Nylon vs PETG: When Engineering Strength Is Worth the Hassle
Updated 2026-06-11 · by Jay
PETG is the strongest material most people ever need. Nylon is what you reach for when PETG provably isn't enough — and it charges admission.
The short answer
- PETG for brackets, mounts, enclosures, outdoor parts — strong, cheap, printable on anything; our best PETG picks cover it.
- Nylon (PA) for gears, living hinges, sliding parts, high-load clips — anywhere parts rub, flex repeatedly, or carry real load.
Where nylon actually wins
Wear and fatigue. Nylon's killer feature isn't peak strength — it's surviving repetition. A PETG gear wears visibly in weeks; nylon shrugs it off. Living hinges in nylon flex thousands of cycles.
Heat. Nylon stays functional past 100°C; PETG softens around 75-80°C.
Toughness. Nylon deforms instead of cracking, even more than PETG.
What nylon costs you
- Hardware: 250-280°C nozzle temperatures — sustained, which means an all-metal hotend; many stock machines top out at 260°C.
- Moisture: the most hygroscopic common filament. Days in open air ruin it; serious nylon users print straight from a heated dry box, and a good filament dryer becomes mandatory rather than optional.
- Warp: less than ABS, more than PETG — an enclosure helps a lot.
- Price: typically 2-3× PETG per kilogram.
The honest decision rule
If the part fails in PETG, identify how: wore out or fatigued → nylon. Melted → nylon or ASA. Just snapped once under overload → often a design fix (more perimeters, fillets) keeps you in PETG for a third of the cost and none of the drying ritual.
