PEKK 7000 vs PEKK GF30
Polymer · PEKK grade comparison
PEKK 7000 and PEKK GF30 are two grades of the same polymer grade, PEKK: 7000 (kepstan 7000-type) versus GF30 (30 % glass-fiber reinforced). The chemistry is identical, so every difference below comes from the condition. PEKK 7000 is the stronger of the two: yield strength 100 MPa (14.5 ksi) against 95 MPa (13.8 ksi) for PEKK GF30, about 5% more. PEKK 7000 is the more ductile: elongation 15% versus 2.5% for PEKK GF30. PEKK 7000 is lighter (1.3 g/cm³ vs 1.53 g/cm³ for PEKK GF30) and PEKK GF30 is stiffer (11 GPa vs 3.9 GPa). On the shop floor, PEKK 7000 machines more easily (good vs fair) and PEKK GF30 welds better (good vs fair).
PEKK 7000Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
PEKK GF30Choose it when it will be welded.
PEKK 7000 vs PEKK GF30: 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)
Yield Strength (0.2% offset)
Elongation at Break
Flexural Strength
Flexural Modulus
Izod Impact, Notched
Same in both: Shear Modulus 1.4 GPa0.2 Msi · Bulk Modulus 7 GPa0.94 Msi · Poisson's Ratio 0.4 · Compressive Strength 130 MPa18.9 ksi · Compressive Modulus 3.5 GPa0.51 Msi · Shear Strength 65 MPa9.4 ksi · Fracture Toughness (K_IC) 3.5 MPa·√m3.2 ksi·√in · Hardness, Shore D 86 Shore D · Hardness, Rockwell M 100 HRM
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Same in both: Melting Temperature (Tm) 332°C630 °F · Water Absorption (24 h) 0.15% · Water Absorption (Saturation) 0.5%
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. @ 1.8 MPa
Same in both: Specific Heat Capacity 1,050 J/kg·K0.25 BTU/lb·°F · Min Service Temperature -60°C-76 °F · Heat Deflection Temp. @ 0.45 MPa 175°C347 °F · Limiting Oxygen Index 40% · Max Service Temperature (short-term) 300°C572 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹⁴ Ω·m3.94×10²¹ µΩ·in · Dielectric Strength 22 kV/mm559 V/mil · Dielectric Constant (1 MHz) 3.3 · Dissipation Factor (1 MHz) 0.004 · 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 45 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Mold Shrinkage
Same in both: Polishability 60 / 100 · Processing Melt Temperature (typ.) 380°C716 °F · Mold Temperature (typ.) 200°C392 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 330 MJ/kg141,875 BTU/lb · Embodied Carbon (primary production) 18 kg CO₂/kg · Embodied Water 500 L/kg59.9 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.
PEKK 7000 vs PEKK GF30 — frequently asked
Is PEKK 7000 stronger than PEKK GF30?
Yes. PEKK 7000 has a typical yield strength of 100 MPa (14.5 ksi) against 95 MPa (13.8 ksi) for PEKK GF30 — about 5% more. Tensile strength is 100 MPa (14.5 ksi) vs 160 MPa (23.2 ksi).
Which grade does FabDigit quote by default, 7000 or GF30?
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, PEKK 7000 or PEKK GF30?
PEKK 7000. Its machinability rates good (68/100) against fair (45/100) for PEKK GF30; for welding the order is PEKK GF30 first (good, 55/100) then PEKK 7000 (fair, 42/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PEKK 7000 and PEKK GF30 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.