ASA vs ABS: The Smarter Choice for Outdoor Prints

Harry S.

ABS Has a Worthy Successor

ASA (Acrylonitrile Styrene Acrylate) is closely related to ABS (Acrylonitrile Butadiene Styrene) and, from a printing perspective, behaves very similarly. The two materials share almost identical printing requirements, similar strength characteristics, and comparable mechanical performance. The major difference is that ASA was specifically designed with outdoor durability in mind. Where ABS struggles badly under Australian sunlight, ASA remains remarkably stable.

The difference becomes obvious very quickly in real world outdoor conditions. Print the same part in both materials and leave them exposed outside through an Australian summer. In places like Perth, Brisbane, or Darwin, the ABS part will usually begin yellowing and becoming brittle within weeks. Over time, it often develops cracks and loses strength significantly. The ASA version, by comparison, will usually look almost unchanged.

That UV stability is what makes ASA such a strong replacement for ABS in most outdoor applications. In Australia especially, it is not a small improvement. For long term outdoor durability, ASA is simply the better material.

Nearly Identical Printing Requirements

One of the biggest practical advantages of ASA is that it prints almost exactly like ABS. If a printer is already capable of handling ABS successfully, it will usually handle ASA with very little additional tuning required.

Typical settings include the following:

• nozzle temperature around 240–260°C
• bed temperature around 90–110°C
• minimal part cooling
• enclosed printing environment
• strong first layer adhesion

Like ABS, ASA still benefits heavily from an enclosure because temperature stability matters enormously during printing. Large temperature fluctuations increase the likelihood of warping, layer separation, and corner lifting.

ASA generally warps slightly less aggressively than ABS, which is a welcome improvement, but it is still considered a higher temperature engineering material. Larger prints, wide flat parts, and thin geometries can still warp significantly without proper thermal management. See our dedicated anti-warping guide for techniques that apply equally to both materials.

For most users, an enclosure remains the single most important factor in printing ASA reliably. Without one, larger prints become inconsistent rapidly. When enclosure temperatures are kept at the proper level and conditions remain stable, ASA can print with extreme reliability.

Applications Where ASA Excels in Australia

ASA shines anywhere long term outdoor exposure matters. Garden hardware, irrigation mounts, plant labels, automotive trim pieces, outdoor brackets, satellite mounts, electrical enclosures, roof rack accessories, marine hardware, and fence mounted components all benefit enormously from ASA’s UV resistance. (see our gardening printing guide), (see our marine printing guide)

Vehicle interiors are another area where ASA performs particularly well. Cars experience both extreme heat and intense sunlight simultaneously, especially in Australia. Materials that perform well indoors often fail surprisingly quickly on dashboards, window mounts, or under bonnet accessories.

ASA handles these environments far more effectively because it combines strong heat resistance with long term UV stability. For anyone regularly printing functional outdoor parts, ASA often becomes one of the most useful materials to keep permanently stocked.

Where ABS Still Makes Sense

ABS is not obsolete. For indoor applications where UV exposure is not a concern, ABS remains a perfectly valid engineering material. It is still widely used, sometimes slightly cheaper, and occasionally available in colour ranges that ASA does not offer.

ABS also remains the preferred material for acetone vapour smoothing. Acetone reacts with ABS extremely effectively, allowing printed layers to chemically soften into a glossy, seamless surface finish. ASA does not respond to acetone in quite the same way, which limits its suitability for that specific finishing technique.

Even so, for most outdoor functional printing in Australia, ASA has become the more practical long term choice. It offers nearly identical print behaviour and strength characteristics while solving one of ABS’s biggest weaknesses entirely: long term UV durability under harsh Australian conditions.