Bambu Lab ASA

Bambu Lab ASA Filament — 1.75 mm, 1 kg

ASA (acrylonitrile styrene acrylate) is the material you reach for when a part has to go outside and stay there. It shares the strength and heat tolerance of ABS, but adds the one thing ABS lacks: genuine UV stability. Where PLA sags on a hot dashboard and ABS yellows and goes brittle after a summer on the roof, Bambu Lab ASA holds its colour, its shape and its impact strength through repeated sun, rain and temperature swings.

That makes it a natural fit for garden and irrigation fittings, letterbox and fence hardware, drone and RC bodies, automotive trim and sensor housings, solar and antenna mounts, outdoor enclosures, and signage. Schools and makerspaces use it for projects that need to survive a term outdoors; small businesses use it for end-use parts they'd otherwise have to injection mould. It's an enthusiast-level material — you'll want an enclosed printer — but on a Bambu Lab machine it's genuinely straightforward.

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Why makers choose Bambu Lab ASA

Outstanding UV resistance 100 °C heat deflection 41 kJ/m² impact strength Weather & oxidation stable ± 0.03 mm tolerance RFID spool — AMS ready Sealed with desiccant Sandable & paintable

Bambu Lab's consistency is the quiet advantage here. A tight ± 0.03 mm diameter means steady extrusion across a whole spool, and the embedded RFID tag lets an AMS identify the material and colour automatically — load it and the printer already knows what profile to use. Parts finish well too: ASA sands cleanly and takes paint and adhesive better than most PLA.

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Print settings

• Nozzle temperature: 240–270 °C
• Bed temperature: 80–100 °C, with glue stick on the plate
• Build plate: Engineering or High Temperature plate — textured PEI is not recommended
• Chamber temperature: 45–60 °C — an enclosed printer makes a real difference
• Print speed: up to 250 mm/s
• Part cooling: keep it low or off — aggressive fan is the main cause of warping and layer splitting in ASA. Exact fan percentage: [VERIFY]
• Drying before printing: 80 °C for 8 hours
• Nozzle: standard 0.4 mm stainless/hardened steel is fine — no abrasive fillers in plain ASA

If you're running a Bambu Lab X1, P1 or H2 series printer, the built-in Bambu ASA profile already has all of this dialled in. On an A1 or A1 mini, or any other open-frame machine, ASA will still print — just shield it from draughts and expect more warping on large, flat parts.

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Specifications

Material	ASA (Acrylonitrile Styrene Acrylate)
Diameter	1.75 mm
Diameter tolerance	± 0.03 mm
Spool weight	1 kg net (filament with spool)
Print temperature	240–270 °C
Bed temperature	80–100 °C (with glue)
Max print speed	< 250 mm/s
Drying	80 °C for 8 hours
Density	1.05 g/cm³
Heat deflection temp.	100 °C
Impact strength	41.0 ± 2.3 kJ/m²
Tensile strength	37 ± 3 MPa
Colours available	5 — Red, Green, Blue, White, Gray

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Available colours

Every colour shares the same specs and print profile — pick the shade, not a different material. Choose your colour from the dropdown above.

Red · 45200 Green · 45500 Blue · 45600 White · 45100 Gray · 45102

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Tips from our workshop

Beat the warp before it starts. ASA shrinks as it cools, so the two things that ruin a print are draughts and cold air blowing on the part. Keep the enclosure closed (and the door shut for the first few layers), run the part fan low or off, and use a glue stick on the plate for a proper first-layer grip. For big flat footprints, a brim is cheap insurance.

Keep it dry — Australian summers are humid. ASA absorbs moisture from the air, and wet filament prints with stringing, a rough surface and weaker layers. Store spools sealed with desiccant below 20% RH, and if a spool has been sitting out, dry it at 80 °C for 8 hours before a job that matters. ASA also gives off a noticeable odour while printing, so run it in a ventilated room — and if you're annealing finished parts for extra strength, 80–90 °C for 6–12 hours does the job.