A semi-crystalline high-performance polymer for parts that see 200 °C+ service, aggressive chemistry or continuous wear. We machine unfilled, glass-filled and carbon-filled PEEK to ±0.02 mm, with stress-relief annealing before final finishing.
Indicative figures for a 450G-type unfilled grade. Filled grades change stiffness, CTE and wear by 30–100 %, so confirm the exact compound before you freeze the design.
| Property | Value | Why it matters for machining |
|---|---|---|
| Glass transition / melting point | 143 °C / 343 °C | Annealing above Tg relieves the stress that would otherwise move the part after machining |
| Continuous service temperature | 250 °C | Allows autoclave, hot-air and downhole service without creep |
| Tensile strength | ~100 MPa | Thin walls and fine ribs remain practical down to 0.5 mm |
| Flexural modulus | ~3.6 GPa | Stiffer than PMMA or PC; deflection is rarely the limiting factor |
| Notched impact strength | ~3.5 kJ/m² | Notch-sensitive — specify generous internal radii |
| Coefficient of thermal expansion | ~47 µm/m·K | Over a 100 mm part, a 40 °C swing moves ~0.19 mm; measure at 20 °C |
| Water absorption | 0.15 % / 24 h | Low enough for dimensional stability, high enough to demand drying before annealing |
| Chemical resistance | Outstanding | Unaffected by most solvents, fuels, acids and bases; attacked by concentrated sulphuric acid and some halogens |
| Sterilisation | Steam, gamma, EtO, plasma | Survives 1,000+ autoclave cycles; medical grades available with traceability |
| Flammability | UL 94 V-0 | No flame-retardant additive needed |
| Cost index | 8–12 × PMMA | Material is usually the largest line in the quote — optimise blank size, not just cycle time |
All grades are supplied with lot certificates and are machined in a dedicated high-temperature cell to avoid cross-contamination.
Natural tan, the default for fluidics, seals and insulators. Best elongation and impact of the family; the grade to choose when chemical resistance matters more than stiffness.
Higher stiffness, lower CTE, better creep resistance. Abrasive to tooling and to mating surfaces — expect shorter tool life and allow more finishing stock.
Stiffest grade, electrically conductive, lowest wear rate against steel. Common in semiconductor handling and pump components; not for electrical isolation.
PTFE / graphite / carbon modified compounds for unlubricated bushings, thrust washers and wear pads. Lower friction, lower strength — design for compression, not tension.
ISO 10993-tested resin with full batch traceability for instrument and implant-adjacent parts. Supplied only against a documented material specification.
Rod 6–150 mm, plate 6–80 mm, tube. Near-net blanks reduce both material cost and machining time on large parts — send the 3D model and we will quote both routes.
Wafer handling end effectors, vacuum chucks, retaining rings. Low outgassing, low particle generation and dimensional stability at process temperature.
Pump heads, valve bodies, ferrules and seals that resist solvents and steam cleaning without extractables. Common in analytical instrument flow paths.
Reusable instrument components, dental handpieces and sterilization trays where repeated autoclave cycles rule out PSU and PEI.
Downhole seals, backup rings and electrical connectors exposed to brine, H₂S and 200 °C+ well temperatures.
Bushings, brackets and fluid-system fittings where weight saving over aluminium and chemical resistance to skydrol matter.
Valve seats, pump components and wear parts in CIP/SIP lines — PEEK is approved for repeated caustic and acid cleaning cycles.
If PEEK is over-specified or under-specified for your duty, one of these is usually the answer.
STEP, DWG or PDF — we will come back with grade advice, achievable tolerance and a price for both unfilled and filled options.
