3D Printer Filament Elegoo PETG-CF (grey) - Elegoo

Elegoo PETG-CF (grey) is a carbon-fiber–filled PETG filament formulated for FDM/FFF 3D printers. Combining the toughness and chemical resistance of PETG with chopped carbon fibers, this grey filament increases part stiffness and heat deflection compared with standard PETG. It is intended for functional parts, mechanical components and prototypes that require improved dimensional stability and higher rigidity while maintaining relative ease of printing characteristic of PETG materials.

Advantages

The carbon-fiber reinforcement delivers higher tensile modulus and improved stiffness, helping printed parts resist bending and creep under load. PETG base material provides good layer adhesion, chemical resistance and low warping, which simplifies printing larger or more complex shapes. The grey color provides a neutral, technical appearance suitable for visible functional parts and rapid prototyping. Overall, this filament offers a balance of mechanical performance and practical printability for workshop and engineering applications.

Suitable for

• Functional prototypes and engineering models with increased stiffness requirements
• Durable mechanical components such as brackets, housings and fixtures
• Parts exposed to moderate temperatures where improved heat deflection is beneficial
• Applications requiring a neutral grey finish for visible technical parts

When it may not be suitable

Because this filament contains chopped carbon fibers, it is more abrasive than unfilled PETG and can accelerate nozzle wear; users should avoid using it with soft brass nozzles over extended periods. Surface finish may show a slightly textured or matte look and is not ideal when a highly glossy, decorative appearance is required. Extremely flexible or elastomeric parts are not appropriate for this stiff, fiber-filled formulation.

Key specifications

• Material type: PETG with chopped carbon-fiber reinforcement
• Colour: Grey
• Designed use: FDM/FFF 3D printing for functional parts and prototypes
• Mechanical properties: Increased stiffness and tensile modulus compared with standard PETG
• Thermal behaviour: Improved heat deflection temperature relative to unfilled PETG
• Printability: Low warping and good layer adhesion typical of PETG base polymers

How to use

Load the Elegoo PETG-CF filament into a printer configured for PETG-type materials. Use a hardened or wear-resistant nozzle to reduce abrasion from carbon fibers; recommended nozzle diameter is typically 0.4 mm or larger depending on required detail. Set print temperatures in the range suitable for PETG and adjust as needed for layer adhesion and flow—start with manufacturer-recommended PETG settings and fine-tune. Use a heated bed and adhesion aids as typical for PETG to minimise warping. Print speeds may be reduced relative to unfilled PETG to improve surface quality and dimensional accuracy.

What to consider before purchase

• Requires a hardened or wear-resistant nozzle due to abrasive carbon fibers
• Not recommended for parts that require high surface gloss or elastic flexibility
• Ensure your printer supports PETG-type filaments and can reach appropriate extrusion and bed temperatures
• Storage: keep filament dry and protected from moisture to preserve printability

Usage recommendations

For best results, use a hardened steel or ruby nozzle, print with a slightly higher extrusion temperature and lower speed than standard PETG, and enable adequate part cooling only if necessary to avoid compromising interlayer adhesion. Dry filament before printing if it has been exposed to humid conditions.