PPS CF30 vs PPS GF40
Polymer · PPS grade comparison
PPS CF30 and PPS GF40 are two grades of the same polymer grade, PPS: CF30 (30% carbon-fiber reinforced) versus GF40 (40% glass-fiber reinforced). The chemistry is identical, so every difference below comes from the condition. Both yield at about 75 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (30% carbon-fiber reinforced versus 40% glass-fiber reinforced). PPS GF40 is the more ductile: elongation 1.4% versus 1.2% for PPS CF30. PPS CF30 is lighter (1.45 g/cm³ vs 1.65 g/cm³ for PPS GF40) and PPS CF30 is stiffer (22 GPa vs 15 GPa).
PPS CF30Choose it when weight is the constraint.
PPS GF40Choose it when the part is bent, formed or impact-loaded.
PPS CF30 vs PPS 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
Hardness, Rockwell M
Same in both: Shear Modulus 1.4 GPa0.2 Msi · Poisson's Ratio 0.37 · Yield Strength (0.2% offset) 75 MPa10.9 ksi · Compressive Strength 120 MPa17.4 ksi · Compressive Modulus 3.5 GPa0.51 Msi · Shear Strength 65 MPa9.4 ksi · Hardness, Shore D 88 Shore D · Hardness, Rockwell R 123 HRR
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 280°C536 °F · Glass Transition (Tg) 88°C190 °F · Water Absorption (24 h) 0.03% · Water Absorption (Saturation) 0.1%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Same in both: Specific Heat Capacity 1,000 J/kg·K0.24 BTU/lb·°F · Max Service Temperature (continuous) 220°C428 °F · Min Service Temperature -40°C-40 °F · Limiting Oxygen Index 47% · Max Service Temperature (short-term) 260°C500 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Constant (1 MHz)
Same in both: Dielectric Strength 18 kV/mm457 V/mil · Dissipation Factor (1 MHz) 0.0013 · Volume Resistivity 1×10¹⁶ Ω·cm · Surface Resistivity 1×10¹⁵ Ω · Comparative Tracking Index (CTI) 175 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 92 / 100 · UV / Weathering Resistance 35 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Mold Shrinkage
Same in both: Weldability 30 / 100 · Formability (cold) 15 / 100 · Polishability 60 / 100 · Processing Melt Temperature (typ.) 320°C608 °F · Mold Temperature (typ.) 140°C284 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 115 MJ/kg49,441 BTU/lb · Embodied Carbon (primary production) 6.2 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 2%
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.
PPS CF30 vs PPS GF40 — frequently asked
What is the difference between PPS CF30 and PPS GF40?
PPS CF30 and PPS GF40 are two grades of the same polymer grade, PPS: CF30 (30% carbon-fiber reinforced) versus GF40 (40% glass-fiber reinforced). The chemistry is identical, so every difference below comes from the condition. Both yield at about 75 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (30% carbon-fiber reinforced versus 40% glass-fiber reinforced).
Which grade does FabDigit quote by default, CF30 or GF40?
Specify the condition in the material field or the drawing note; FabDigit prices the quote for the state you call out.
When should I choose PPS CF30 over PPS GF40?
Pick PPS CF30 when weight is the constraint. Pick PPS GF40 when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PPS CF30 and PPS 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.