ePTFE vs FEP vs PCTFE vs PFA
Benchmark · 4 materials
Side-by-side benchmark of 4 polymer grades.
ePTFE vs FEP and 2 more: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Hardness, Shore D
Compression Set (22 h, 70 °C)
Shear Modulus
Yield Strength (0.2% offset)
Flexural Modulus
Izod Impact, Notched
Hardness, Rockwell R
Compressive Modulus
Flexural Strength
Shear Strength
Hardness, Shore A
Physical
Density and transition temperatures.
Density
Melting Temperature (Tm)
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
Refractive Index
Light Transmission
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Max Service Temperature (short-term)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Same in both: Limiting Oxygen Index 95%
Electrical
Conductivity and insulation.
Dielectric Strength
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Surface Resistivity
Comparative Tracking Index (CTI)
Same in both: Electrical Resistivity 1×10¹⁶ Ω·m3.94×10²³ µΩ·in · Volume Resistivity 1×10¹⁸ Ω·cm
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
UV / Weathering Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Processing Melt Temperature (typ.)
Polishability
Mold Shrinkage
Melt Flow Rate
Mold Temperature (typ.)
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Same in both: Thermal Diffusivity 0.1 mm²/s · Thermal Shock Resistance Index 0
Strength versus weight
Yield strength against density for every polymer grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | ePTFE | FEP | PCTFE | PFA |
|---|---|---|---|---|
| CNC machining | Yes | Yes | Yes | |
| Sheet metal | Yes | Yes | Yes | |
| Injection molding | Yes | Yes | Yes | |
| Default condition | Unfilled | Unfilled | High Purity (Semiconductor) | |
| Relative cost | $$$$ High | $$$$$ Specialty | $$$$$ Specialty | $$$$$ Specialty |
| Min. machined wall | 0.5 mm | 0.5 mm | 0.5 mm | |
| Best machined surface | Ra 0.8 µm | Ra 0.8 µm | Ra 0.8 µm | |
| Chrome Plating (Plastic) | Yes | Yes | Yes | |
| EMI Shielding Coating | Yes | Yes | Yes | |
| Painting | Yes | Yes | Yes | |
| Soft Touch Coating | Yes | Yes | Yes | |
| Spray Painting | Yes | Yes | Yes | |
| UV Coating | Yes | Yes | Yes |
Ready to make it?
Upload a CAD file and FabDigit prices the part in ePTFE and FEP side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.