PA66 CF30 vs PA66 GF15
Polymer · PA66 grade comparison
PA66 CF30 and PA66 GF15 are two grades of the same polymer grade, PA66: CF30 (30 % carbon fiber reinforced) versus GF15 (15 % short glass fiber reinforced). The chemistry is identical, so every difference below comes from the condition. PA66 CF30 is the stronger of the two: tensile strength 240 MPa (34.8 ksi) against 130 MPa (18.9 ksi) for PA66 GF15, about 85% more. In exchange, PA66 GF15 is the more ductile: elongation 5% versus 1.8% for PA66 CF30. PA66 GF15 is lighter (1.24 g/cm³ vs 1.28 g/cm³ for PA66 CF30) and PA66 CF30 is stiffer (22 GPa vs 6 GPa). On the shop floor, PA66 GF15 machines more easily (52 vs 38 out of 100).
PA66 CF30Choose it when strength drives the design, or when the part sees heat.
PA66 GF15Choose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PA66 CF30 vs PA66 GF15: 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 1.1 GPa0.16 Msi · Bulk Modulus 5 GPa0.65 Msi · Poisson's Ratio 0.39 · Yield Strength (0.2% offset) 80 MPa11.6 ksi · Compressive Strength 95 MPa13.8 ksi · Compressive Modulus 2.8 GPa0.41 Msi · Shear Strength 60 MPa8.7 ksi · Fracture Toughness (K_IC) 3 MPa·√m2.7 ksi·√in · Hardness, Shore D 81 Shore D · Hardness, Rockwell M 85 HRM · Hardness, Rockwell R 120 HRR
Physical
Density and transition temperatures.
Density
Water Absorption (24 h)
Same in both: Melting Temperature (Tm) 262°C504 °F · Glass Transition (Tg) 70°C158 °F · Water Absorption (Saturation) 8.5% · Refractive Index 1.53
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 1,670 J/kg·K0.4 BTU/lb·°F · Min Service Temperature -40°C-40 °F · Vicat Softening Point (B50) 200°C392 °F · Limiting Oxygen Index 25% · Max Service Temperature (short-term) 170°C338 °F
Electrical
Conductivity and insulation.
Volume Resistivity
Surface Resistivity
Same in both: Electrical Resistivity 1×10¹² Ω·m3.94×10¹⁹ µΩ·in · Dielectric Strength 22 kV/mm559 V/mil · Dielectric Constant (1 MHz) 3.4 · Dissipation Factor (1 MHz) 0.02 · Comparative Tracking Index (CTI) 600 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 60 / 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 70 / 100 · Formability (cold) 50 / 100 · Polishability 60 / 100 · Melt Flow Rate 30 g/10 min · Processing Melt Temperature (typ.) 290°C554 °F · Mold Temperature (typ.) 80°C176 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 120 MJ/kg51,591 BTU/lb · Embodied Carbon (primary production) 6.7 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
PA66 CF30 vs PA66 GF15 — frequently asked
Is PA66 CF30 stronger than PA66 GF15?
Yes. PA66 CF30 has a typical tensile strength of 240 MPa (34.8 ksi) against 130 MPa (18.9 ksi) for PA66 GF15 — about 85% more.
Which grade does FabDigit quote by default, CF30 or GF15?
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, PA66 CF30 or PA66 GF15?
PA66 GF15, by a small margin. Both rate fair for machinability — 52/100 against 38/100 for PA66 CF30.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PA66 CF30 and PA66 GF15 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.