ASA Complete Settings Guide
ASA is ABS's outdoor-rated sibling: near-identical printing behavior and warping challenges, with dramatically better resistance to UV and weather. If a part will live outside — enclosures, mailbox parts, garden fixtures, anything that sees real sunlight — ASA is almost always the better default over ABS, at essentially the same printing cost.
Baseline: Bambu's stock ASA profile
| Setting | Stock value | Notes |
|---|---|---|
| Nozzle temperature | 270 °C | Range 240–280 °C |
| Bed, textured/engineering | 100 °C | Cool Plate and SuperTack unsupported (0) |
| Chamber | 65 °C | Active heating on enclosed machines |
| Part cooling fan | 25–35 % | Off first 3 layers |
| Overhang fan | 80 % | Targeted exception for bridges only |
| Flow ratio | 0.95 | Calibrate for non-Bambu brands |
| Max volumetric speed | 18 mm³/s | 35 mm³/s with the high-flow hotend |
| Impact strength (Z) | 4.9 kJ/m² | Layer-bond toughness reference |
ASA vs ABS: the one difference that matters
Printing-wise, ASA and ABS are close to interchangeable — same chamber requirement, same near-zero body cooling with a targeted overhang exception, same brim-and-warping playbook. The real difference is what happens after printing: ABS yellows and gets brittle under UV exposure within months outdoors, while ASA holds its color and toughness for years. If a part's final destination is outdoors or near a window with real sun exposure, that's the deciding factor — not print difficulty, since there essentially isn't one.
Chamber heat is not optional
ASA needs an actively heated or well-insulated chamber to print flat, full stop. Bambu's profile sets 65 °C on enclosed machines with active heating; on an open printer, a simple cardboard-and-acrylic tent replaces that function imperfectly but usefully. See the ABS/ASA warping guide for the full plate/brim/chamber playbook — everything there applies to ASA identically.
Brand cheat sheet
| Brand | Product | Nozzle | Bed | Drying |
|---|---|---|---|---|
| Polymaker | Polymaker ASA (tidl. PolyLite ASA) | 230–260 °C | 75–95 °C | 70 °C / 7 h |
| Prusament | Prusament ASA | 255–265 °C | 105–115 °C | 80 °C / 4 h |
| Overture | Overture ASA | 240–270 °C | 70–95 °C | 75 °C / 7 h |
| Elegoo | ELEGOO ASA | 240–270 °C | 90–100 °C | 80 °C / 8 h |
Common problems and where to look
- Warping and corner lift: the ABS/ASA warping guide — chamber heat and brim are the two biggest levers.
- Bridging and overhangs: the ABS/ASA bridging guide covers the same overhang-fan-only strategy ASA relies on.
- Stringing: less common than on PETG, but the same order applies — dry first, then temperature, then retraction. See the stringing guide.
Frequently asked questions
What nozzle and bed temperature should I use for ASA?
Bambu’s stock ASA profile prints at 270 °C nozzle temperature (allowed range 240–280 °C) with the bed at 100 °C on textured or engineering plates and the chamber at 65 °C. Part cooling runs at only 25–35 % and stays off for the first 3 layers, with an 80 % exception for overhangs. Flow ratio is 0.95 and max volumetric speed 18 mm³/s.
Should I choose ASA or ABS for parts that live outdoors?
Choose ASA for anything that sees real sunlight. The two materials print almost identically — same chamber requirement, same near-zero cooling, same warping playbook — but ABS yellows and turns brittle under UV within months outdoors, while ASA holds its color and toughness for years. Since ASA costs essentially the same printing effort, it is almost always the better default for outdoor parts.
Does ASA need an enclosure to print without warping?
Yes — ASA needs an actively heated or well-insulated chamber to print flat, full stop. Bambu’s profile sets a 65 °C chamber on enclosed machines with active heating. On an open printer, a simple cardboard-and-acrylic tent replaces that function imperfectly but usefully, combined with a 100 °C bed and a brim as in the ABS/ASA warping playbook.
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- Printed Model Warping: Causes and Solutions — Bambu Lab Wiki
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