POM GF25 vs POM GF30
Polymer · POM grade comparison
POM GF25 and POM GF30 are two grades of the same polymer grade, POM: GF25 (25% glass fiber reinforced) versus GF30 (30% glass fiber reinforced). The chemistry is identical, so every difference below comes from the condition. Both yield at about 62 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (25% glass fiber reinforced versus 30% glass fiber reinforced). POM GF25 is the more ductile: elongation 3% versus 2.5% for POM GF30. POM GF30 is stiffer (9.5 GPa vs 8.5 GPa) and POM GF25 runs hotter in service (105°C vs 95°C continuous).
POM GF25Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
POM GF25 vs POM 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Elongation at Break
Flexural Strength
Flexural Modulus
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 · Yield Strength (0.2% offset) 62 MPa9 ksi · Compressive Strength 105 MPa15.2 ksi · Compressive Modulus 2.7 GPa0.39 Msi · Shear Strength 55 MPa8 ksi · Fracture Toughness (K_IC) 4 MPa·√m3.6 ksi·√in · 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 Conductivity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Same in both: Specific Heat Capacity 1,470 J/kg·K0.35 BTU/lb·°F · Min Service Temperature -40°C-40 °F · Vicat Softening Point (B50) 160°C320 °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
Mold Shrinkage
Same in both: Weldability 55 / 100 · Formability (cold) 40 / 100 · Polishability 70 / 100 · Melt Flow Rate 9 g/10 min · Processing Melt Temperature (typ.) 200°C392 °F · 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 GF25 vs POM GF30 — frequently asked
What is the difference between POM GF25 and POM GF30?
POM GF25 and POM GF30 are two grades of the same polymer grade, POM: GF25 (25% glass fiber reinforced) versus GF30 (30% glass fiber reinforced). The chemistry is identical, so every difference below comes from the condition. Both yield at about 62 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (25% glass fiber reinforced versus 30% glass fiber reinforced).
Which grade does FabDigit quote by default, GF25 or GF30?
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 GF25 or POM GF30?
POM GF25, by a small margin. Both rate good for machinability — 60/100 against 55/100 for POM GF30.
Ready to make it?
Upload a CAD file and FabDigit prices the part in POM GF25 and POM 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.