FDM – OBSIDIAN NYLON 6+CF Printing Material

Obsidian Nylon 6+CF v2 (also known as PA6-CF) is a carbon fiber-reinforced polyamide filament developed by 3DXTECH for high-performance FDM 3D printing. Engineered as a drop-in alternative to Markforged Onyx, this Nylon 6 composite is filled with chopped carbon fiber to deliver superior mechanical strength, thermal stability, and dimensional accuracy. Optimized for both Markforged and open-source platforms, Obsidian CF v2 offers excellent layer adhesion, a sleek matte black finish, and improved tensile and flexural properties across multiple print orientations—making it ideal for functional prototypes and end-use parts.

Key Material Facts:

• Carbon fiber-reinforced Nylon 6
• Excellent surface finish at high print speeds
• Superior stiffness and strength vs. Onyx
• High heat deflection temperature (147°C)

Common Applications:

• Functional prototypes
• Jigs and fixtures
• End-use mechanical components
• Automotive brackets and housings
• Aerospace tooling

Design Considerations:

• We only run Obsidian Nylon 6+CF v2 on our small desktop FDM print farm so you are limited to parts that are 13.38″ x 12.59″ x 13.38″ in size in this material. If you need a bigger part we can run it on our large frame FDM machines in something like ABS or PC-ABS.
• Excellent dimensional stability for tight-tolerance parts
• Best printed with solid infill for structural applications

Frequently Asked Questions about Obsidian Nylon 6+CF v2 3D Printing Material

What is Obsidian CF v2 made of??

Obsidian CF v2 is a carbon fiber-reinforced Nylon 6 (polyamide) filament designed for high-performance FDM printing.

Is Obsidian CF v2 compatible with Markforged printers?

Yes, it’s optimized for the Markforged X7 and performs well on open-source platforms which is what we run this material on here at F3DP.

Can it be used for end-use parts?

Absolutely. Its strength and thermal resistance make it suitable for functional components.

What are the mechanical advantages over Onyx?

Obsidian CF v2 shows higher tensile and flexural modulus values across most orientations.

Material Reference Data:

• For more information on how the FDM printing process works please check out this page.
• For general FDM part design trick and tips check out this page.

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FDM – OBSIDIAN NYLON 6+CF: Technical Specifications:

Mechanical Properties for OBSIDIAN NYLON 6+CF 3D printing material

Property Description	Testing Method	Measurement
Tensile Strength	ASTM D638	23.4 MPa
Tensile Modulus	ASTM D638	1,351.4 MPa
Flexural Strength	ASTM D790	33.9 MPa
Flexural Modulus	ASTM D790	1,048.0 MPa
Izod Impact, Unnotched	ASTM D256	854 J/m
Heat Deflection Temperature at 0.45 MPa (66psi)	ISO 75	147°C
Density	ISO 1183	1.2 g/cc

Full material spec spec sheet can be downloaded here.

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