PETG-CF CF10 vs PETG-CF CF20
Polymer · PETG-CF grade comparison
PETG-CF CF10 and PETG-CF CF20 are two grades of the same polymer grade, PETG-CF: CF10 (~5–10 wt% carbon fiber) versus CF20 (~15–20 wt% chopped carbon fiber). The chemistry is identical, so every difference below comes from the condition. PETG-CF CF20 is the stronger of the two: tensile strength 52 MPa (7.54 ksi) against 48 MPa (6.96 ksi) for PETG-CF CF10, about 8% more. In exchange, PETG-CF CF10 is the more ductile: elongation 9% versus 4.5% for PETG-CF CF20. PETG-CF CF20 is stiffer (4.2 GPa vs 3 GPa).
PETG-CF CF10Choose it when the part is bent, formed or impact-loaded.
PETG-CF CF20Choose it when strength drives the design.
PETG-CF CF10 vs PETG-CF CF20: 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: Poisson's Ratio 0.38 · Yield Strength (0.2% offset) 50 MPa7.3 ksi · Compressive Strength 70 MPa10.2 ksi · Compressive Modulus 4 GPa0.58 Msi · Shear Strength 40 MPa5.8 ksi · Hardness, Shore D 80 Shore D · Hardness, Rockwell R 112 HRR
Physical
Density and transition temperatures.
Density
Same in both: Glass Transition (Tg) 79°C174 °F · Water Absorption (24 h) 0.14% · Water Absorption (Saturation) 0.5%
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Same in both: Thermal Conductivity 0.3 W/m·K0.17 BTU/hr·ft·°F · Specific Heat Capacity 1,250 J/kg·K0.3 BTU/lb·°F · Min Service Temperature -40°C-40 °F · Heat Deflection Temp. @ 1.8 MPa 70°C158 °F · Vicat Softening Point (B50) 82°C180 °F · Limiting Oxygen Index 23% · Max Service Temperature (short-term) 85°C185 °F
Electrical
Conductivity and insulation.
Same in both: Volume Resistivity 1×10¹² Ω·cm · Surface Resistivity 1×10¹³ Ω
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 78 / 100 · UV / Weathering Resistance 50 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Weldability 45 / 100 · Formability (cold) 25 / 100 · Polishability 30 / 100 · Mold Shrinkage 0.3% · Melt Flow Rate 12 g/10 min · Processing Melt Temperature (typ.) 250°C482 °F · Mold Temperature (typ.) 78°C172 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 110 MJ/kg47,292 BTU/lb · Embodied Carbon (primary production) 7 kg CO₂/kg · Embodied Water 90 L/kg10.8 gal/lb · Typical Recycled Content 5%
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.
PETG-CF CF10 vs PETG-CF CF20 — frequently asked
Is PETG-CF CF20 stronger than PETG-CF CF10?
Yes. PETG-CF CF20 has a typical tensile strength of 52 MPa (7.54 ksi) against 48 MPa (6.96 ksi) for PETG-CF CF10 — about 8% more.
Which grade does FabDigit quote by default, CF10 or CF20?
CF20 is the default PETG-CF condition in the FabDigit quote flow. 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, PETG-CF CF10 or PETG-CF CF20?
PETG-CF CF10, by a small margin. Both rate good for machinability — 68/100 against 62/100 for PETG-CF CF20.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PETG-CF CF10 and PETG-CF CF20 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.