Cheapest Carbon Fiber Filament Right Now
Live per-kg prices for every CF composite (PLA-CF, PETG-CF, PA-CF, PC-CF, ASA-CF) across the retailers we track. Updated daily.
Last updated: June 2026
Carbon fiber filament is about stiffness and finish, not raw strength. The chopped fibres make a part more rigid, more dimensionally stable, and give it a premium matte-black look, but the base polymer decides whether the part is also tough. PLA-CF is stiff but brittle; PA-CF (nylon) is the genuine engineering choice. Pick by the job, then let the live prices below find the cheapest in-stock option.
Two things to get right before you buy: you need a hardened nozzle, and CF, especially nylon-CF, needs drying.
Carbon fiber filament at a glance
“Carbon fiber filament” isn’t one material. It’s a base polymer (PLA, PETG, nylon, PC, ASA) with ~10-20% chopped carbon fibre mixed in. The fibre adds the stiffness and matte finish; the base polymer sets everything else.
Brass wears out fast. Hardened steel, tungsten-carbide or ruby. Non-negotiable for CF.
More rigid + dimensionally stable + matte finish. NOT automatically stronger.
PA-CF tough; PLA-CF stiff-but-brittle. Fibres can reduce layer adhesion.
PA-CF very hygroscopic; dry 70-80°C/6-12h. PLA-CF/PETG-CF less so.
PLA-CF ~210-230°C, PETG-CF ~240-260°C, PA-CF/PC-CF ~260-300°C.
PLA-CF/PETG-CF open is fine. Nylon and PC composites warp without one.
PLA-CF ~60°C; PETG-CF ~75°C; PA-CF/PC-CF 100°C+.
Hides layer lines well, a big reason people pick CF for cosmetic parts.
The hardened-nozzle rule (read this first)
This is the single most important thing about carbon fiber filament: the chopped fibres are abrasive and will grind a standard brass nozzle wider within a single spool, which quietly wrecks print quality (over-extrusion, blobs, dimensional drift). You need a hardened steel, tungsten-carbide, or ruby-tipped nozzle before you run CF on any meaningful volume.
A 0.4mm hardened nozzle is the default; many people step up to 0.6mm for CF because the larger bore clogs less and the fibre alignment matters less at typical CF use cases. Bambu’s X1C ships with a hardened nozzle; most Prusa, Voron and Ender builds need a $10-20 upgrade. Brass is fine for a single test print, not for ongoing use.
PLA-CF is the entry point: it prints almost like normal PLA (just hotter and through a hardened nozzle), adds noticeable rigidity, and has a premium matte finish that hides layer lines. It’s stiff but brittle, great for cosmetic parts, light brackets, and prototypes where you want a high-end look and stiffness, not impact resistance.
PETG-CF keeps PETG’s toughness and chemical/heat resistance while the fibre kills PETG’s stringing and adds rigidity and a matte surface. It’s the sweet spot for functional parts that don’t need full nylon-grade strength: fixtures, enclosures, mounts that see warmth or sunlight.
This is where CF earns its reputation. Nylon carbon fibre (PA-CF, PA6-CF, PA12-CF) combines nylon’s toughness and heat resistance with carbon’s stiffness. It’s the go-to for drone frames, RC parts, brackets, jigs and end-use mechanical parts. It needs a high-temp hotend (260-300°C), an enclosure, and aggressive drying (70-80°C), but nothing else in this list is as strong.
PC-CF (polycarbonate carbon fibre) is the stiffness-plus-heat king, with 100°C+ service temperature for under-hood and high-load parts, but it’s demanding (high temps, enclosure, dry). ASA-CF adds UV stability for outdoor structural parts that also need rigidity. Both are specialist picks; reach for them when PA-CF isn’t heat- or UV-resistant enough.
Picking CF by what you’re actually printing
The right carbon fiber filament is entirely about the job. Here’s the practical breakdown.
PLA-CF. It’s the cheapest CF, prints easily, and the matte-black finish hides layer lines beautifully. Don’t over-buy here. If the part just needs to look good and be stiff, PLA-CF is perfect and you don’t need nylon’s hassle.
PETG-CF. Tougher than PLA-CF, handles ~75°C, resists chemicals, and the fibre makes plain PETG print cleanly. The default for everyday functional black parts that don’t need nylon-grade strength.
PA-CF / PA6-CF. The genuine strength-and-toughness pick, with high stiffness-to-weight, impact resistance, heat tolerance. Requires a high-temp hotend, enclosure and dry storage, but nothing else here survives real mechanical abuse as well.
PC-CF for heat (100°C+), ASA-CF for UV-stable outdoor structural parts. Specialist materials for demanding hardware, only worth it when PA-CF isn’t enough.
Common carbon fiber pitfalls
The #1 mistake. Brass wears measurably within one CF spool, so prints slowly drift out of spec and over-extrude. Fit a hardened/steel/ruby nozzle first. If your prints got worse mid-spool, check your nozzle bore.
PA-CF soaks up moisture fast and prints terribly wet, with stringing, weak brittle layers, rough surfaces, and most of the strength gone. Dry at 70-80°C for 6-12h and print from a dry box. This single factor explains most “PA-CF is weak” complaints.
Chopped-fibre CF can reduce Z-layer bonding because the fibres interrupt polymer flow between layers. CF adds stiffness, not layer strength. If your part fails by splitting along layers, the answer is a tougher base polymer (PA), not more carbon fibre.
When carbon fiber isn’t the right answer
SpoolHound aggregates carbon fiber filament prices from multiple retailers daily and normalises every listing to cost per kg so you can compare like with like. We don’t test filament; we track what things cost and surface the live cheapest in-stock option per CF type. Prices update every 24 hours; click through to the retailer to confirm the live checkout price.