Material library / Composite
PETG-CF
Carbon fiber reinforced for lightweight structural parts.
70 MPa
Tensile Strength
8.4 GPa
Flexural Modulus
75 °C
Heat Deflection Temp
0.15–0.3 mm
Layer Resolution
1.31 g/cm³
Density
PETG-CF is PETG infused with chopped carbon fibre strands. The carbon fibre reinforcement dramatically increases stiffness and dimensional stability while keeping weight low. This makes it an excellent choice for structural brackets, jigs, and any part where deflection under load is unacceptable.
Advantages
- Very high stiffness-to-weight ratio
- Excellent dimensional stability - minimal creep under sustained load
- Electrically conductive (slightly)
- Attractive matte dark surface finish
Limitations
- Abrasive - requires hardened steel or ruby nozzle
- Limited to black or very dark colours
Applications
Printing tips
PETG-CF requires a hardened steel nozzle (minimum 0.4 mm, preferably 0.6 mm). Print at 240–250 °C with a bed at 70–85 °C. Do not use brass nozzles - the carbon fibres will wear through them within hours.
PETG-CF FAQ
- Is PETG-CF stronger than standard PETG?
- PETG-CF is significantly stiffer (4× higher flexural modulus) than standard PETG. However, it has lower elongation at break - it is more rigid but less tough (more likely to snap under sudden impact vs bend).
Related materials
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