PA11 is a bio-based nylon with superior impact strength and ductility; PA12 is more dimensionally stable, captures finer detail, and costs less. Both are the workhorses of SLS printing — choose PA11 for parts that flex and absorb impact, PA12 for precise, stable functional parts. Here is the comparison.
Key Takeaways
- PA11 — renewable (castor oil), high impact and elongation; ideal for snap fits and living hinges.
- PA12 — finer detail, better dimensional stability, lower cost; the SLS default.
- Both are strong, isotropic-ish in SLS, and chemically resistant.
- PA11 is more sustainable; PA12 more economical and precise.
- Filled grades (GF/CF) build on PA12 for stiffness.
How do PA11 and PA12 compare?
| Property | PA11 | PA12 |
|---|---|---|
| Origin | Bio-based (castor) | Petroleum |
| Impact / ductility | Higher | Good |
| Detail / stability | Good | Better |
| Cost | Higher | Lower |
| Best for | Impact, hinges, clips | Precise functional parts |
Which should you choose?
Choose PA11 for parts that must survive drops, repeated flexing, or snap-fit assembly, and where sustainability is a priority. Choose PA12 for precise, stable enclosures, housings, and most general SLS work — it is the cost-effective default. For stiffness, step up to filled PA12 — see glass vs carbon nylon.
Frequently Asked Questions
Is PA11 stronger than PA12?
PA11 is tougher (more impact/elongation); PA12 is slightly stiffer and more precise. Choose by load type.
Which is better for snap-fits?
PA11 for its ductility and fatigue resistance. See snap-fit design. Get a quote.