POM-C+PTFE vs POM-H HI
Polymer · grade comparison
POM-C+PTFE and POM-H HI are both polymer grades. POM-C+PTFE is the stronger of the two: tensile strength 48 MPa (6.96 ksi) against 45 MPa (6.53 ksi) for POM-H HI, about 7% more. In exchange, POM-H HI is the more ductile: elongation 220% versus 20% for POM-C+PTFE, and POM-C+PTFE is harder (79 Shore D vs 72 Shore D). POM-H HI is lighter (1.34 g/cm³ vs 1.54 g/cm³ for POM-C+PTFE) and POM-C+PTFE is stiffer (2.7 GPa vs 1.4 GPa). On the shop floor, POM-C+PTFE machines more easily (excellent vs very good) and POM-H HI welds better (fair vs not recommended).
POM-C+PTFEChoose it when strength drives the design, or when the part sees heat.
POM-H HIChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
POM-C+PTFE 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Fracture Toughness (K_IC)
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Hardness, Rockwell R
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)
Limiting Oxygen Index
Max Service Temperature (short-term)
Same in both: Min Service Temperature -50°C-58 °F
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).
UV / Weathering Resistance
Same in both: Corrosion Resistance 68 / 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)
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)
Modulus of Resilience
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 | POM-C+PTFE | POM-H HI |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$ Premium | $$$ Premium |
| Min. machined wall | — | — |
| Best machined surface | — | — |
POM-C+PTFE vs POM-H HI — frequently asked
Is POM-C+PTFE stronger than POM-H HI?
Yes. POM-C+PTFE has a typical tensile strength of 48 MPa (6.96 ksi) against 45 MPa (6.53 ksi) for POM-H HI — about 7% more.
Which is cheaper, POM-C+PTFE 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+PTFE or POM-H HI?
POM-C+PTFE. Its machinability rates excellent (85/100) against very good (72/100) for POM-H HI; for welding the order is POM-H HI first (fair, 45/100) then POM-C+PTFE (not recommended, 12/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in POM-C+PTFE 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.