# Are carbon fiber filaments worth it, and do I need a hardened nozzle?

Carbon-fiber and glass-fiber filaments are stiffer and usually matte, and they are not automatically stronger. They are abrasive, so print them with a hardened steel nozzle. Brass wears quickly.

## When to use which material

Pick [PLA-CF](/material/pla) when you want a matte, stiffer PLA and you already own a hardened nozzle. The PLA-CF rows live in the PLA material because that is how they are filed. Pick [PETG-CF](/material/petg) for a stiffer PETG. Pick [PA-CF](/material/pa-cf) when the part is a nylon structure and you have read the [nylon guide](/answers/nylon). Glass-fiber grades follow the same nozzle rule. The consensus treats GF with CF.

## Temperatures and settings

PLA-CF rows here list 190–230 °C and a 50–70 °C bed. Bambu PETG-CF lists 220–250 °C and 70–90 °C. Bambu PA6-CF lists 250–290 °C and 80–100 °C. The hardened nozzle is the setting that is not optional. Brass wears quickly. A 0.4 mm brass tip is the wrong consumable for these spools.

## Failure modes

A brass nozzle opens up and the extrusion looks randomly over-sized. A brittle CF grade snaps in a feeder. The [AMS guide](/answers/ams) says to avoid very brittle CF in the AMS. A part that needed strength and got only stiffness will still break. That is the “not always stronger” caveat, and this site has no tensile column to paper over it.

## Caveats

Do not rank a spool as carbon fiber because the name says CF. Polymaker PLA CF in this import is not tagged with carbon-fiber variants and is not flagged for a hardened nozzle. PolyLite PLA-CF is the row that is. The compare [Bambu PLA-CF versus Polymaker PLA CF](/compare/bambu-lab-pla-cf-vs-polymaker-pla-cf) uses that other Polymaker slug. Read the hardened-nozzle cell before trusting the name.

## Where this sits in the catalog

[X1 Carbon](/printer/bambu-lab-x1-carbon) records a hardened nozzle and optional AMS. [P1S](/printer/bambu-lab-p1s) records stainless steel and an AMS, so fiber filament is outside that nozzle. [K1C](/printer/creality-k1c) and [Centauri Carbon](/printer/elegoo-centauri-carbon) record hardened nozzles. [PA6-CF on the X1 Carbon](/printer/bambu-lab-x1-carbon/bambu-lab/pa6-cf) is the settings page for the structural row. The [strength guide](/answers/strength) already leads with PA6-CF for a different question.

Updated 2026-10-14. Sources accessed 2026-10-14. Use case: Carbon fiber.

## Ranked filaments

| Rank | Filament | Nozzle | Bed | Price per kg |
| --- | --- | --- | --- | --- |
| 1 | Bambu Lab PLA-CF | 190–230 °C | 50–70 °C | — |
| 2 | Polymaker Polylite PLA CF | 190–230 °C | 50–70 °C | — |
| 3 | Bambu Lab PETG-CF | 220–250 °C | 70–90 °C | — |
| 4 | Bambu Lab PA6-CF | 250–290 °C | 80–100 °C | — |

## What the community says

The consensus is that carbon-fiber and glass-fiber filaments are stiffer and matte but not always stronger, and that they are abrasive so they need a hardened nozzle. The materials named are PETG-CF, PA-CF, and PLA-CF, plus a hardened steel nozzle. The caveat is that brass wears quickly.

## Sources

- [Bambu PLA-CF technical data sheet](https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_PLA-CF_Technical_Data_Sheet_V3.pdf) (datasheet)
- [PolyLite PLA-CF technical data sheet](https://cdn.shopify.com/s/files/1/0548/7299/7945/files/PolyLite_PLA-CF_TDS_EN_V5.4.pdf) (datasheet)
- [Bambu PETG-CF technical data sheet](https://cdn.shopify.com/s/files/1/0584/7236/6216/files/Bambu_PETG-CF_Technical_Data_Sheet_V2.pdf) (datasheet)
- [Bambu PA6-CF technical data sheet](https://cdn.shopify.com/s/files/1/0651/1555/4032/files/Bambu_PA6-CF_Technical_Data_Sheet-v2.pdf) (datasheet)
- [Community source, r/3Dprinting vhumtv](https://www.reddit.com/r/3Dprinting/comments/vhumtv/) (reddit)
- [Community source, r/BambuLab 1x36qhb](https://www.reddit.com/r/BambuLab/comments/1x36qhb/) (reddit)
- [Community source, r/3Dprinting 1wvf0h4](https://www.reddit.com/r/3Dprinting/comments/1wvf0h4/) (reddit)
- [Community source, r/3Dprinting uvcohe](https://www.reddit.com/r/3Dprinting/comments/uvcohe/) (reddit)
- [Community source, r/3Dprinting sivlq6](https://www.reddit.com/r/3Dprinting/comments/sivlq6/) (reddit)

HTML: https://filamentfacts.com/answers/cf