PC/PET GF30 vs PC/PET MF
Polymer · PC/PET grade comparison
PC/PET GF30 and PC/PET MF are two grades of the same polymer grade, PC/PET: GF30 (30 % glass-fiber reinforced) versus MF (mineral / talc filled grade). The chemistry is identical, so every difference below comes from the condition. PC/PET GF30 is the stronger of the two: tensile strength 115 MPa (16.7 ksi) against 55 MPa (7.98 ksi) for PC/PET MF, about 109% more. In exchange, PC/PET MF is the more ductile: elongation 30% versus 3.5% for PC/PET GF30. PC/PET MF is lighter (1.35 g/cm³ vs 1.43 g/cm³ for PC/PET GF30) and PC/PET GF30 is stiffer (7.5 GPa vs 3 GPa). On the shop floor, PC/PET MF machines more easily (good vs fair) and PC/PET GF30 welds better (very good vs good).
PC/PET GF30Choose it when strength drives the design, or when it will be welded.
PC/PET MFChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PC/PET GF30 vs PC/PET MF: 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
Izod Impact, Notched
Hardness, Rockwell M
Hardness, Rockwell R
Same in both: Poisson's Ratio 0.4
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 250°C482 °F · Glass Transition (Tg) 140°C284 °F · Water Absorption (24 h) 0.15% · Water Absorption (Saturation) 0.4%
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)
Limiting Oxygen Index
Same in both: Specific Heat Capacity 1,300 J/kg·K0.31 BTU/lb·°F · Min Service Temperature -40°C-40 °F · Max Service Temperature (short-term) 130°C266 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Dielectric Strength 22 kV/mm559 V/mil · Dielectric Constant (1 MHz) 3.1 · Dissipation Factor (1 MHz) 0.012 · Volume Resistivity 1×10¹⁶ Ω·cm · Surface Resistivity 1×10¹⁶ Ω · Comparative Tracking Index (CTI) 250 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: UV / Weathering Resistance 35 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Mold Shrinkage
Melt Flow Rate
Same in both: Polishability 55 / 100 · Processing Melt Temperature (typ.) 265°C509 °F · Mold Temperature (typ.) 75°C167 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 105 MJ/kg45,142 BTU/lb · Embodied Carbon (primary production) 5.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 20%
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.
PC/PET GF30 vs PC/PET MF — frequently asked
Is PC/PET GF30 stronger than PC/PET MF?
Yes. PC/PET GF30 has a typical tensile strength of 115 MPa (16.7 ksi) against 55 MPa (7.98 ksi) for PC/PET MF — about 109% more.
Which grade does FabDigit quote by default, GF30 or MF?
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, PC/PET GF30 or PC/PET MF?
PC/PET MF. Its machinability rates good (62/100) against fair (45/100) for PC/PET GF30; for welding the order is PC/PET GF30 first (very good, 70/100) then PC/PET MF (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PC/PET GF30 and PC/PET MF 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.