POM-C GF25 GF20 vs POM-C GF25 GF30
Polymer · POM-C GF25 grade comparison
POM-C GF25 GF20 and POM-C GF25 GF30 are two grades of the same polymer grade, POM-C GF25: GF20 (20% glass fiber reinforced POM-C) versus GF30 (30% glass fiber reinforced POM-C). The chemistry is identical, so every difference below comes from the condition. POM-C GF25 GF30 is the stronger of the two: tensile strength 130 MPa (18.9 ksi) against 105 MPa (15.2 ksi) for POM-C GF25 GF20, about 24% more. In exchange, POM-C GF25 GF20 is the more ductile: elongation 3.5% versus 2.5% for POM-C GF25 GF30. POM-C GF25 GF20 is lighter (1.55 g/cm³ vs 1.65 g/cm³ for POM-C GF25 GF30) and POM-C GF25 GF30 is stiffer (10 GPa vs 7 GPa). On the shop floor, POM-C GF25 GF30 welds better (fair vs poor).
POM-C GF25 GF20Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
POM-C GF25 GF30Choose it when strength drives the design, or when the part sees heat.
POM-C GF25 GF20 vs POM-C GF25 GF30: 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 GF25 GF20POM-C GF25 GF30
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Flexural Strength
Flexural Modulus
Shear Strength
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Hardness, Rockwell R
Same in both: Shear Modulus 3 GPa0.44 Msi · Poisson's Ratio 0.36 · Compressive Modulus 7 GPa1 Msi
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 165°C329 °F · Glass Transition (Tg) -60°C-76 °F · Water Absorption (24 h) 0.2% · Water Absorption (Saturation) 0.65%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
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)
Same in both: Specific Heat Capacity 1,400 J/kg·K0.33 BTU/lb·°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 22 kV/mm559 V/mil · Dielectric Constant (1 MHz) 4 · Dissipation Factor (1 MHz) 0.006 · 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 80 / 100 · UV / Weathering Resistance 25 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Mold Shrinkage
Melt Flow Rate
Same in both: Polishability 30 / 100 · Processing Melt Temperature (typ.) 205°C401 °F · Mold Temperature (typ.) 90°C194 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 85 MJ/kg36,543 BTU/lb · Embodied Carbon (primary production) 3.8 kg CO₂/kg · Embodied Water 190 L/kg22.8 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-C GF25 GF20 vs POM-C GF25 GF30 — frequently asked
Is POM-C GF25 GF30 stronger than POM-C GF25 GF20?
Yes. POM-C GF25 GF30 has a typical tensile strength of 130 MPa (18.9 ksi) against 105 MPa (15.2 ksi) for POM-C GF25 GF20 — about 24% more.
Which grade does FabDigit quote by default, GF20 or GF30?
GF25 is the default POM-C GF25 condition in the FabDigit quote flow (neither GF20 nor GF30). The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, POM-C GF25 GF20 or POM-C GF25 GF30?
POM-C GF25 GF30. Its machinability rates very good (70/100) against good (62/100) for POM-C GF25 GF20; for welding the order is POM-C GF25 GF30 first (fair, 40/100) then POM-C GF25 GF20 (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in POM-C GF25 GF20 and POM-C GF25 GF30 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.