General Information

Markforged Onyx is an ideal material for customer-facing parts that need to look good while standing up to industrial requirements.

Onyx is based on a remarkably tough nylon, but also provides parts with stiffness equal to or greater than any pure thermoplastic material available for professional 3D printers. It’s easy to print and far more rigid in assemblies.

Onyx can be used alone, or further reinforced with embedded continuous carbon fiber, Kevlar, or fiberglass layers - parts truly transcending the limits of conventional 3D printed plastic.

The following is useful information regarding printing with Onyx:

  • Like all Markforged materials, parts printed using Onyx are ready for use right off the print bed.
  • Onyx has a heat deflection rating of 145°C
  • Parts printed in Onyx warp far less than parts printed in Nylon

Printing significant amounts of Onyx conditions the print head in a way that tailors it toward printing Onyx. Customers are free to begin printing Onyx at any point after printing Tough Nylon. However, once you start printing Onyx, your printer will be conditioned for Onyx and you will not be able to switch back to Tough Nylon. Customers interested in continuing to use both materials are encouraged to purchase a second print head or printer.

However, if a printer is capable of using Onyx filament, then the same print head can switch back and forth freely between Nylon White and Onyx.


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Material Specifications

The following chart outlines the product specifications for Onyx as well as for Tough Nylon.

Property Test Standard Onyx Tough Nylon
Tensile Strength (MPa) ASTM D638 36 54
Tensile Modulus (GPa) ASTM D638 1.4 0.94
Tensile Strain at Break (%) ASTM D638 58 260
Flexural Strength (MPa) ASTM D790* 81 32
Flexural Modulus (GPa) ASTM D790* 2.9 0.84
Flexural Strain at Break (%) ASTM D790* N/A** N/A**
Heat Deflection Temperature (°Celcius) ASTM D648
Method B
145 44-50
Density (g/cm^3) N/A 1.18 1.10

*Measured by a method similar to ASTM D790
**Flexural Strain at Break is not available because neither material breaks before the test ends.

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