# What filament should I use for a strong part?

For a strong functional part, use carbon-fiber nylon if the printer can reach the listed nozzle temperature and the nozzle can take an abrasive filament; otherwise use PETG or an impact-modified PLA, and do not pick ordinary PLA for a part that will be hit or heated.

“Strong” without a load, a temperature, or a layer direction is not a material. The ranking assumes a stiff part that has to take a load, indoors unless you also read the heat guide.

Updated 2026-10-14. Sources accessed 2026-10-14. Use case: Strength.

## Ranked filaments

| Rank | Filament | Nozzle | Bed | Price per kg |
| --- | --- | --- | --- | --- |
| 1 | Bambu Lab PA6-CF | 250–290 °C | 80–100 °C | Not listed |
| 2 | Prusament PETG | 240–260 °C | 70–90 °C | Not listed |
| 3 | Polymaker PolyMax PLA | 190–230 °C | 25–60 °C | Not listed |
| 4 | eSUN 3D PLA+ | 190–230 °C | 50–70 °C | Not listed |

## What the community says

Asked how big the jump is, r/3Dprinting describes PLA as fine for light-duty parts, PETG as the more durable everyday material, and TPU as the impact-resistant one that is flexible rather than rigid. Fiber-filled nylon is what people move to when a bracket has to be both stiff and hot, which is a different request from ‘stronger PLA.’

## Sources

- [PETG, Prusa Knowledge Base](https://help.prusa3d.com/article/petg_2059) (manufacturer)
- [PLA, Prusa Knowledge Base](https://help.prusa3d.com/article/pla_2062) (manufacturer)
- [Prusa filament material guide](https://help.prusa3d.com/filament-material-guide) (manufacturer)
- [Bambu Lab 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)
- [Prusament PETG technical data sheet](https://www.prusa3d.com/file/3464616/prusament-petg-technical-data-sheet.pdf) (datasheet)
- [How big is the jump between PLA, PETG, and TPU?, r/3Dprinting](https://www.reddit.com/r/3Dprinting/comments/1vawdav/how_big_of_a_difference_is_the_jump_between_pla/) (reddit)

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