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Nylon PA12 and PA12S

Characteristics, Differences, and Applications

PA12 vs PA12S: Material Comparison

PA12 and PA12S are both high-performance nylon materials used in MJF 3D printing—but they serve different purposes. PA12 is stronger and better for functional parts, while PA12S offers a smoother finish for cosmetic applications. Here’s how to choose the right one for your project.
Feature PA12 PA12 Smooth
Surface Finish Rougher grain, can be post-processed Smooth straight from the printer
Strength Higher mechanical strength Slightly lower strength
Post Processing May require sanding or polishing Minimal finishing needed
Best For Functional, load-bearing parts Aesthetic, consumer-facing parts

 

Which Material Should You Choose?

Choose PA12 if mechanical strength and durability matter most.

Choose PA12 Smooth if surface quality and appearance are the priority.

Nylon Material Details

Nylon PA12

Our MJF Nylon PA 12 material is durable and high-density. It is ideal for watertight assemblies and complex designs, as well as prototypes of any kind. Available for both low- and high-volume production. Example application: functional prototypes

 

Applications Functional Prototypes, Production Parts,
Strengths
  • Stronger material – Offers greater mechanical strength than PA12S
  • Excellent chemical resistance – Suitable for harsh environments
  • Watertight capabilities – Ideal for fluid-resistant and sealed parts
  • Minimal material waste – Efficient for cost-effective production
  • High dimensional accuracy – Consistent, precise prints for functional use
  • Supports strong, load-bearing structures – Great for end-use parts and engineering applications
Weaknesses
  • Parts are printed in default grey but can be dyed to darker colors
  • Not 100% food-safe

 Characteristics

 

Price $$$$$
Lead-time 4-5 business days
Recommended Wall Thickness 1 mm
Tolerance (X,Y): +\\- 0.300mm or 100mm +\\- 0.3% (Z): +\\- 0.400mm or > 100mm +\\- 0.4%

 

Max Part Size (HP MJF 5600): 380mm x 280mm x 380mm
Layer Height 80 µm
Material Properties

PA12 has a naturally rough, grain-like finish and is grey in color.
Surface Finishes for PA12
  • Dyeing
  • Polishing
  • Vapor Smoothing

Nylon PA12 Smooth

Our PA12S material is designed for aesthetics. It is great for consumer goods and prototyping. We can produce nylon parts for prototypes, large-batch, and small-batch orders.

 

Applications Dental Molds, End-use parts, Figures
Strengths
  • Enhanced surface aesthetics – Smooth finish straight from the printer
  • Lower variable production costs – Ideal for high-volume or consumer-facing parts
  • Minimal post-processing needed – Reduces time, labor, and finishing steps
Weaknesses
  • Slight difference in material strength

 Characteristics

 

Price $$$$$
Lead-time 4-5 business days
Recommended Wall Thickness 1 mm
Tolerance (X,Y): +\\- 0.300mm or 100mm +\\- 0.3% (Z): +\\- 0.400mm or > 100mm +\\- 0.4%

 

Max Part Size (HP MJF 5600): 380mm x 280mm x 380mm
Layer Height 80 µm
Material Properties

PA12S has a naturally smooth finish. Although additional finishes can be applied. Such as Dyeing Polishing and Vapor smoothing.
Surface Finishes for PA12
  • Dyeing
  • Polishing
  • Vapor Smoothing

Learn More about the Materials

Nylon PA12

Nylon PA 12 is one of our most popular materials. It is a slightly cheaper option compared to SLS materials. It has excellent chemical resistance and is great for producing complex designs and geometries. One major advantage of PA 12 is the reusability of the excess powder after printing, making it an environmentally clean manufacturing technology.

Learn more about Nylon PA12

Nylon PA12 Smooth

PA12 Smooth is a premium variant of our popular Nylon PA12 material, designed for parts that demand a refined surface finish right off the printer. It retains all the key benefits of standard PA12—great chemical resistance, durability, and excellent performance with intricate geometries—while offering a noticeably smoother texture.

Learn more about PA12 S

FAQ’s

  • What’s the key difference between PA12 and PA12S?

    The key difference is surface finish vs strength.
    PA12 offers higher mechanical strength and durability, while PA12S is optimized for a smoother surface finish straight out of the printer, reducing the need for post-processing.

  • Is PA12S as strong as PA12?
    No. PA12S is slightly less strong than standard PA12.
    PA12 is the better choice for load-bearing or functional parts, while PA12S trades a small amount of strength for improved surface quality.
  • Does PA12 need sanding or finishing?
    PA12 may require sanding, polishing, or other post-processing if a smooth or cosmetic surface is needed.
    For purely functional parts, post-processing is often optional.
  • Which material is better for functional, load-bearing parts?

    PA12 is the better option for functional and load-bearing applications.
    Its higher mechanical strength and durability make it more suitable for engineering parts, fixtures, and end-use components.

  • Which material is better for cosmetic or consumer-facing parts?
    PA12S is better for cosmetic or consumer-facing parts.
    Its smooth surface finish straight from the printer reduces finishing time and delivers a cleaner appearance for visible components.
  • Can both PA12 and PA12S be dyed or colored after printing?
    Yes — both materials can be dyed after printing, but PA12S typically absorbs dye more evenly due to its smoother surface, resulting in more consistent color.
  • How do I decide between PA12 and PA12S if I need both strength and good surface finish?

    If you need a balance of strength and aesthetics, consider the parts primary purpose:

    • Prioritize strength and functional performance → PA12

    • Prioritize visual quality and minimal finishing → PA12S