PPE/PPO GF20 vs PPE/PPO GF40
Polymer · PPE/PPO grade comparison
PPE/PPO GF20 and PPE/PPO GF40 are two grades of the same polymer grade, PPE/PPO: GF20 (20% glass-fiber reinforced modified PPO) versus GF40 (40% glass-fiber reinforced modified PPO). The chemistry is identical, so every difference below comes from the condition. PPE/PPO GF40 is the stronger of the two: tensile strength 130 MPa (18.9 ksi) against 95 MPa (13.8 ksi) for PPE/PPO GF20, about 37% more. In exchange, PPE/PPO GF20 is the more ductile: elongation 4% versus 2.5% for PPE/PPO GF40. PPE/PPO GF20 is lighter (1.21 g/cm³ vs 1.36 g/cm³ for PPE/PPO GF40) and PPE/PPO GF40 is stiffer (11 GPa vs 6 GPa). On the shop floor, PPE/PPO GF20 welds better (very good vs fair).
PPE/PPO GF20Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PPE/PPO GF40Choose it when strength drives the design, or when the part sees heat.
PPE/PPO GF20 vs PPE/PPO GF40: 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
Same in both: Shear Modulus 0.9 GPa0.13 Msi · Poisson's Ratio 0.38 · Yield Strength (0.2% offset) 58 MPa8.4 ksi · Compressive Strength 90 MPa13.1 ksi · Compressive Modulus 2.4 GPa0.35 Msi · Shear Strength 45 MPa6.5 ksi · Hardness, Shore D 80 Shore D · Hardness, Rockwell R 119 HRR
Physical
Density and transition temperatures.
Density
Same in both: Glass Transition (Tg) 150°C302 °F · Water Absorption (24 h) 0.07% · Water Absorption (Saturation) 0.2%
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 1,400 J/kg·K0.33 BTU/lb·°F · Min Service Temperature -40°C-40 °F · Vicat Softening Point (B50) 140°C284 °F · Limiting Oxygen Index 24% · Max Service Temperature (short-term) 130°C266 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Dielectric Strength 20 kV/mm508 V/mil · Dielectric Constant (1 MHz) 2.6 · Dissipation Factor (1 MHz) 0.001 · Volume Resistivity 1×10¹⁶ Ω·cm · Surface Resistivity 1×10¹⁵ Ω · Comparative Tracking Index (CTI) 400 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 80 / 100 · UV / Weathering Resistance 35 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Mold Shrinkage
Same in both: Polishability 60 / 100 · Melt Flow Rate 8 g/10 min · Processing Melt Temperature (typ.) 280°C536 °F · Mold Temperature (typ.) 90°C194 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 100 MJ/kg42,992 BTU/lb · Embodied Carbon (primary production) 5 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 10%
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.
PPE/PPO GF20 vs PPE/PPO GF40 — frequently asked
Is PPE/PPO GF40 stronger than PPE/PPO GF20?
Yes. PPE/PPO GF40 has a typical tensile strength of 130 MPa (18.9 ksi) against 95 MPa (13.8 ksi) for PPE/PPO GF20 — about 37% more.
Which grade does FabDigit quote by default, GF20 or GF40?
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, PPE/PPO GF20 or PPE/PPO GF40?
PPE/PPO GF20. Its machinability rates good (58/100) against fair (50/100) for PPE/PPO GF40; for welding the order is PPE/PPO GF20 first (very good, 70/100) then PPE/PPO GF40 (fair, 50/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PPE/PPO GF20 and PPE/PPO GF40 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.