ASA vs PEI
How ASA and PEI compare, from typical settings across every filament we list.
- ASA is easier to print, better outdoors and more flexible; PEI is stiffer and more heat resistant.
- PEI typically prints about 115 °C hotter at the nozzle.
- PEI typically prints about 40 °C hotter on the bed.
- ASA is less dense, so a 1 kg spool holds about 62 m more 1.75 mm filament.
- There are 109 ASA filaments in 638 colours, and 17 PEI filaments in 24 colours.
At a glance
Our rating, out of 5| ASA | PEI | |
|---|---|---|
| Ease of printing | Easier to print | |
| Toughness | ||
| Stiffness | Stiffer | |
| Heat resistance | More heat resistant | |
| Outdoor and UV | Better outdoors | |
| Flexibility | More flexible | |
| Setup | Needs an enclosure, Needs ventilation | Needs an enclosure, Dry before printing, Needs ventilation |
| ASA | PEI | |
|---|---|---|
| Full name | Acrylonitrile styrene acrylate | Polyetherimide |
| Filaments listed | 109 | 17 |
| Brands | 66 | 10 |
| Colours | 638 | 24 |
| Nozzle temperature | 235–260 °C | 340–380 °C |
| Bed temperature | 90–110 °C | 120–160 °C |
| Density | 1.07 g/cm³ | 1.27 g/cm³ |
| Length of 1 kg (1.75 mm) | about 389 m | about 327 m |
| Max drying temperature | 85 °C | – |
Temperatures are medians across each material's filaments, rounded to 5 °C. Always check the maker's settings for a specific filament.
Brands that make both
10 brands make both ASA and PEI.