3D Printer Filament Types Explained (2025)
Eight materials cover 99% of FDM printing. Here is exactly what each one does, what it costs, and what printer you need to run it successfully.
All filament types at a glance
| Material | Nozzle (°C) | Bed (°C) | Difficulty | Strength | Max temp | Best use |
|---|---|---|---|---|---|---|
| PLA | 195–220 | 0–60 | Easy | Low–Med | ~60 °C | Prototypes, figurines, most hobby prints |
| PLA+ | 205–225 | 0–60 | Easy | Medium | ~65 °C | Functional parts needing PLA ease + more toughness |
| PETG | 225–245 | 70–85 | Medium | Medium | ~80 °C | Food-safe, impact-resistant, outdoor short-term |
| ABS | 230–250 | 100–110 | Hard | Med–High | ~105 °C | Heat-resistant parts; enclosure required |
| ASA | 240–255 | 80–100 | Hard | Med–High | ~95 °C | Outdoor, UV-resistant; ABS-like but weather-safe |
| TPU | 220–240 | 25–40 | Medium | Flex | ~80 °C | Phone cases, gaskets, flexible joints |
| Nylon | 250–270 | 70–90 | Hard | High | ~120 °C | Engineering parts, living hinges; enclosure required |
| PC | 260–310 | 100–120 | Hard | Very High | ~145 °C | High-stress structural parts; all-metal hotend required |
PLA — the default starting point
PLA is made from cornstarch and prints at 195–220 °C with no heated bed required. It is dimensionally accurate, rarely strings, and comes in every color imaginable. The trade-off is heat resistance: PLA parts soften above 60 °C, so avoid use near engines, in cars, or outdoors in direct sun.
PETG — the practical step-up
PETG prints at 230–245 °C with a 70–85 °C bed, adds meaningful impact resistance over PLA, and handles up to ~80 °C. It is food-contact safe (when printed correctly, without dyes) and largely warp-free on a PEI bed. The main challenge is stringing — manage it with lower print temperatures and tuned retraction.
→ PETG settings guide · PETG slicer settings · PLA vs PETG comparison
ABS and ASA — high-temperature workhorse
ABS handles up to ~105 °C and is fully post-processable (acetone smoothing). It requires an enclosure to prevent warping, 100–110 °C bed, and zero cooling fan. ASA is functionally similar but adds UV resistance — use it whenever parts will see outdoor sunlight.
TPU — flexible filaments
TPU (thermoplastic polyurethane) produces rubber-like, impact-absorbing parts. Shore hardness determines flex: 95A is semi-rigid (phone cases), 85A is very flexible (gaskets, grips). Direct drive extruder strongly recommended. Print slow (20–35 mm/s) with minimal retraction.
Nylon — engineering strength
Nylon offers the best strength-to-weight ratio of common FDM materials with excellent fatigue resistance. The challenge: it absorbs moisture aggressively — dry it for 8–12 h before printing and store in a sealed box. Needs 250–270 °C, an enclosure, and an all-metal hotend.
PC — maximum performance
Polycarbonate is the strongest common FDM filament (HDT ~145 °C) and virtually transparent when printed at correct temperatures. It requires 260–310 °C, an all-metal hotend, an enclosed chamber, and an abrasion-resistant nozzle for filled variants. Not beginner territory.
Which filament to buy first
Start with our filament recommendations by material type — top picks for PLA, PETG, TPU, and ABS with settings and brand comparisons.
Frequently asked questions
What are the main types of 3D printer filament?
The main types are PLA (easiest, most popular), PETG (balanced strength + printability), ABS (high temperature, needs enclosure), ASA (like ABS but UV-resistant), TPU (flexible), Nylon (strong, engineering-grade), and PC (highest strength and temperature resistance).
What type of filament should a beginner use?
PLA is the best beginner filament — it prints at low temperatures (200–220 °C), does not need a heated bed, and rarely warps. PLA+ adds toughness with the same ease of printing.
Which filament is the strongest?
Polycarbonate (PC) has the highest strength and heat resistance of common filaments (HDT ~145 °C), but requires an all-metal hotend and 260–310 °C. For most users, Nylon or carbon-fiber PETG is a more practical choice.
Can you print PETG on an Ender 3?
Yes. The Ender 3 (and most Creality printers) can print PETG at 230–240 °C nozzle with a 70–80 °C bed. The stock PTFE-lined hotend is rated to 240 °C, which is sufficient for PETG but not for ABS or Nylon at extended sessions.
What filament does not warp?
PLA warps the least of any common filament. PETG is also warp-resistant on a heated PEI bed. ABS, ASA, and Nylon warp significantly without an enclosed chamber maintaining 40–50 °C.