ULTEM 9085 is the choice for aircraft interior parts thanks to its certified flame-smoke-toxicity (FST) rating; ULTEM 1010 offers higher strength, stiffness, and heat resistance for tooling and the most demanding functional parts. Both are high-performance PEI thermoplastics far beyond standard FDM materials. Here is how to choose between them.
Key Takeaways
- ULTEM 9085 — certified FST, great strength-to-weight; the aerospace cabin standard.
- ULTEM 1010 — highest heat resistance (~215 °C) and strength; food/bio-compatible grades exist.
- Both are PEI: chemical-resistant, flame-retardant, dimensionally stable.
- 9085 for flight-certified interiors; 1010 for tooling, jigs, and high-heat parts.
- Require high-temp industrial printing — a bureau capability.
How do they differ?
| Property | ULTEM 9085 | ULTEM 1010 |
|---|---|---|
| Heat resistance | ~153 °C | ~215 °C |
| Strength/stiffness | High | Highest |
| FST rating | Certified (aerospace) | Good |
| Best for | Aircraft interiors | Tooling, high-heat parts |
Which should you choose?
Choose 9085 when the part flies inside a cabin and must meet FAR 25.853 burn requirements — ducting, brackets, panels. Choose 1010 when you need maximum heat resistance and strength for tooling, fixtures, or under-hood and process parts. Both pair well with our aerospace workflow and FST material guidance.
Frequently Asked Questions
Is ULTEM the same as PEEK?
No — both are high-performance polymers; PEEK has higher heat/chemical resistance and cost. See PEEK & ULTEM.
Can you print certified aerospace parts?
We run documented quality processes; tell us your spec and documentation needs. Get a quote.