20µm/m·Ksourcemean 25-100 °C, ASTM E228 | 100µm/m·Ksourcetypical, granular resin, 23-60 °C (ASTM E228) |
| 100 mm part over a 50 °C swing | 100µm growth5x less | 500µm growth |
| Specific heat | 963J/kg·Ksourcebase material: cast Al-Si-Mg alloy 359.0 (MIL-HDBK-5J), at 100 °C | 1,400J/kg·Ksourcetypical, granular resin, 20 °C (ASTM D4591) |
| Heats up and cools (diffusivity) | 42.8mm²/s517x faster | 0.0827mm²/s |
| Thermal shock resistance | 13,819W/m | not sourced |
| Melting point | not sourced | 327°Csourcesecond melting peak (sintered polymer), +/-10 |
| Max service temperature | not sourced | 260°Csourceservice temperature (Chemours general Teflon PTFE statement) |
| 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 | Chemours Teflon PTFE 7C X granular molding resin, typical values (tensile/elongation measured on 0.13 mm skived tape) |
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 Plastic PTFE?
DMLS AlSi10Mg Aluminum is stronger: its yield strength is 270 MPa against 9 MPa for Plastic PTFE (30x).
Which is lighter, DMLS AlSi10Mg Aluminum or Plastic PTFE?
Plastic PTFE is lighter: 2,160 kg/m³ against 2,670 kg/m³ for DMLS AlSi10Mg Aluminum.
Which is lighter for the same job, DMLS AlSi10Mg Aluminum or Plastic PTFE?
For the same stiffness or strength: DMLS AlSi10Mg Aluminum is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | DMLS AlSi10Mg Aluminum | Plastic PTFE |
|---|---|---|
| Strong rod or tie | lighter | 24.3x heavier |
| Strong beam | lighter | 7.81x heavier |
| Strong panel or plate | lighter | 4.43x 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 Plastic PTFE?
DMLS AlSi10Mg Aluminum conducts heat better: 110 W/m·K against 0.25 W/m·K for Plastic PTFE.
Which expands less with temperature?
DMLS AlSi10Mg Aluminum expands less: 20 µm/m·K against 100 µm/m·K for Plastic PTFE.