Filamet™ tungsten pellets View larger

Filamet™ tungsten pellets

The Virtual Foundry

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910,00 €
910,00 €

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Filamet™ tungsten pellets to make metal filament or use pellet extruder.

The Virtual Foundry's Filamet™ tungsten pellets are small cylinders composed of PLA with a tungsten metal filler. These pellets are composed of 92-95% metal and the rest PLA.

PLA (polylactic acid) is a biodegradable plastic obtained from natural resources such as starch extracted from corn, sugar beet and wheat. PLA is one of the most widely used materials in 3D printing today because it does not give off harmful gases and is easy to print.

Tungsten is a metal of high density, high hardness, with the highest melting point (3422 ºC) of all metals and the highest boiling point (5930 ºC) of all materials. These properties make tungsten ideal for the manufacture of filaments for incandescent lamps, electrical resistors, welding electrodes and other elements subjected to high operating temperatures. The military sector has made extensive use of this material since the Second World War due to its high density and hardness, ideal properties for making armour for vehicles (land and air) and projectile tips that are used to attack tanks and aircraft. Its applications do not end there; tungsten alloys are commonly used in high-speed cutting tools, pen tips, fluorescent tubes, jewellery and ceramic pastes.

In addition to the intrinsic properties of tungsten, The Virtual Foundry's (TVF) Filamet™ tungsten pellets are perfect for 3D printing, achieving high print quality, and stand out from other metal-filled materials by allowing the user to obtain fully metallic parts after a sintering process.

Piece printed with PLA Tungsten

Image 1. Piece printed with Filamet™ tungsten pellets. Source: The Virtual Foundry

During the sintering process of 3D printed parts with these pellets, the PLA is removed, resulting in all-metal parts with the real properties of metal, but with some porosity and a reduction in volume due to the loss of PLA.

Filamet™ tungsten pellets are free of exposed metal particles and volatile solvents that may be released during the 3D printing process, resulting in a safe material for 3D printing. In addition, due to their PLA content, they are very easy to process. There are several methods for using pellets in 3D printing:

  • Filamet™ tungsten pellets can be used to make filament for FDM 3D printers using Filastruder or any other filament extruder.
  • It is possible to use a pellet extruder directly.

When using Filamet™ tungsten pellets to make filament with a filament extruder such as Filastruder or using a pellet extruder for direct 3D printing, it should be noted that the extrusion temperature must be regulated in relation to the extrusion speed used. For optimal results, it is recommended to read the product's usage tips.

Hide color variations (Hide color variations)

Due to the high amount of metal particles, clogging may occur in nozzles with a diameter of 0.4 mm, so it is recommended to use nozzles with an output diameter of more than 0.5 mm.

As far as infill, the average recommended amount is 30-70 % but it largely depends on what kind of part the user wants to obtain and whether the part will be sintered or not. For more indepth information please watch this video:

Video 1: The recommended infill for the TVF materials. Source: TVF.

It is very important to store Filamet™ tungsten pellets in an airtight bag to prevent them from absorbing moisture from the environment before use. If the pellets have moisture in them, the filament to be manufactured may contain small imperfections.

Once the filament has been manufactured using Filamet™ tungsten pellets, it is also recommended to store the filament in a dry place or in an airtight bag. This prevents the filament from absorbing moisture, thus obtaining better results during 3D printing.

Whether using a filament extruder such as Filastruder or a direct pellet extruder, parts 3D printed with Filamet™ tungsten pellets must undergo a sintering process to achieve all-metal parts.:

Sintering process

This material is at an experimental stage, so an optimised sintering process is not yet available.

General information
Manufacturer The Virtual Foundry (USA)
Material Tungsten (95 %) + PLA 
Format -
Density 8 g/cm3
Amount of metal (volume) 66 %
Amount of metal (mass) 95 %
Diameter of filament -
Diameter tolerance
Color Dark grey
RAL/Pantone  -
Sintering properties
Container -
Refractory powder -
Maximum temperature -
Mechanical properties
Izod impact strength -
Charpy impact strength -
Elongation at break -
Tensile strength -
Tensile Modulus -
Flexural strength -
Flexural modulus -
Surface hardness -
Thermal properties
Softening temperature -
Melting temperature -
Specific properties
Transparency  Opaque
Radiation protection (without sintering) No
Additional Information
HS Code 7403.22

* The typical values detailed in this table should be considered as a reference. We recommend confirming the results and final properties with own tests. For more information you should consult the technical data sheet of the product.


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