ABS vs ASA for 3D printing
Choose ABS for enclosures and housings; choose ASA for outdoor signage, mounts, and fixtures.
ASA — starting price
$10.00 / part
Weatherproof, UV-resistant, high-temp. For outdoor parts.
Full ASA guideSide by side
| Property | ABS | ASA |
|---|---|---|
| Strength | High, impact-resistant | High, impact-tough |
| Flexibility | Slight | Slight |
| Heat resistance | High | High |
| Outdoor / UV | Poor (choose ASA) | Excellent — the reason to choose it |
| Finish | Acetone-smoothable to a gloss | Matte; can be acetone-smoothed |
| Density | 1.04 g/cm³ | 1.07 g/cm³ |
| Starting price | $10.00 / part | $10.00 / part |
Choose ABS when…
- Enclosures and housings
- Mechanical parts that get drilled or tapped
- Parts that need a smooth, glossy finish
- Moderate-heat environments
Reach for something else for
- Outdoor parts — ASA resists UV where ABS yellows and gets brittle
Choose ASA when…
- Outdoor signage, mounts, and fixtures
- Automotive trim and exterior parts
- Enclosures exposed to sun or rain
- Parts that must not yellow or crack outdoors
Reach for something else for
- Ultra-budget indoor prototypes — PLA is far cheaper for those
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