PC-Si GF10 vs PC-Si GF20
Polymer · PC-Si grade comparison
PC-Si GF10 and PC-Si GF20 are two grades of the same polymer grade, PC-Si: GF10 (10% glass-fiber reinforced PC-Si) versus GF20 (20% glass-fiber reinforced PC-Si). The chemistry is identical, so every difference below comes from the condition. PC-Si GF20 is the stronger of the two: tensile strength 95 MPa (13.8 ksi) against 78 MPa (11.3 ksi) for PC-Si GF10, about 22% more. In exchange, PC-Si GF10 is the more ductile: elongation 8% versus 5% for PC-Si GF20. PC-Si GF10 is lighter (1.26 g/cm³ vs 1.34 g/cm³ for PC-Si GF20) and PC-Si GF20 is stiffer (5.2 GPa vs 3.6 GPa).
PC-Si GF10Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PC-Si GF20Choose it when strength drives the design.
PC-Si GF10 vs PC-Si GF20: 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 0.8 GPa0.12 Msi · Bulk Modulus 3 GPa0.49 Msi · Poisson's Ratio 0.38 · Yield Strength (0.2% offset) 58 MPa8.4 ksi · Compressive Strength 72 MPa10.4 ksi · Compressive Modulus 2.1 GPa0.3 Msi · Shear Strength 40 MPa5.8 ksi · Hardness, Shore D 80 Shore D · Hardness, Rockwell M 68 HRM · Hardness, Rockwell R 118 HRR
Physical
Density and transition temperatures.
Density
Same in both: Glass Transition (Tg) 143°C289 °F · Water Absorption (24 h) 0.15% · Water Absorption (Saturation) 0.35% · Refractive Index 1.585
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Heat Deflection Temp. @ 1.8 MPa
Same in both: Thermal Conductivity 0.2 W/m·K0.12 BTU/hr·ft·°F · Specific Heat Capacity 1,200 J/kg·K0.29 BTU/lb·°F · Max Service Temperature (continuous) 115°C239 °F · Min Service Temperature -60°C-76 °F · Heat Deflection Temp. @ 0.45 MPa 132°C270 °F · Vicat Softening Point (B50) 142°C288 °F · Limiting Oxygen Index 32% · Max Service Temperature (short-term) 145°C293 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Dielectric Strength 25 kV/mm635 V/mil · Dielectric Constant (1 MHz) 2.9 · Dissipation Factor (1 MHz) 0.01 · Volume Resistivity 1×10¹⁶ Ω·cm · Surface Resistivity 1×10¹⁵ Ω · Comparative Tracking Index (CTI) 250 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 75 / 100 · UV / Weathering Resistance 40 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Mold Shrinkage
Same in both: Weldability 70 / 100 · Formability (cold) 60 / 100 · Polishability 80 / 100 · Melt Flow Rate 8 g/10 min · Processing Melt Temperature (typ.) 290°C554 °F · Mold Temperature (typ.) 90°C194 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 112 MJ/kg48,151 BTU/lb · Embodied Carbon (primary production) 7.8 kg CO₂/kg · Embodied Water 250 L/kg30 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.
PC-Si GF10 vs PC-Si GF20 — frequently asked
Is PC-Si GF20 stronger than PC-Si GF10?
Yes. PC-Si GF20 has a typical tensile strength of 95 MPa (13.8 ksi) against 78 MPa (11.3 ksi) for PC-Si GF10 — about 22% more.
Which grade does FabDigit quote by default, GF10 or GF20?
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-Si GF10 or PC-Si GF20?
PC-Si GF10. Its machinability rates good (55/100) against fair (50/100) for PC-Si GF20.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PC-Si GF10 and PC-Si GF20 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.