Sumikasuper CF30 vs Sumikasuper GF40
Polymer · Sumikasuper grade comparison
Sumikasuper CF30 and Sumikasuper GF40 are two grades of the same polymer grade, Sumikasuper: CF30 (30% carbon-fiber reinforced) versus GF40 (40% glass-fiber reinforced). The chemistry is identical, so every difference below comes from the condition. Sumikasuper CF30 is the stronger of the two: tensile strength 200 MPa (29 ksi) against 175 MPa (25.4 ksi) for Sumikasuper GF40, about 14% more. In exchange, Sumikasuper GF40 is the more ductile: elongation 1.8% versus 1.4% for Sumikasuper CF30. Sumikasuper CF30 is lighter (1.48 g/cm³ vs 1.72 g/cm³ for Sumikasuper GF40) and Sumikasuper CF30 is stiffer (25 GPa vs 17 GPa).
Sumikasuper CF30Choose it when strength drives the design, or when weight is the constraint.
Sumikasuper GF40Choose it when the part is bent, formed or impact-loaded.
Sumikasuper CF30 vs Sumikasuper 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.
Sumikasuper CF30Sumikasuper GF40
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 0.35 · Compressive Strength 120 MPa17.4 ksi · Hardness, Shore D 88 Shore D · Hardness, Rockwell M 90 HRM
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 335°C635 °F · Glass Transition (Tg) 120°C248 °F · Water Absorption (24 h) 0.02% · Water Absorption (Saturation) 0.05%
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Heat Deflection Temp. @ 1.8 MPa
Same in both: Specific Heat Capacity 1,100 J/kg·K0.26 BTU/lb·°F · Max Service Temperature (continuous) 220°C428 °F · Min Service Temperature -50°C-58 °F · Heat Deflection Temp. @ 0.45 MPa 290°C554 °F · Limiting Oxygen Index 40% · Max Service Temperature (short-term) 300°C572 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Dielectric Strength 40 kV/mm1,016 V/mil · Dielectric Constant (1 MHz) 3.9 · Dissipation Factor (1 MHz) 0.003 · Volume Resistivity 1×10¹⁵ Ω·cm · Surface Resistivity 1×10¹⁵ Ω · Comparative Tracking Index (CTI) 200 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 90 / 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) 20 / 100 · Polishability 40 / 100 · Melt Flow Rate 25 g/10 min · Processing Melt Temperature (typ.) 350°C662 °F · Mold Temperature (typ.) 110°C230 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 160 MJ/kg68,788 BTU/lb · Embodied Carbon (primary production) 8.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 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.
Sumikasuper CF30 vs Sumikasuper GF40 — frequently asked
Is Sumikasuper CF30 stronger than Sumikasuper GF40?
Yes. Sumikasuper CF30 has a typical tensile strength of 200 MPa (29 ksi) against 175 MPa (25.4 ksi) for Sumikasuper GF40 — about 14% more.
Which grade does FabDigit quote by default, CF30 or GF40?
GF30 is the default Sumikasuper condition in the FabDigit quote flow (neither CF30 nor GF40). 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.
When should I choose Sumikasuper CF30 over Sumikasuper GF40?
Pick Sumikasuper CF30 when strength drives the design, or when weight is the constraint. Pick Sumikasuper GF40 when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Sumikasuper CF30 and Sumikasuper 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.