PEEK-Bearing-Grade vs PEEK-CF30
Polymer · grade comparison
PEEK-Bearing-Grade and PEEK-CF30 are both polymer grades. PEEK-CF30 is the stronger of the two: tensile strength 235 MPa (34.1 ksi) against 130 MPa (18.9 ksi) for PEEK-Bearing-Grade, about 81% more. In exchange, PEEK-Bearing-Grade is the more ductile: elongation 2.5% versus 1.7% for PEEK-CF30. PEEK-CF30 is stiffer (24 GPa vs 7.7 GPa). On the shop floor, PEEK-CF30 welds better (fair vs poor).
PEEK-Bearing-GradeChoose it when the part is bent, formed or impact-loaded.
PEEK-CF30Choose it when strength drives the design, or when it will be welded.
PEEK-Bearing-Grade vs PEEK-CF30: 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
Shear Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Compressive Modulus
Flexural Strength
Flexural Modulus
Shear Strength
Fracture Toughness (K_IC)
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Same in both: Poisson's Ratio 0.38
Physical
Density and transition temperatures.
Density
Glass Transition (Tg)
Water Absorption (24 h)
Water Absorption (Saturation)
Same in both: Melting Temperature (Tm) 343°C649 °F
Thermal
How each material carries heat and how hot it can run.
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
Vicat Softening Point (B50)
Same in both: Thermal Conductivity 0.9 W/m·K0.52 BTU/hr·ft·°F · Min Service Temperature -60°C-76 °F · Limiting Oxygen Index 35% · Max Service Temperature (short-term) 310°C590 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Volume Resistivity
Same in both: Surface Resistivity 100,000 Ω
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: UV / Weathering Resistance 70 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Polishability
Melt Flow Rate
Processing Melt Temperature (typ.)
Same in both: Machinability 55 / 100 · Formability (cold) 10 / 100 · Mold Shrinkage 0.3% · Mold Temperature (typ.) 190°C374 °F
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Same in both: Embodied Water 450 L/kg53.9 gal/lb · Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 1
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-Bearing-Grade | PEEK-CF30 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
PEEK-Bearing-Grade vs PEEK-CF30 — frequently asked
Is PEEK-CF30 stronger than PEEK-Bearing-Grade?
Yes. PEEK-CF30 has a typical tensile strength of 235 MPa (34.1 ksi) against 130 MPa (18.9 ksi) for PEEK-Bearing-Grade — about 81% more.
Which is cheaper, PEEK-Bearing-Grade or PEEK-CF30?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which welds better, PEEK-Bearing-Grade or PEEK-CF30?
PEEK-CF30. Its weldability rates fair (35/100) against poor (20/100) for PEEK-Bearing-Grade.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PEEK-Bearing-Grade and PEEK-CF30 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.