Materials / Compare
DMLS AlSi10Mg Aluminum vs. Plastic PBT GF30
Compare DMLS AlSi10Mg Aluminum vs. Plastic PBT GF30 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 | not given (tensile used) |
| Ultimate tensile strength | 450MPasourcetypical, as manufactured, horizontal | 140MPasourcestress at break, 23 °C |
| Flexural strength | not sourced | 210MPasourcetypical, 23 °C |
| Elongation at break | 10.2%sourcetypical at break, as manufactured, horizontal | 3%sourcestrain at break, 23 °C |
| Young's modulus (stiffness) | 72GPasourcesame material and process, different machine maker: Renishaw RenAM 500, 30 µm, as built, horizontal (XY) | 9.8GPasourcetypical, 23 °C |
| Density | 2,670kg/m³sourcetypical part density (ISO 3369), EOS M 290, AlSi10Mg_030_FlexM291 (30 µm) | 1,530kg/m³sourcetypical |
| Strength to weight | 101kN·m/kg11% higher | 91.5kN·m/kg |
| Stiffness to weight | 27MN·m/kg4.21x higher | 6.41MN·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) | not sourced |
| Shear modulus | 27.1GPa | not sourced |
| Bulk modulus | 70.6GPa | not sourced |
| Speed of sound | 5,193m/s | 2,531m/s |
| Thermal | ||
| Thermal conductivity | 110W/m·Ksourcetypical, as manufactured, horizontal (ISO 22007-2) | 0.27W/m·Ksourcetypical (DIN 52612-1) |
| Thermal expansion | 20µm/m·Ksourcemean 25-100 °C, ASTM E228 | 25µm/m·Ksourcelongitudinal (flow), mean 23-55 °C |
| 100 mm part over a 50 °C swing | 100µm growth25% less | 125µm growth |
| Specific heat | 963J/kg·Ksourcebase material: cast Al-Si-Mg alloy 359.0 (MIL-HDBK-5J), at 100 °C | 1,050J/kg·Ksourcetypical, 23 °C |
| Heats up and cools (diffusivity) | 42.8mm²/s255x faster | 0.168mm²/s |
| Thermal shock resistance | 13,819W/m | not sourced |
| Melting point | not sourced | 223°CsourceDSC (ISO 11357) |
| Max service temperature | not sourced | 205°CsourceHDT 1.8 MPa |
| 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 | BASF Ultradur B 4300 G6 (PBT, 30% glass fibre), injection moulding grade; product information sheet 09/2026, typical values for uncoloured product at 23 °C. |
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 PBT GF30?
DMLS AlSi10Mg Aluminum is stronger: its yield strength is 270 MPa against tensile strength 140 MPa for Plastic PBT GF30 (1.93x).
Which is lighter, DMLS AlSi10Mg Aluminum or Plastic PBT GF30?
Plastic PBT GF30 is lighter: 1,530 kg/m³ against 2,670 kg/m³ for DMLS AlSi10Mg Aluminum.
Which is stiffer, DMLS AlSi10Mg Aluminum or Plastic PBT GF30?
DMLS AlSi10Mg Aluminum is stiffer: Young's modulus 72 GPa against 9.8 GPa for Plastic PBT GF30, so the same part in DMLS AlSi10Mg Aluminum deflects less under the same load.
Which is lighter for the same job, DMLS AlSi10Mg Aluminum or Plastic PBT GF30?
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; Plastic PBT GF30 is lighter for a strong beam, strong panel or plate.
| Part that must be | DMLS AlSi10Mg Aluminum | Plastic PBT GF30 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 4.21x heavier |
| Stiff beam (bending) | lighter | 1.55x heavier |
| Stiff panel or plate | lighter | 11% heavier |
| Strong rod or tie | lighter | 11% heavier |
| Strong beam | 13% heavier | lighter |
| Strong panel or plate | 26% 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 AlSi10Mg Aluminum or Plastic PBT GF30?
DMLS AlSi10Mg Aluminum conducts heat better: 110 W/m·K against 0.27 W/m·K for Plastic PBT GF30.
Which expands less with temperature?
DMLS AlSi10Mg Aluminum expands less: 20 µm/m·K against 25 µm/m·K for Plastic PBT GF30.