Materials / Compare
Plastic PTFE vs. DMLS Ti-6Al-4V ELI Titanium
Compare Plastic PTFE 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 | 9MPasourcetypical yield strength at 23 °C (Teflon PTFE, Table 8) | 1,100MPasourcetypical, as built, average of horizontal + vertical (M400) |
| Ultimate tensile strength | 39.3MPasourcetypical, skived tape 0.13 mm | 1,270MPasourcetypical, as built, average of horizontal + vertical (M400) |
| Elongation at break | 350%sourcetypical, skived tape 0.13 mm | 8.7%sourcetypical at break, as built (M400) |
| Young's modulus (stiffness) | not sourced | 110GPasourcesame maker and process, sibling grade: EOS Titanium Ti64 (Grade 5) on EOS M 290, as built, XY and Z, typical |
| Density | 2,160kg/m³sourcetypical (standard specific gravity, ASTM D4894) | 4,400kg/m³sourcetypical part density (ISO 3369), M400 |
| Strength to weight | 4.17kN·m/kg | 250kN·m/kg60x higher |
| Stiffness to weight | not sourced | 25MN·m/kg |
| Poisson's ratio | 0.46sourcetypical, 23 °C (Teflon PTFE resins, Chemours handbook) | 0.342sourcewrought TIMETAL 6-4 (TIMET measurement, mean of 10); composition-level, not DMLS-measured |
| Shear modulus | not sourced | 41GPa |
| Bulk modulus | not sourced | 116GPa |
| Speed of sound | not sourced | 5,000m/s |
| Thermal | ||
| Thermal conductivity | 0.25W/m·Ksourcetypical, granular resin, 4.6 mm specimen | 6.6W/m·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C |
| Thermal expansion | 100µm/m·Ksourcetypical, granular resin, 23-60 °C (ASTM E228) | 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 | 500µm growth | 45µm growth11.1x less |
| Specific heat | 1,400J/kg·Ksourcetypical, granular resin, 20 °C (ASTM D4591) | 580J/kg·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C |
| Heats up and cools (diffusivity) | 0.0827mm²/s | 2.59mm²/s31.3x faster |
| Thermal shock resistance | not sourced | 4,825W/m |
| Melting point | 327°Csourcesecond melting peak (sintered polymer), +/-10 | 1,630–1,650°Csourcemelting range, wrought TIMETAL 6-4 (composition-level) |
| Max service temperature | 260°Csourceservice temperature (Chemours general Teflon PTFE statement) | not sourced |
| Values for | Chemours Teflon PTFE 7C X granular molding resin, typical values (tensile/elongation measured on 0.13 mm skived tape) | 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 PTFE stronger than DMLS Ti-6Al-4V ELI Titanium?
DMLS Ti-6Al-4V ELI Titanium is stronger: its yield strength is 1,100 MPa against 9 MPa for Plastic PTFE (122x).
Which is lighter, Plastic PTFE or DMLS Ti-6Al-4V ELI Titanium?
Plastic PTFE is lighter: 2,160 kg/m³ against 4,400 kg/m³ for DMLS Ti-6Al-4V ELI Titanium.
Which is lighter for the same job, Plastic PTFE or DMLS Ti-6Al-4V ELI Titanium?
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.
| Part that must be | Plastic PTFE | DMLS Ti-6Al-4V ELI Titanium |
|---|---|---|
| Strong rod or tie | 60x heavier | lighter |
| Strong beam | 12.1x heavier | lighter |
| Strong panel or plate | 5.43x 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, Plastic PTFE or DMLS Ti-6Al-4V ELI Titanium?
DMLS Ti-6Al-4V ELI Titanium conducts heat better: 6.6 W/m·K against 0.25 W/m·K for Plastic PTFE.
Which expands less with temperature?
DMLS Ti-6Al-4V ELI Titanium expands less: 9 µm/m·K against 100 µm/m·K for Plastic PTFE.