— FDM · MATERIAL
PETG-CF
Carbon-fiber PETG. Engineering stiffness with PETG's ease.
PETG reinforced with chopped carbon-fiber. The pragmatic engineering filament: nearly Nylon-CF stiffness, but prints at PETG temps with PETG's water resistance. Same hardened-nozzle requirement as PLA-CF.
— Specs
The numbers your slicer cares about.
Density
1.31 g/cm³
Nozzle temp
240–260°C
Bed temp
70–85°C
Price
—
— Use cases
When PETG-CF is the right call.
Best for
- Functional engineering parts: brackets, jigs, robotic arms
- Outdoor mounts that need stiffness AND water resistance
- RC frames and drones for higher-spec users
- Replacement parts for tools and machinery
Avoid for
- Brass nozzles (same wear as PLA-CF)
- Decorative work — the matte finish hides detail
- Beginners — fiber-filled extrusion takes a few prints to dial in
- Food contact applications
— Honest assessment
Pros & cons, no marketing.
Pros
- Combines PETG's water/chemical resistance with carbon-fiber stiffness
- Higher heat tolerance than PLA-CF (~75°C continuous)
- Lower warp than vanilla PETG thanks to fiber filling
- Excellent layer adhesion at recommended temps
Cons
- Abrasive — hardened nozzle required
- Stringier than vanilla PETG without retraction tuning
- Premium price — 2× pure PETG per kg
- Brittler than pure PETG (fibers concentrate stress)
— Print tips
What we'd tell a friend printing this.
- 1Hardened steel nozzle (0.4mm or 0.6mm for utility work)
- 2Slightly higher temps than vanilla PETG (+5–10°C compensates for fibers)
- 3Dry 6h at 65°C before printing — fibers absorb humidity readily
- 4Lower retraction than PETG (~3mm) for less stringing
— Compare
Also worth considering.
— Try this material