PEEK
☀ UV Stable
⬡ Chemical Resistant
430–470
°C
Print Temp
120–160
°C
Bed Temp
250
°C
Max Service
Overview
Polyether Ether Ketone — the apex of FDM engineering filaments. Biocompatible, chemically inert to almost all solvents, service temperature up to 250°C, and mechanical properties approaching machined aluminium. Requires a dedicated high-temperature printer (450°C+ hotend, 120°C+ bed, heated chamber). Reserved for aerospace, medical, and extreme-environment applications.
Properties
Difficulty
expert
Flexibility
rigid
Layer Adhesion
good
Enclosure
required
Heated Bed
required
Dry Storage
recommended
Pros
- Exceptional mechanical properties approaching aluminium
- Service temp 250°C+
- Chemically inert to almost all solvents and acids
- Biocompatible — implant-grade available
- Flame retardant
- Radiation resistant
- Excellent fatigue resistance
Cons
- Requires 450°C+ hotend — only dedicated machines
- Needs 120°C+ bed and 120°C+ chamber
- Extremely expensive (€200-500/kg)
- Very slow print speeds
- Difficult to dial in
- Limited printer compatibility (Apium, AON, Roboze)
Best For
- Aerospace structural components|Implantable medical devices|Chemical processing equipment|High-temperature jigs and fixtures|Semiconductor handling|Oil and gas downhole tools
Avoid For
- Any standard consumer printer|Cost-sensitive projects|Any application where PA-CF or PC would suffice
Storage
Low moisture absorption but store sealed regardless. Dry at 150°C for 3-4h before printing. Very long shelf life when sealed.
Brands
Apium PEEKVictrex PEEKSolvay KetaSpireFilament2Print PEEK3DXTECH PEEK