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Josh Bonnin

ASA vs ABS Filament: What's the Difference?

ABS and ASA are two popular thermoplastic filaments used in 3D printing. They are both strong, durable materials with a wide range of applications. However, there are some key differences between the two that make them better suited for different applications.

UV Resistance

One of the biggest differences between ABS and ASA is their UV resistance. ABS is susceptible to UV degradation, which can cause it to become brittle and yellow over time. ASA, on the other hand, is highly UV resistant, making it ideal for outdoor applications.

Chemical Resistance

ASA also has better chemical resistance than ABS. It is resistant to a wide range of chemicals, including acids, bases, and oils. ABS is also resistant to many chemicals, but it is not as resistant as ASA.

Temperature Resistance

ASA has a slightly higher heat deflection temperature (HDT) than ABS. This means that ASA can withstand higher temperatures before it deforms. ABS has an HDT of around 81°C, while ASA has an HDT of around 86°C.


Both ABS and ASA are prone to warping, but ASA is generally considered to be more dimensionally stable than ABS. This means that ASA prints are less likely to warp and deform during printing and cooling.


ABS is generally less expensive than ASA. This is because ABS is a more widely available material.


ABS is a good all-purpose filament for a wide range of applications. It is commonly used for prototyping, hobby projects, and manufacturing. ASA is a good choice for applications where UV resistance, chemical resistance, or temperature resistance is important. It is also a good choice for applications where dimensional stability is important.

Here are some examples of applications where ABS and ASA are commonly used:


  • Prototyping
  • Hobby projects
  • Manufacturing
  • Toys
  • Models
  • Cases
  • Housings


  • Outdoor applications
  • Automotive parts
  • Marine parts
  • Chemical processing equipment
  • Electrical components
  • Medical devices


Both ABS and ASA are excellent filaments for 3D printing. The best choice for you will depend on your specific needs and application. If you need a UV resistant, chemical resistant, or temperature resistant material, then ASA is a good choice. If you are looking for a more affordable and widely available material, then ABS is a good choice.

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