MFA vs PFA
Polymer · grade comparison
MFA and PFA are both polymer grades. PFA is the stronger of the two: yield strength 14 MPa (2.03 ksi) against 13 MPa (1.89 ksi) for MFA, about 8% more; tensile strength follows at 30 MPa (4.35 ksi) vs 28 MPa (4.06 ksi). In exchange, MFA is the more ductile: elongation 400% versus 330% for PFA. PFA is stiffer (0.6 GPa vs 0.55 GPa). On the shop floor, MFA sits in a lower cost tier (high, $$$$) than PFA (specialty, $$$$$).
MFAChoose it when the part is bent, formed or impact-loaded, or when cost is the deciding factor.
PFAChoose it when strength drives the design.
MFA vs PFA: 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)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Flexural Modulus
Hardness, Shore D
Hardness, Rockwell R
Flexural Strength
Shear Strength
Izod Impact, Notched
Hardness, Shore A
Physical
Density and transition temperatures.
Density
Melting Temperature (Tm)
Refractive Index
Light Transmission
Glass Transition (Tg)
Same in both: Water Absorption (24 h) 0.02% · Water Absorption (Saturation) 0.03%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Max Service Temperature (continuous)
Min Service Temperature
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Max Service Temperature (short-term)
Vicat Softening Point (B50)
Same in both: Thermal Expansion (CTE, 20–100 °C) 130 µm/m·K72.2 µin/in·°F · Limiting Oxygen Index 95%
Electrical
Conductivity and insulation.
Dielectric Strength
Dissipation Factor (1 MHz)
Same in both: Electrical Resistivity 1×10¹⁶ Ω·m3.94×10²³ µΩ·in · Dielectric Constant (1 MHz) 2.1 · Volume Resistivity 1×10¹⁸ Ω·cm · Surface Resistivity 1×10¹⁷ Ω · Comparative Tracking Index (CTI) 600 V
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.
Weldability
Formability (cold)
Polishability
Mold Shrinkage
Melt Flow Rate
Processing Melt Temperature (typ.)
Mold Temperature (typ.)
Same in both: Machinability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Same in both: Embodied Energy (primary production) 250 MJ/kg107,481 BTU/lb · Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Modulus of Resilience
Same in both: Specific Stiffness (E / density) 0.3 MN·m/kg · 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 | MFA | PFA |
|---|---|---|
| CNC machining | — | Yes |
| Sheet metal | — | Yes |
| Injection molding | — | Yes |
| Default condition | — | High Purity (Semiconductor) |
| Relative cost | $$$$ High | $$$$$ Specialty |
| Min. machined wall | — | 0.5 mm |
| Best machined surface | — | Ra 0.8 µm |
| Chrome Plating (Plastic) | — | Yes |
| EMI Shielding Coating | — | Yes |
| Painting | — | Yes |
| Soft Touch Coating | — | Yes |
| Spray Painting | — | Yes |
| UV Coating | — | Yes |
MFA vs PFA — frequently asked
Is PFA stronger than MFA?
Yes. PFA has a typical yield strength of 14 MPa (2.03 ksi) against 13 MPa (1.89 ksi) for MFA — about 8% more. Tensile strength is 30 MPa (4.35 ksi) vs 28 MPa (4.06 ksi).
Which is cheaper, MFA or PFA?
MFA is the lower-cost material: it sits in the high tier ($$$$) while PFA is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which welds better, MFA or PFA?
PFA. Its weldability rates very good (78/100) against very good (70/100) for MFA.
Ready to make it?
Upload a CAD file and FabDigit prices the part in MFA and PFA 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.