POM GF30 vs POM HF
Polymer · POM grade comparison
POM GF30 and POM HF are two grades of the same polymer grade, POM: GF30 (30% glass fiber reinforced) versus HF (high-flow / thin-wall injection grade). The chemistry is identical, so every difference below comes from the condition. POM GF30 is the stronger of the two: tensile strength 135 MPa (19.6 ksi) against 61 MPa (8.85 ksi) for POM HF, about 121% more. In exchange, POM HF is the more ductile: elongation 20% versus 2.5% for POM GF30. POM HF is lighter (1.41 g/cm³ vs 1.63 g/cm³ for POM GF30) and POM GF30 is stiffer (9.5 GPa vs 2.9 GPa). On the shop floor, POM HF machines more easily (excellent vs good) and POM GF30 welds better (good vs fair).
POM GF30Choose it when strength drives the design, or when it will be welded.
POM HFChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
POM GF30 vs POM HF: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Flexural Strength
Flexural Modulus
Shear Strength
Fracture Toughness (K_IC)
Izod Impact, Notched
Hardness, Rockwell M
Same in both: Shear Modulus 1.1 GPa0.15 Msi · Bulk Modulus 3 GPa0.45 Msi · Poisson's Ratio 0.35 · Compressive Modulus 2.7 GPa0.39 Msi · Hardness, Shore D 81 Shore D · Hardness, Rockwell R 120 HRR
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 166°C331 °F · Glass Transition (Tg) -60°C-76 °F · Water Absorption (24 h) 0.22% · Water Absorption (Saturation) 0.8%
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Vicat Softening Point (B50)
Same in both: Thermal Conductivity 0.31 W/m·K0.18 BTU/hr·ft·°F · Specific Heat Capacity 1,470 J/kg·K0.35 BTU/lb·°F · Max Service Temperature (continuous) 95°C203 °F · Min Service Temperature -40°C-40 °F · Limiting Oxygen Index 15% · Max Service Temperature (short-term) 140°C284 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹² Ω·m3.94×10¹⁹ µΩ·in · Dielectric Strength 20 kV/mm508 V/mil · Dielectric Constant (1 MHz) 3.7 · Dissipation Factor (1 MHz) 0.005 · Volume Resistivity 1×10¹⁴ Ω·cm · Surface Resistivity 1×10¹⁴ Ω · Comparative Tracking Index (CTI) 600 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 70 / 100 · UV / Weathering Resistance 30 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Mold Shrinkage
Melt Flow Rate
Processing Melt Temperature (typ.)
Same in both: Polishability 70 / 100 · Mold Temperature (typ.) 85°C185 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 100 MJ/kg42,992 BTU/lb · Embodied Carbon (primary production) 4.5 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 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.
POM GF30 vs POM HF — frequently asked
Is POM GF30 stronger than POM HF?
Yes. POM GF30 has a typical tensile strength of 135 MPa (19.6 ksi) against 61 MPa (8.85 ksi) for POM HF — about 121% more.
Which grade does FabDigit quote by default, GF30 or HF?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
Which is easier to machine, POM GF30 or POM HF?
POM HF. Its machinability rates excellent (88/100) against good (55/100) for POM GF30; for welding the order is POM GF30 first (good, 55/100) then POM HF (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in POM GF30 and POM HF 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.