POM-C LF (PTFE-filled) vs POM-H HI
Polymer · grade comparison
POM-C LF (PTFE-filled) and POM-H HI are both polymer grades. Both yield at about 45 MPa — strength does not separate them. POM-H HI is the more ductile: elongation 220% versus 20% for POM-C LF (PTFE-filled), and POM-C LF (PTFE-filled) is harder (78 Shore D vs 72 Shore D). POM-H HI is lighter (1.34 g/cm³ vs 1.52 g/cm³ for POM-C LF (PTFE-filled)) and POM-C LF (PTFE-filled) is stiffer (2.5 GPa vs 1.4 GPa). On the shop floor, POM-C LF (PTFE-filled) machines more easily (excellent vs very good) and POM-H HI welds better (fair vs not recommended).
POM-C LF (PTFE-filled)Choose it when the part sees heat, or when the part is machined in volume.
POM-H HIChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
POM-C LF (PTFE-filled) vs POM-H HI: 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.
POM-C LF (PTFE-filled)POM-H HI
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Fracture Toughness (K_IC)
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Hardness, Rockwell R
Same in both: Yield Strength (0.2% offset) 45 MPa6.5 ksi · Shear Strength 45 MPa6.5 ksi
Physical
Density and transition temperatures.
Density
Melting Temperature (Tm)
Water Absorption (24 h)
Water Absorption (Saturation)
Same in both: Glass Transition (Tg) -60°C-76 °F
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)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Max Service Temperature (short-term)
Same in both: Min Service Temperature -50°C-58 °F · Limiting Oxygen Index 15%
Electrical
Conductivity and insulation.
Dielectric Strength
Surface Resistivity
Same in both: Electrical Resistivity 1×10¹² Ω·m3.94×10¹⁹ µΩ·in · Dielectric Constant (1 MHz) 3.7 · Dissipation Factor (1 MHz) 0.005 · Volume Resistivity 1×10¹⁴ Ω·cm · Comparative Tracking Index (CTI) 600 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: UV / Weathering Resistance 30 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Polishability
Mold Shrinkage
Melt Flow Rate
Processing Melt Temperature (typ.)
Same in both: Mold Temperature (typ.) 90°C194 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Same in both: Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Same in both: 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 | POM-C LF (PTFE-filled) | POM-H HI |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$ Premium | $$$ Premium |
| Min. machined wall | — | — |
| Best machined surface | — | — |
POM-C LF (PTFE-filled) vs POM-H HI — frequently asked
What is the difference between POM-C LF (PTFE-filled) and POM-H HI?
POM-C LF (PTFE-filled) and POM-H HI are both polymer grades. Both yield at about 45 MPa — strength does not separate them. POM-H HI is the more ductile: elongation 220% versus 20% for POM-C LF (PTFE-filled), and POM-C LF (PTFE-filled) is harder (78 Shore D vs 72 Shore D).
Which is cheaper, POM-C LF (PTFE-filled) or POM-H HI?
Both sit in the same relative cost tier ($$$, premium); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, POM-C LF (PTFE-filled) or POM-H HI?
POM-C LF (PTFE-filled). Its machinability rates excellent (88/100) against very good (72/100) for POM-H HI; for welding the order is POM-H HI first (fair, 45/100) then POM-C LF (PTFE-filled) (not recommended, 5/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in POM-C LF (PTFE-filled) and POM-H HI 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.