PEEK-GF30 HF
Grade
HF = high-flow / low-viscosity GF30 grade for thin walls and long flow paths
Pick the high-flow, low-viscosity variant when thin-wall connectors and small precision parts are hard to fill; flow improves but impact and weld-line strength are slightly lower.
Values for the HF condition
Other PEEK-GF30 grades and fills
PEEK-GF30 is listed in 4 conditions; see the grade overview at PEEK-GF30.
Compare all 4 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
GF30 + PTFE/graphite lubricated bearing compound | Choose the PTFE/graphite-lubricated compound for plain bearings, seal rings and wear bushings needing low friction and wear rate; tensile falls to 125 MPa and service temperature to 250 °C. | — | 125 | 2 | 85 Shore D |
HFThis page High-flow / low-viscosity GF30 grade for thin walls and long flow paths | Pick the high-flow, low-viscosity variant when thin-wall connectors and small precision parts are hard to fill; flow improves but impact and weld-line strength are slightly lower. | — | 155 | 2 | 87 Shore D |
Black / heat- and UV-stabilised GF30 pigmented compound | Pick the carbon-black pigmented, heat- and UV-stabilised compound for outdoor, engine-bay or light-blocking parts where appearance must stay consistent; carbon black improves UV resistance. | — | 160 | 2.4 | 88 Shore D |
IMDefault Standard injection-moulding grade | Default choice: use the general-purpose injection-moulding grade for stiff, heat-resistant structural parts and pump/valve components serving continuously to 260 °C. | — | 165 | 2.5 | 88 Shore D |
What is PEEK-GF30 HF?
PEEK-GF30 HF is PEEK-GF30 in the HF grade — pick the high-flow, low-viscosity variant when thin-wall connectors and small precision parts are hard to fill; flow improves but impact and weld-line strength are slightly lower. PEEK-GF30 HF has a tensile strength of 155 MPa (22.5 ksi), stronger than 96% of polymer grades. Elongation at break is 2% and the elastic modulus is 9.5 GPa (1.38 Msi). PEEK-GF30 HF has a density of 1.51 g/cm³ (0.0546 lb/in³), heavier than 88% of polymer grades. Its glass-transition temperature is 143°C (289 °F). IM is the default condition FabDigit quotes; HF is available on request or by drawing note.
Advantages
- High service temperature — 260°C (500 °F), better than 97% of polymer grades
- Tough — resists crack growth — 4.5 MPa·√m (4.1 ksi·√in), better than 96% of polymer grades
- Conducts heat well — 0.43 W/m·K (0.248 BTU/hr·ft·°F), better than 96% of polymer grades
- Good corrosion resistance — 93/100, better than 95% of polymer grades
- Stiff — 9.5 GPa (1.38 Msi), better than 94% of polymer grades
Limitations
- Limited ductility — 2%, worse than 95% of polymer grades
- High embodied carbon — 13 kg CO₂/kg, worse than 93% of polymer grades
- Heavy — 1.51 g/cm³ (0.0546 lb/in³), worse than 88% of polymer grades
- Limited formability — 10/100, worse than 87% of polymer grades
- Hard to polish — 30/100, worse than 82% of polymer grades
PEEK-GF30 HF properties
Typical room-temperature values for PEEK-GF30 HF; 25 are specific to this condition. Other listed values are PEEK-GF30 reference data and may not represent this condition. Bars are the position among polymer grades.
Physical5
PEEK-GF30 HF has a density of 1.51 g/cm³ (0.0546 lb/in³), heavier than 88% of polymer grades. Its glass-transition temperature is 143°C (289 °F).
Mechanical14
PEEK-GF30 HF has a tensile strength of 155 MPa (22.5 ksi), stronger than 96% of polymer grades. Elongation at break is 2% and the elastic modulus is 9.5 GPa (1.38 Msi).
Thermal11
PEEK-GF30 HF is rated for continuous service to 260°C (500 °F). It conducts heat at 0.43 W/m·K (0.248 BTU/hr·ft·°F), better than 96% of polymer grades. Thermal expansion is 20 µm/m·K (11.1 µin/in·°F).
Electrical7
PEEK-GF30 HF is an electrical insulator with a dielectric strength of 19 kV/mm (482.6 V/mil) and a resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (93/100), better than 95% of polymer grades. UV resistance is fair.
