Category: Uncategorized

Markforged Material Comparison at a glance

In the table below, you will find a quick comparison of some Markforged Composite Materals for high performance printing.

Carbon Fiber Fiberglass HSHT Fiberglass Kevlar®
Properties High strength-to-weight ratio, stiff Sturdy, cost-effective Sturdy, high heat deflection Tough, impact-resistant
Ideal Load Type Constant loading Intermittent loading Constant loading at high temperatures Impact loading
Failure Behavior Stiff until fracture Bends until fracture High energy-absorption until fracture Bends until deformation
Characteristics and Advantages Metal stiffness and lightweight strength Economical starting point, general-use fiber Keeps strength at high temperatures High deflection and impact resistance

A video test of Markforged’s Onyx FR’s flame retardant capabilities

Putting feet to the fire: A video test of Markforged’s Onyx FR’s flame retardant capabilities.

Time to play with matches! Because of the huge potential of an affordable & Flame-retardant composite plastic that can be 3D printed, we decided to put Markforged’s Onyx FR to the test.

In the video, we hung up two sample prints: One of Markforged’s standard-issue, chopped carbon fiber “Onyx” material (labeled ‘O’), and one of Markforged’s brand-new Onyx FR (labeled ‘F’).

After taking a blowtorch to the original Onyx Material for nearly 10 seconds, we saw it catch fire and start dripping melted plastic before the 10 seconds was even over! Putting the FR material in the blowtorch’s “hot-seat” for over 10 seconds barely affected it! As soon as we pulled the blowtorch away, the flame flickered out – not even a second later!

Below, you’ll find a short video showing the aftermath:


Printing A2 Tool Steel at the DEX EXPO

Video Transcript:

Hello Everyone, this is Matt Jones from Miller 3D. We’re at the Design and Engineering eXpo (DEX) in Sherbrook, Quebec today and we have the Mark Two, the Metal X, and the Markforged X7 all printing parts today.

The New A2 Tool Steel: First Run

What I wanted to show you is that on the Metal X, we’re using the new A2 Tool Steel. We completed our first print with A2 today. It’s this little gear part here.

Why A2 is important: Tough Stuff!

A2 is very good for tooling & fixturing, and a lot of manufacturers/machine-shops like A2 because of the hardness that they can achieve. Right out of the sinterer, it will be around 52 Rockwell, and then you can heat treat it up to 60-62 Rockwell if you need to.

Contact us to learn more about A2 tool steel

So there you go; this is our first print with A2 tool steel. If you’d like to learn more about Markforged, The Metal X, or composites, you can reach us at