Materials / Compare
Plastic PTFE vs. Steel A992
Compare Plastic PTFE vs. Steel A992 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) | 385MPasourcetypical: mean of 20,295 A992 flange mill-test coupons (1998 SSPC survey), as reported by AISC |
| Ultimate tensile strength | 39.3MPasourcetypical, skived tape 0.13 mm | 505MPasourcetypical: mean of 20,295 A992 flange mill-test coupons (1998 SSPC survey) |
| Elongation at break | 350%sourcetypical, skived tape 0.13 mm | not sourced |
| Young's modulus (stiffness) | not sourced | 200GPasourcedesign value (AISC 360-16) |
| Density | 2,160kg/m³sourcetypical (standard specific gravity, ASTM D4894) | 7,850kg/m³sourcenominal (constructional data) |
| Strength to weight | 4.17kN·m/kg | 49kN·m/kg11.8x higher |
| Stiffness to weight | not sourced | 25.5MN·m/kg |
| Poisson's ratio | 0.46sourcetypical, 23 °C (Teflon PTFE resins, Chemours handbook) | 0.3sourcedesign value (AISC 360-16 Commentary) |
| Shear modulus | not sourced | 76.9GPa |
| Bulk modulus | not sourced | 167GPa |
| Speed of sound | not sourced | 5,048m/s |
| Thermal | ||
| Thermal conductivity | 0.25W/m·Ksourcetypical, granular resin, 4.6 mm specimen | 48W/m·Ksourcenominal at 20 °C |
| Thermal expansion | 100µm/m·Ksourcetypical, granular resin, 23-60 °C (ASTM E228) | 12µm/m·Ksourcenominal (constructional data, no temperature range stated) |
| 100 mm part over a 50 °C swing | 500µm growth | 60µm growth8.33x less |
| Specific heat | 1,400J/kg·Ksourcetypical, granular resin, 20 °C (ASTM D4591) | 460–480J/kg·Ksourcebase material: EN S275JR unalloyed structural steel (the EN counterpart of A36), typical, 50/100 °C |
| Heats up and cools (diffusivity) | 0.0827mm²/s | 13mm²/s157x faster |
| Thermal shock resistance | not sourced | 5,390W/m |
| Melting point | 327°Csourcesecond melting peak (sintered polymer), +/-10 | not sourced |
| 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) | ASTM A992 W-shapes; Fy/Fu specified minimums from AISC publications (AISC 360-16 Commentary; Modern Steel Construction); elastic constants AISC 360; physical constants from the bauforumstahl structural-steel EPD, which names A992 among covered product standards. |
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.
Questions
Is Plastic PTFE stronger than Steel A992?
Steel A992 is stronger: its yield strength is 385 MPa against 9 MPa for Plastic PTFE (42.8x).
Which is lighter, Plastic PTFE or Steel A992?
Plastic PTFE is lighter: 2,160 kg/m³ against 7,850 kg/m³ for Steel A992.
Which is lighter for the same job, Plastic PTFE or Steel A992?
For the same stiffness or strength: Steel A992 is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Plastic PTFE | Steel A992 |
|---|---|---|
| Strong rod or tie | 11.8x heavier | lighter |
| Strong beam | 3.37x heavier | lighter |
| Strong panel or plate | 1.8x 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 Steel A992?
Steel A992 conducts heat better: 48 W/m·K against 0.25 W/m·K for Plastic PTFE.
Which expands less with temperature?
Steel A992 expands less: 12 µm/m·K against 100 µm/m·K for Plastic PTFE.