PEEK-CF30 HF vs PEEK-CF30 ST
Polymer · PEEK-CF30 grade comparison
PEEK-CF30 HF and PEEK-CF30 ST are two grades of the same polymer grade, PEEK-CF30: HF (high-flow / low-viscosity CF30 injection grade) versus ST (solution annealed). The chemistry is identical, so every difference below comes from the condition. PEEK-CF30 HF is the stronger of the two: tensile strength 215 MPa (31.2 ksi) against 145 MPa (21 ksi) for PEEK-CF30 ST, about 48% more. In exchange, PEEK-CF30 ST is the more ductile: elongation 2.5% versus 1.5% for PEEK-CF30 HF. PEEK-CF30 HF is stiffer (22 GPa vs 14 GPa).
PEEK-CF30 HFChoose it when strength drives the design.
PEEK-CF30 STChoose it when the part is bent, formed or impact-loaded.
PEEK-CF30 HF vs PEEK-CF30 ST: 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
Compressive Strength
Flexural Strength
Flexural Modulus
Shear Strength
Izod Impact, Notched
Hardness, Shore D
Hardness, Rockwell M
Same in both: Poisson's Ratio 0.38 · Compressive Modulus 16 GPa2.3 Msi
Physical
Density and transition temperatures.
Same in both: Density 1.41 g/cm³0.05 lb/in³ · Melting Temperature (Tm) 343°C649 °F · Glass Transition (Tg) 143°C289 °F · Water Absorption (24 h) 0.08% · Water Absorption (Saturation) 0.3%
Thermal
How each material carries heat and how hot it can run.
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Same in both: Thermal Conductivity 0.9 W/m·K0.52 BTU/hr·ft·°F · Specific Heat Capacity 1,050 J/kg·K0.25 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 µin/in·°F · Max Service Temperature (continuous) 260°C500 °F · Min Service Temperature -60°C-76 °F · Limiting Oxygen Index 35% · Max Service Temperature (short-term) 310°C590 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 100 Ω·m3.94×10⁹ µΩ·in · Volume Resistivity 10,000 Ω·cm · Surface Resistivity 100,000 Ω
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 92 / 100 · UV / Weathering Resistance 70 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Melt Flow Rate
Same in both: Formability (cold) 10 / 100 · Polishability 40 / 100 · Mold Shrinkage 0.3% · Processing Melt Temperature (typ.) 385°C725 °F · Mold Temperature (typ.) 190°C374 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 320 MJ/kg137,575 BTU/lb · Embodied Carbon (primary production) 18 kg CO₂/kg · Embodied Water 450 L/kg53.9 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.
PEEK-CF30 HF vs PEEK-CF30 ST — frequently asked
Is PEEK-CF30 HF stronger than PEEK-CF30 ST?
Yes. PEEK-CF30 HF has a typical tensile strength of 215 MPa (31.2 ksi) against 145 MPa (21 ksi) for PEEK-CF30 ST — about 48% more.
Which grade does FabDigit quote by default, HF or ST?
IM is the default PEEK-CF30 condition in the FabDigit quote flow (neither HF nor ST). 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 PEEK-CF30 HF over PEEK-CF30 ST?
Pick PEEK-CF30 HF when strength drives the design. Pick PEEK-CF30 ST when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PEEK-CF30 HF and PEEK-CF30 ST 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.