Sustainability4
Producing a kilogram of PEEK-GF30 HF takes about 260 MJ of energy and emits 13 kg of CO₂ — more than 94% of polymer grades. Typical recycled content is 0%.
Manufacturability8
PEEK-GF30 HF's machinability is fair (45/100, worse than 78% of polymer grades); weldability fair (40/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with PEEK-GF30 HF
Is PEEK-GF30 easy to machine?
Turns, mills and drills dry, but the glass fiber is highly abrasive — use PCD or coated carbide tooling with sharp rake angles, high speed and low feed. Internal stress causes post-machining distortion; annealing at 200 °C is recommended.
Can PEEK-GF30 be welded?
Not solvent bondable. Ultrasonic, infrared, laser and hot-plate welding are possible, but knit lines and welds are markedly weaker than the base material because of fiber orientation, so use threaded fasteners or inserts for load-bearing joints.
Can PEEK-GF30 be formed, bent or molded?
Injection mould with a barrel around 380 °C and a tool at 180–200 °C to develop crystallinity. Dry at least 3 h at 150 °C to below 0.02% moisture, use large gates and runners to limit fiber breakage, and compensate anisotropic shrinkage in the tool.
What surface finishes work on PEEK-GF30?
Natural colour is light brown to grey-white, and the surface is rough where glass fiber is exposed. Blasting and plasma treatment improve coating adhesion; direct plating is not possible and polishing gives limited improvement.
PEEK-GF30 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| glass fiberchopped E-glass, usually silane-coupling-agent sized | 28 – 32 | 30 |
| pigment / process additivescolorant, nucleating or release additives (grade-dependent) | 0 – 1 | 0.3 |
| polyetheretherketone (PEEK) resinsemi-crystalline aromatic polyaryletherketone matrix | ≥ 68 (balance) | — |
PEEK-GF30 HF — frequently asked
What is PEEK-GF30 HF used for?
PEEK-GF30 HF is typically used for structural aerospace brackets, semiconductor process components, precision gears and electrical insulators under load. In short: stiffest common PEEK grade; 260 °C structural polymer; abrasive to tooling.
What is the tensile strength of PEEK-GF30 HF?
PEEK-GF30 HF has a typical tensile strength of 155 MPa (22.5 ksi) — stronger than 96% of polymer grades. Strength varies by condition: see the 4 listed tempers.
Is PEEK-GF30 HF easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 78% of polymer grades). Turns, mills and drills dry, but the glass fiber is highly abrasive — use PCD or coated carbide tooling with sharp rake angles, high speed and low feed. Internal stress causes post-machining distortion; annealing at 200 °C is recommended.
Can PEEK-GF30 HF be welded?
With care — weldability is rated fair (40/100). Not solvent bondable. Ultrasonic, infrared, laser and hot-plate welding are possible, but knit lines and welds are markedly weaker than the base material because of fiber orientation, so use threaded fasteners or inserts for load-bearing joints.
What surface finishes work on PEEK-GF30 HF?
Natural colour is light brown to grey-white, and the surface is rough where glass fiber is exposed. Blasting and plasma treatment improve coating adhesion; direct plating is not possible and polishing gives limited improvement.
Can PEEK-GF30 HF be formed, bent or molded?
Injection mould with a barrel around 380 °C and a tool at 180–200 °C to develop crystallinity. Dry at least 3 h at 150 °C to below 0.02% moisture, use large gates and runners to limit fiber breakage, and compensate anisotropic shrinkage in the tool.
What is the maximum service temperature of PEEK-GF30 HF?
PEEK-GF30 HF is rated for continuous use to about 260°C (500 °F), and briefly to 310°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- VICTREX PEEK 450GL30 Product Data Sheet — Victrex plc (2023)
- TECAPEEK GF30 natural — stock shape datasheet — Ensinger GmbH (2023)
- CAMPUS plastics database — PEEK GF30 injection moulding grades (ISO 10350) — CWFG / CAMPUS (2024)
- ISO 527-2 / ISO 178 / ISO 75-1 test methods for rigid plastics — ISO (2019)
- Engineered Materials Handbook Vol. 2: Engineering Plastics — ASM International (1988)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.