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Polyamide (PA12) and carbon-fiber-filled polyamide (PA6-CF)

Nylon and Carbon-Fiber Nylon (PA6-CF) Parts

Our toughest, stiffest FDM materials — carbon-fiber grades are commonly rated 150 °C or more at low load.

Nylon is where FDM printing stops being a prototyping process and starts making working parts. Unfilled nylon (we print PA12) is tough, slippery and fatigue-resistant — good for wear surfaces, clips that flex thousands of times and parts that take a beating. Carbon-fiber-filled nylon such as PA6-CF adds stiffness and dimensional stability, and it's the usual choice when a printed part has to stand in for a machined or molded one.

Heat is the big difference. Published heat-deflection temperatures for PA6-CF filaments are commonly 150 °C or higher at low load when dry — far beyond PLA, PETG or ASA. That makes carbon-fiber nylon the right answer for parts near motors, pumps and warm machinery, and for anything in a North Texas vehicle that has to stay put through August.

Nylon has two quirks worth knowing. It absorbs moisture from the air, which makes it tougher but less stiff — datasheet figures are usually for dry material, so a part in a humid space behaves a little softer. And carbon-fiber grades are abrasive and demanding: the filament is dried before printing and runs on hardened hardware. That's why a CF-nylon part costs more than the same part in PETG, and why it's worth it when the part has to work.

Nylon & Carbon-Fiber Nylon in Texas heat

In a closed car in summer

Yes

Outdoors, year-round

Yes (CF grades)

When a part has to survive a closed vehicle in August or sit next to a warm motor in an unconditioned plant, carbon-fiber nylon is the FDM material with real margin.

Where Nylon & Carbon-Fiber Nylon works

  • Jigs, fixtures and end-of-arm tooling
  • Brackets and mounts near motors, pumps and warm machinery
  • Pump, hose and fluid-handling adapters that see oils
  • Wear pads, guides and bushings (unfilled nylon)
  • Replacement parts for equipment that runs warm
  • Vehicle parts that must not deform in summer heat

Where to use something else

  • Tight-tolerance parts in very humid spaces, unless moisture is allowed for
  • Strong acids
  • Cosmetic parts that need a glossy finish — CF is matte and textured
  • Budget prototypes where PLA would answer the question

Grades we print

PA12 (unfilled nylon)

Tough, low friction, fatigue-resistant.

PA6-CF (carbon-fiber nylon)

Stiff, dimensionally stable, high heat limit.

Designing parts in Nylon & Carbon-Fiber Nylon

  • Carbon fiber lines up with the print path, so parts are stiffest along the layers. Tell us the load direction and we'll orient the part to suit.
  • Heat-set threaded inserts work well in nylon and beat printed threads for anything assembled more than once.
  • Unfilled nylon's low friction suits sliding parts. CF nylon is stiffer but more abrasive against soft mating surfaces.

Nylon & Carbon-Fiber Nylon questions

Is carbon-fiber nylon worth the extra cost?

When the part carries load, sees heat or replaces a machined part — usually, yes. It's often the difference between a part that works and one that creeps or cracks. For a fit check, no: print that in PLA first.

Can you print PA6-CF?

Yes. PA6-CF is one of the carbon-fiber nylons we run for engineering customers. If your drawing calls out a specific grade or brand, include it with your files and we'll tell you whether we can match it.

Is printed carbon-fiber nylon as strong as aluminum?

No, and nobody should tell you it is. It's much lighter, doesn't corrode, can be printed in shapes that would be expensive to machine, and for many brackets, fixtures and guards it's more than strong enough. When a part really should be metal, we'll say so — and we can arrange metal parts through production partners.

Does nylon absorb water?

Yes. Nylon takes on moisture from the air, which lowers stiffness and changes dimensions slightly. Carbon fiber reduces the effect. For precise parts in humid environments, tell us and we'll allow for it.

Compare with

  • Polycarbonate — Very tough, with a heat limit of roughly 110–130 °C.
  • ASA — UV-stable and good to roughly 85–100 °C — the default for parts that live outside.
  • PETG — Tougher than PLA, good chemical resistance, heat limit of roughly 65–75 °C.
  • PLA vs PETG vs ASA vs Nylon

Check your part

Need a part in Nylon & Carbon-Fiber Nylon — or not sure it's the right one?

Send your file and tell us where the part will live. A person quotes every job, usually within one business day, with a material recommendation if a different one would serve you better.

Get a Quote

Heat figures are typical published heat-deflection ranges for common filament grades at low load (0.45 MPa), not measurements of our parts. Real values vary with brand, colour, print orientation, part design and — for nylon — moisture. If a number matters to your application, tell us and we'll talk through margin and testing.