PEEK-CF30 vs PEEK-Medical-Grade
Polymer · grade comparison
PEEK-CF30 and PEEK-Medical-Grade are both polymer grades. PEEK-CF30 is the stronger of the two: tensile strength 235 MPa (34.1 ksi) against 100 MPa (14.5 ksi) for PEEK-Medical-Grade, about 135% more. In exchange, PEEK-Medical-Grade is the more ductile: elongation 30% versus 1.7% for PEEK-CF30. PEEK-Medical-Grade is lighter (1.3 g/cm³ vs 1.41 g/cm³ for PEEK-CF30) and PEEK-CF30 is stiffer (24 GPa vs 3.8 GPa). On the shop floor, PEEK-Medical-Grade machines more easily (very good vs good) and PEEK-Medical-Grade welds better (good vs fair).
PEEK-CF30Choose it when strength drives the design.
PEEK-Medical-GradeChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
PEEK-CF30 vs PEEK-Medical-Grade: 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
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Shear Modulus
Bulk Modulus
Yield Strength (0.2% offset)
Fracture Toughness (K_IC)
Hardness, Rockwell R
Physical
Density and transition temperatures.
Density
Water Absorption (24 h)
Water Absorption (Saturation)
Same in both: Melting Temperature (Tm) 343°C649 °F · Glass Transition (Tg) 143°C289 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Max Service Temperature (short-term)
Vicat Softening Point (B50)
Same in both: Min Service Temperature -60°C-76 °F · Limiting Oxygen Index 35%
Electrical
Conductivity and insulation.
Electrical Resistivity
Volume Resistivity
Surface Resistivity
Dielectric Strength
Dielectric Constant (1 MHz)
Dissipation Factor (1 MHz)
Comparative Tracking Index (CTI)
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
UV / Weathering Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Polishability
Mold Shrinkage
Melt Flow Rate
Processing Melt Temperature (typ.)
Same in both: Mold Temperature (typ.) 190°C374 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | PEEK-CF30 | PEEK-Medical-Grade |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
PEEK-CF30 vs PEEK-Medical-Grade — frequently asked
Is PEEK-CF30 stronger than PEEK-Medical-Grade?
Yes. PEEK-CF30 has a typical tensile strength of 235 MPa (34.1 ksi) against 100 MPa (14.5 ksi) for PEEK-Medical-Grade — about 135% more.
Which is cheaper, PEEK-CF30 or PEEK-Medical-Grade?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, PEEK-CF30 or PEEK-Medical-Grade?
PEEK-Medical-Grade. Its machinability rates very good (70/100) against good (55/100) for PEEK-CF30; for welding the order is PEEK-Medical-Grade first (good, 60/100) then PEEK-CF30 (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in PEEK-CF30 and PEEK-Medical-Grade 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.