3DXTechOBSIDIAN™ FR-NylonUL94 V-0 Carbon-Reinforced Flame-Retardant Nylon — A Markforged Onyx-FR™ Alternative
Flame-retardant, carbon-reinforced nylon for safety-critical parts.
OBSIDIAN™ FR-Nylon is 3DXTech's affordable alternative to Markforged® Onyx-FR™ — a carbon-fiber-reinforced nylon that achieves a UL94 V-0 flame rating (3.0 mm) from an accredited third-party lab. Built on the proven Obsidian+CF v2 platform, it delivers strength, toughness, chemical resistance, and flame retardancy with a stunning surface finish, validated on both Markforged and open-source printers. Made in the USA. Full specifications →
Made in the USA — ships from Rev1. Safety-critical or regulated application? Call (248) 707-2950 to confirm fit.
UL94 V-0 flame-retardant nylon, validated by an accredited third-party lab.
3DXTech compounds OBSIDIAN™ FR-Nylon in Grand Rapids, Michigan on the proven Obsidian+CF v2 platform, with a published TDS and an accredited UL94 V-0 classification. Rev1 Technologies is your authorized 3DXTech reseller and US support partner, Auburn Hills, Michigan.
The proven Obsidian™ platform — now with UL94 V-0 flame protection.
As Obsidian™ became one of 3DXTech's most trusted materials for demanding engineering work, the platform was extended to meet the growing need for flame-retardant performance. OBSIDIAN™ FR-Nylon combines the same mechanical strength, print consistency, and reliability of the carbon-reinforced Obsidian+CF v2 base with enhanced fire protection — a genuine, affordable alternative to Markforged® Onyx-FR™ that prints on both the Markforged platform and open-source machines.
Structural strength and regulatory compliance in one material.
For manufacturers who need both mechanical performance and flame retardancy.
OBSIDIAN™ FR-Nylon achieves a UL94 V-0 rating at 3.0 mm from an accredited, third-party lab while holding excellent surface finish, dimensional stability, and repeatable results. Carbon-fiber reinforcement gives it a high tangent modulus and a 164 °C heat-deflection temperature, so parts stay stiff and stable under load and heat — ideal where structural performance and fire safety both matter.
Real engineering properties, from a published TDS.
3DXTech's published OBSIDIAN™ FR-Nylon values (TDS v1.1), third-party-lab tested. FDM parts are anisotropic, so tensile and modulus values vary by print orientation — representative figures shown below.
Vertical burn test at 3.0 mm (UL94) — the top self-extinguishing classification, from an accredited lab.
Deflection temp at 66 psi (ASTM D648) — parts stay stable at elevated temperatures.
Notched Izod (ASTM D256) — genuine toughness for functional parts.
Edge orientation (ASTM D638) — carbon-reinforced strength; varies by orientation.
Edge orientation (ASTM D790) with a ~1990 MPa tangent modulus — stiff under bending load.
ISO 1183 — light, carbon-reinforced parts with a premium matte finish.
A demanding, high-performance material — print it right.
3DXTech's recommended conditions. As a carbon-fiber-reinforced nylon, OBSIDIAN™ FR-Nylon is abrasive and hygroscopic — a hardened nozzle and proper drying are required, and a heated chamber is recommended for best results.
High-temperature nylon range — an all-metal hotend is required.
A hot bed with a nylon-friendly adhesive for reliable first-layer grip.
A ~65 °C chamber improves layer adhesion and dimensional stability.
Carbon fiber is abrasive — a hardened steel (or ruby) nozzle is required to avoid rapid wear.
Run 0.20 mm or higher for the best strength and surface finish.
Nylon is very hygroscopic — dry at 70 °C for ~6 hours and print from a dry box.
Safety-critical parts that must pass fire and structural requirements.
OBSIDIAN FR-Nylon vs. Markforged Onyx-FR™ — head to head.
3DXTech's published third-party lab data, tested one-to-one against Onyx-FR™ on identical Markforged printers, settings, and orientations (Edge orientation shown). Confirm exact figures against each TDS.
| OBSIDIAN FR-Nylon | Markforged Onyx-FR | Standard Nylon | |
|---|---|---|---|
| Flame rating (UL94) | V-0 (3.0 mm) | V-0 | None |
| Tensile strength (Edge) | 36.7 MPa | 30.1 MPa | Varies |
| Young's modulus (Edge) | 3350 MPa | 1770 MPa | Lower |
| Flexural strength (Edge) | 51.9 MPa | 43.3 MPa | Varies |
| Reinforcement | Carbon fiber | Carbon fiber (Onyx) | Unfilled |
| Platform | Markforged + open-source | Markforged only | Open-source |
| Heat deflection (HDT) | 164°C | High | Varies |
| Positioning | Affordable FR alternative | Premium OEM | General-purpose |
Values from 3DXTech's published third-party comparison (Edge orientation, ASTM methods). Onyx-FR is a trademark of Markforged; comparison for reference only. Confirm exact properties against each TDS.
3DXTech OBSIDIAN™ FR-Nylon Technical Data
Check the reel fits your printer.
Standard spool dimensions — confirm it fits your AMS, Markforged, or dry box.
3DXTech ships OBSIDIAN FR-Nylon on consistent, standard reels.
Before you buy, check the outer diameter, width, and center bore against your printer's spool holder, automated material system, or drybox. Open the full 3DXTech reel infographic for the exact 750 g spool dimensions.
View reel dimensions →RESOURCES
Datasheet, Safety Data & Print Support
Everything you need to qualify and print OBSIDIAN™ FR-Nylon.
WHY REV1 TECH
Authorized 3DXTech Reseller. Engineering-Materials Specialists.
Rev1 Technologies is an authorized 3DXTech reseller in Auburn Hills, MI, supplying genuine USA-made filament with real print support.
We help you pick the right polymer, dial in the profile, and keep production running.
FAQ
3DXTech OBSIDIAN FR-Nylon — Common Questions
What flame rating does it achieve?
OBSIDIAN™ FR-Nylon achieves a UL94 V-0 classification at 3.0 mm thickness, verified by an accredited third-party lab. V-0 is the top self-extinguishing rating in the UL94 vertical-burn test.
Is it a Markforged Onyx-FR alternative?
Yes. It's formulated to integrate seamlessly into the Markforged® platform as an affordable alternative to Onyx-FR™, and 3DXTech's third-party testing shows comparable or better mechanical performance. It also prints on open-source machines.
Do I need a hardened nozzle?
Yes. It's carbon-fiber-reinforced and abrasive, so a hardened steel (or ruby) nozzle is required to avoid rapid wear. Print at 265–285°C with an all-metal hotend.
Do I need a heated chamber?
A heated chamber (~65°C) is recommended for best layer adhesion and dimensional stability, along with a hot bed at 90–110°C. It can print on capable open-bed machines, but enclosed/heated-chamber printers give the best results.
Does it need drying?
Yes — nylon is very hygroscopic. Dry at 70°C for about 6 hours and print from a dry box for the best surface finish and mechanical performance.
Is it made in the USA?
Yes — 3DXTech manufactures and compounds OBSIDIAN™ FR-Nylon in its 68,000 sq-ft facility in Grand Rapids, Michigan, with published data and lot traceability.