PEEK-CF30 ESD vs PEEK-CF30 ST
Polymer · PEEK-CF30 grade comparison
PEEK-CF30 ESD and PEEK-CF30 ST are two grades of the same polymer grade, PEEK-CF30: ESD (static-dissipative / conductive CF30 compound) versus ST (solution annealed). The chemistry is identical, so every difference below comes from the condition. PEEK-CF30 ESD is the stronger of the two: tensile strength 210 MPa (30.5 ksi) against 145 MPa (21 ksi) for PEEK-CF30 ST, about 45% more. In exchange, PEEK-CF30 ST is the more ductile: elongation 2.5% versus 1.6% for PEEK-CF30 ESD. PEEK-CF30 ESD is stiffer (22 GPa vs 14 GPa).
PEEK-CF30 ESDChoose it when strength drives the design.
PEEK-CF30 STChoose it when the part is bent, formed or impact-loaded.
PEEK-CF30 ESD 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.
Thermal Conductivity
Heat Deflection Temp. @ 0.45 MPa
Heat Deflection Temp. @ 1.8 MPa
Same in both: 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.
Electrical Resistivity
Volume Resistivity
Same in both: 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
Same in both: Weldability 35 / 100 · Formability (cold) 10 / 100 · Polishability 40 / 100 · Mold Shrinkage 0.3% · Melt Flow Rate 3 g/10 min · 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 ESD vs PEEK-CF30 ST — frequently asked
Is PEEK-CF30 ESD stronger than PEEK-CF30 ST?
Yes. PEEK-CF30 ESD has a typical tensile strength of 210 MPa (30.5 ksi) against 145 MPa (21 ksi) for PEEK-CF30 ST — about 45% more.
Which grade does FabDigit quote by default, ESD or ST?
IM is the default PEEK-CF30 condition in the FabDigit quote flow (neither ESD 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.
Which is easier to machine, PEEK-CF30 ESD or PEEK-CF30 ST?
PEEK-CF30 ST. Its machinability rates good (58/100) against fair (50/100) for PEEK-CF30 ESD.
Ready to make it?
Upload a CAD file and FabDigit prices the part in PEEK-CF30 ESD 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.