Materials / Compare
Plastic PMMA vs. DMLS Ti-6Al-4V ELI Titanium
Compare Plastic PMMA vs. DMLS Ti-6Al-4V ELI Titanium 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 | not given (tensile used) | 1,100MPasourcetypical, as built, average of horizontal + vertical (M400) |
| Ultimate tensile strength | 80MPasourcetypical, 23 °C | 1,270MPasourcetypical, as built, average of horizontal + vertical (M400) |
| Compressive strength | 110MPasourcecompressive yield stress, typical | not sourced |
| Flexural strength | 115MPasourcetypical | not sourced |
| Elongation at break | 5.5%sourcetypical | 8.7%sourcetypical at break, as built (M400) |
| Young's modulus (stiffness) | 3.3GPasourcetypical, short-term | 110GPasourcesame maker and process, sibling grade: EOS Titanium Ti64 (Grade 5) on EOS M 290, as built, XY and Z, typical |
| Density | 1,190kg/m³sourcetypical | 4,400kg/m³sourcetypical part density (ISO 3369), M400 |
| Strength to weight | 67.2kN·m/kg | 250kN·m/kg3.72x higher |
| Stiffness to weight | 2.77MN·m/kg | 25MN·m/kg9.02x higher |
| Poisson's ratio | 0.37sourcetypical | 0.342sourcewrought TIMETAL 6-4 (TIMET measurement, mean of 10); composition-level, not DMLS-measured |
| Shear modulus | 1.2GPa | 41GPa34x stiffer in shear |
| Bulk modulus | 4.23GPa | 116GPa |
| Speed of sound | 1,665m/s | 5,000m/s |
| Thermal | ||
| Thermal conductivity | 0.19W/m·Ksourcetypical | 6.6W/m·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C |
| Thermal expansion | 70µm/m·Ksource0-50 °C | 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) |
| 100 mm part over a 50 °C swing | 350µm growth | 45µm growth7.78x less |
| Specific heat | 1,470J/kg·Ksourcetypical | 580J/kg·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C |
| Heats up and cools (diffusivity) | 0.109mm²/s | 2.59mm²/s23.8x faster |
| Thermal shock resistance | 41.5W/m | 4,825W/m116x more resistant |
| Melting point | not sourced | 1,630–1,650°Csourcemelting range, wrought TIMETAL 6-4 (composition-level) |
| Max service temperature | 80°Csourcemax. permanent service temperature | not sourced |
| Values for | Röhm PLEXIGLAS GS 0F00 cast acrylic sheet, typical values at 23 °C / 50 % RH (Röhm Technical Information Ref. No. 211-1) | 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 |
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 Plastic PMMA stronger than DMLS Ti-6Al-4V ELI Titanium?
DMLS Ti-6Al-4V ELI Titanium is stronger: its yield strength is 1,100 MPa against tensile strength 80 MPa for Plastic PMMA (13.8x).
Which is lighter, Plastic PMMA or DMLS Ti-6Al-4V ELI Titanium?
Plastic PMMA is lighter: 1,190 kg/m³ against 4,400 kg/m³ for DMLS Ti-6Al-4V ELI Titanium.
Which is stiffer, Plastic PMMA or DMLS Ti-6Al-4V ELI Titanium?
DMLS Ti-6Al-4V ELI Titanium is stiffer: Young's modulus 110 GPa against 3.3 GPa for Plastic PMMA, so the same part in DMLS Ti-6Al-4V ELI Titanium deflects less under the same load.
Which is lighter for the same job, Plastic PMMA or DMLS Ti-6Al-4V ELI Titanium?
For the same stiffness or strength: Plastic PMMA is lighter for a stiff panel or plate; DMLS Ti-6Al-4V ELI Titanium is lighter for a stiff rod or tie (tension), stiff beam (bending), strong rod or tie, strong beam.
| Part that must be | Plastic PMMA | DMLS Ti-6Al-4V ELI Titanium |
|---|---|---|
| Stiff rod or tie (tension) | 9.02x heavier | lighter |
| Stiff beam (bending) | 1.56x heavier | lighter |
| Stiff panel or plate | lighter | 15% heavier |
| Strong rod or tie | 3.72x heavier | lighter |
| Strong beam | 1.55x heavier | lighter |
| Strong panel or plate | about equal | about equal |
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, Plastic PMMA or DMLS Ti-6Al-4V ELI Titanium?
DMLS Ti-6Al-4V ELI Titanium conducts heat better: 6.6 W/m·K against 0.19 W/m·K for Plastic PMMA.
Which expands less with temperature?
DMLS Ti-6Al-4V ELI Titanium expands less: 9 µm/m·K against 70 µm/m·K for Plastic PMMA.
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