For heat-resistant 3D printed parts, the ladder runs polycarbonate (~120 °C) → nylon → ULTEM/PEI (~215 °C) → PEEK (~250 °C) → PPSU, with cost and printing difficulty rising at each step. Pick the lowest rung that clears your service temperature with margin. Here is how the high-temperature polymers compare.
Key Takeaways
- Match the polymer to your continuous service temperature, with margin.
- PC and nylon cover moderate heat affordably; ULTEM and PEEK cover extreme heat.
- Higher-temp polymers need industrial high-temperature printers — a bureau capability.
- Consider chemical resistance and strength alongside heat.
- Over-spec''ing wastes money; under-spec''ing fails in service.
How do high-temp polymers compare?
| Polymer | Approx. heat | Relative cost | Use |
|---|---|---|---|
| Polycarbonate (PC) | ~120–140 °C | Low-medium | Tough, moderate heat |
| Nylon (PA) | ~150–170 °C | Medium | Functional, durable |
| ULTEM (PEI) | ~153–215 °C | High | Aerospace, FST |
| PEEK | ~250 °C | Very high | Extreme heat/chemical |
| PPSU | ~180+ °C, steam-stable | High | Autoclavable medical |
How to choose
Start from your part''s continuous operating temperature and add margin, then pick the cheapest polymer that clears it while meeting strength and chemical needs. Most "high-heat" parts are well served by PC or nylon; reserve ULTEM and PEEK for genuine extremes — see PEEK & ULTEM and ULTEM 9085 vs 1010.
Frequently Asked Questions
What''s the most heat-resistant printable polymer?
PEEK, at around 250 °C continuous, with excellent chemical resistance — at premium cost.
Can these be autoclaved?
PPSU and PEEK tolerate repeated steam sterilisation — ideal for reusable medical parts. Tell us your temperature.