Materials / Compare
DMLS Ti-6Al-4V ELI Titanium vs. Silicon
Compare DMLS Ti-6Al-4V ELI Titanium vs. Silicon strength, stiffness, weight and thermal properties.
| Try it on a partA sample part to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | 1,100MPasourcetypical, as built, average of horizontal + vertical (M400) | not given (tensile used) |
| Ultimate tensile strength | 1,270MPasourcetypical, as built, average of horizontal + vertical (M400) | 130MPasourcemodulus of rupture (bending fracture stress); brittle, no yield point |
| Flexural strength | not sourced | 130MPasourcemodulus of rupture |
| Elongation at break | 8.7%sourcetypical at break, as built (M400) | not sourced |
| Young's modulus (stiffness) | 110GPasourcesame maker and process, sibling grade: EOS Titanium Ti64 (Grade 5) on EOS M 290, as built, XY and Z, typical | 131GPasourcetypical (single quoted value of an anisotropic crystal) |
| Density | 4,400kg/m³sourcetypical part density (ISO 3369), M400 | 2,329kg/m³sourcetypical |
| Strength to weight | 250kN·m/kg4.48x higher | 55.8kN·m/kg |
| Stiffness to weight | 25MN·m/kg | 56.2MN·m/kg2.25x higher |
| Poisson's ratio | 0.342sourcewrought TIMETAL 6-4 (TIMET measurement, mean of 10); composition-level, not DMLS-measured | 0.221sourcetypical |
| Shear modulus | 41GPa | 53.6GPa31% stiffer in shear |
| Bulk modulus | 116GPa | 78.3GPa |
| Speed of sound | 5,000m/s | 7,500m/s |
| Thermal | ||
| Thermal conductivity | 6.6W/m·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C | 163W/m·Ksourcetypical at 313 K (40 °C) |
| Thermal expansion | 9µm/m·Ksourcemean 25-100 °C, ASTM E228; EOS Ti64 Grade 23 (=ELI) on EOS M 290 40 µm; condition not stated (sheet's mechanical data are heat treated) | 2.62µm/m·Ksourcetypical at 300 K |
| 100 mm part over a 50 °C swing | 45µm growth | 13.1µm growth3.44x less |
| Specific heat | 580J/kg·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C | 732J/kg·Ksourcetypical |
| Heats up and cools (diffusivity) | 2.59mm²/s | 95.6mm²/s37x faster |
| Thermal shock resistance | 4,825W/m | 48,095W/m9.97x more resistant |
| Melting point | 1,630–1,650°Csourcemelting range, wrought TIMETAL 6-4 (composition-level) | 1,412°Csourcetypical |
| Max service temperature | not sourced | 300°Csourceproducer's maximum application temperature (optical components) |
| Values for | EOS Titanium Ti64ELI (powder 9011-0040; ASTM F136/F3001, i.e. Grade 23) on EOS M400 SF, parameter set Ti64ELI_030_FlexM400_100, 30 µm, as built; ISO 6892-1 A14 | Synthetic single-crystal silicon (cubic, diamond structure), Korth Kristalle (crystal grower) material data; Korth usually supplies Floating Zone (FZ) material, Czochralski (Cz) also offered. Silicon is elastically anisotropic; the producer quotes one modulus and the solver is isotropic. |
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 Ti-6Al-4V ELI Titanium is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is DMLS Ti-6Al-4V ELI Titanium stronger than Silicon?
DMLS Ti-6Al-4V ELI Titanium is stronger: its yield strength is 1,100 MPa against tensile strength 130 MPa for Silicon (8.46x).
Which is lighter, DMLS Ti-6Al-4V ELI Titanium or Silicon?
Silicon is lighter: 2,329 kg/m³ against 4,400 kg/m³ for DMLS Ti-6Al-4V ELI Titanium.
Which is stiffer, DMLS Ti-6Al-4V ELI Titanium or Silicon?
Silicon is stiffer: Young's modulus 131 GPa against 110 GPa for DMLS Ti-6Al-4V ELI Titanium, so the same part in Silicon deflects less under the same load.
Which is lighter for the same job, DMLS Ti-6Al-4V ELI Titanium or Silicon?
For the same stiffness or strength: DMLS Ti-6Al-4V ELI Titanium is lighter for a strong rod or tie, strong beam, strong panel or plate; Silicon is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate.
| Part that must be | DMLS Ti-6Al-4V ELI Titanium | Silicon |
|---|---|---|
| Stiff rod or tie (tension) | 2.25x heavier | lighter |
| Stiff beam (bending) | 2.06x heavier | lighter |
| Stiff panel or plate | 2x heavier | lighter |
| Strong rod or tie | lighter | 4.48x heavier |
| Strong beam | lighter | 2.2x heavier |
| Strong panel or plate | lighter | 1.54x 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 Ti-6Al-4V ELI Titanium or Silicon?
Silicon conducts heat better: 163 W/m·K against 6.6 W/m·K for DMLS Ti-6Al-4V ELI Titanium.
Which expands less with temperature?
Silicon expands less: 2.62 µm/m·K against 9 µm/m·K for DMLS Ti-6Al-4V ELI Titanium.