3D Printing Materials: Pick the Plastic Your Part Needs

Pick PETG for most working parts. It is tough, it shrugs off water and many chemicals, and it holds up outdoors, so that a part you ship keeps working in the field. PETG is our default for production. If the part is only for show or lives indoors, PLA costs less and prints crisp detail. If the part sees real heat, pick ABS. If it has to carry load or take stress, pick PA-CF. If it has to bend or seal, pick TPU.

The right pick comes down to four questions. How hot does the part get? How hard does it get hit or loaded? Does it live outside? Does it need to flex? Answer those four and the material almost picks itself. Still not sure? Upload your part and we will suggest a fit. Use the instant quote to start.

In real parts, the big three trade heat, toughness, and finish. PETG bends before it breaks and works outside. PLA is stiff and prints the cleanest detail, but it cracks under a sharp hit and softens in a hot car. ABS takes the most heat and paints well, but big flat ABS parts can warp as they print, so we watch flatness on those.

Here is how all five compare on the numbers that decide the job. Strength is the tensile strength. Heat is the point where the part starts to lose its shape.

• PETG

  Strength

  50 MPa

  Holds shape to

  73 C

  Outdoor use

  Yes

  Flex

  Rigid

  Best for

  Outdoor parts, enclosures, jigs

• PLA

  Strength

  50 MPa

  Holds shape to

  57 C

  Outdoor use

  No

  Flex

  Rigid

  Best for

  Visual prototypes, indoor fixtures

• ABS

  Strength

  40 MPa

  Holds shape to

  98 C

  Outdoor use

  Some

  Flex

  Rigid

  Best for

  Heat exposure, painted parts

• PA-CF

  Strength

  80 MPa

  Holds shape to

  140 C

  Outdoor use

  Yes

  Flex

  Stiff

  Best for

  Load-bearing brackets, tooling

• TPU

  Strength

  35 MPa

  Holds shape to

  80 C

  Outdoor use

  Yes

  Flex

  Flexible

  Best for

  Gaskets, grips, seals, feet

The strength number is only part of the story. PLA and PETG read the same on tensile strength, but PLA snaps under a sharp hit while PETG bends first. For any part that gets handled, dropped, or loaded, that toughness gap matters more than the headline number. This is why we steer most working parts to PETG even though PLA shows the same tensile figure.

Want the design rules that keep any of these printing clean? See the 7 design checks before you upload.

You need PA-CF when the part carries load, holds tight tolerance, or sits near heat that would soften PETG. PA-CF is carbon fiber nylon, the strongest material we print. It reaches about 80 MPa tensile strength and holds its shape up to about 140 C. Pick it for structural brackets, end-of-arm tooling, and jigs that take stress, so that the part keeps its shape under real working load.

You need TPU when the part has to bend and spring back. TPU makes gaskets, gripper pads, bumpers, and seals. A rigid material would crack where TPU just flexes and returns to shape.

Both PA-CF and TPU get a fast human quote, not an instant online price. A person checks the file and replies within 4 business hours. See the PA-CF page and the TPU page for full specs and design tips.

Material is only one part of the price, but it does move the number. PLA and PETG cost the least per part. ABS sits in the middle. TPU costs more because it prints slowly. PA-CF costs the most, because the filament is pricey and the printer runs slower to lay it down clean.

PLA and PETG get an instant price the second you upload. ABS, PA-CF, and TPU route to a fast human quote. Either way, the price per part drops as your order grows, and every part ships in 2 to 5 days. Upload your STL to see real numbers for your part, or check FDM printing for how we run the job.