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  • Filamet™ 6061 aluminum View larger

    Filamet 6061 aluminum

    The Virtual Foundry

    Temporarily out of stock

    New product


    314,90 €tax excl.
    381,03 €tax incl.

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    With 82 % metal, total metal parts with the properties of 6061 aluminum are achieved.

    Filamet™ 6061 aluminium from The Virtual Foundry (TVF) is an innovative filament composed of more than 65 % metal and the rest by PLA. The Virtual Foundry is an American company formed by great experts in the sector of molten metal, which have been constantly working since 2014 to improve and grow its range of filaments and accessories for 3D FDM metal printing. Its products are oriented to solve and simplify problems through innovative metallic materials for 3D FDM printers of any kind.

    Gear made of 6061 aluminium without sintering

    Image 1: Gear made of 6061 aluminium without sintering. Source: The Virtual Foundry

    Aluminum is a non-ferrous metal abundant in nature, forms 8 % of the earth's crust. This metal has a large number of outstanding properties: high corrosion resistance, low density, good conductor of electricity and heat, easy to machine, economical and high mechanical resistance in its alloyed forms. All these properties have led aluminum to be one of the most used metals by industry, only surpassed by steel. Its applications are so diverse that one could say that all products manufactured and used by industry use aluminum: mirrors, cans, tetrabriks, power lines, heat diffusers, cryogenic containers, etc. One of its most common alloys is Al6061, an aluminum hardened mainly with magnesium and silicon, which shows ease of being welded, good mechanical properties with a really low density. This aluminum alloy is frequently used for the construction of all types of vehicles (aircraft, yachts, cars and high performance bicycles), manufacturing of food containers and all kinds of objects that need a good balance between resistance and weight.

    The Virtual Foundry has been the pioneer in developing metallic filaments for 3D printing after many years of research and development. The great competitive advantage developed is that to obtain the pure metal parts it is only necessary to print the piece and sinter it in an oven. Other manufacturers that have tried to develop metallic filaments need to do one more process (prior to sintering in the furnace) which is the debinding that consists of a chemical process to separate the binder polymers from the metal. Therefore, it can be concluded that The Virtual Foundry is the pioneer and the benchmark in 3D metal FDM printing, obtaining a fairly simple process with results never seen so far in the world of metal fabrication.

    Currently, a large list of industry sectors are using The Virtual Foundry filaments: 3D printer manufacturers, biomedical innovation, jet engine development, radiation shielding, space exploration, nuclear energy, dental, artists or fashion design. A remarkable application is the manufacture of a drill with internal hot water heating, for drilling in the Antarctic. With the Filamet™ copper it has been manufactured, very easily and at a low cost, a drill with an internal structure extremely difficult to machine or mold has been manufactured very easily and at a low cost. Another notable application is the printing of containers for radiation shielding with tungsten Filamet™. These types of containers are used to transport reactive medicines without having to resort to lead containers (toxic). Thanks to the density of tungsten, 1.6 higher than lead, this filament is ideal for creating any type of replacement part made from lead.

    Filamet™ 6061 aluminium is a filament formed by base metal and a biodegradable and ecological polymer (PLA). This material is free of exposed metal particles and volatile solvents that can be released during printing. Formed by more than 65% 6061 aluminium and the rest by PLA, this material is extremely simple to print, since its printing properties are similar to those of the PLA, which allows any user of a FDM 3D printer create parts with this filament, without the need to buy expensive industrial 3D FDM metal printers, such as Markforged Metal X. With Filamet™ 316L properties similar to those possible with DMLS technology are achieved but with certain limitations. Due to the need to sinter the printed pieces with this filament, where the PLA is removed, the pieces have porosity, loss of volume and non-isotropy. DMLS 3D printers manage to print totally solid parts (similar to the foundry), in great detail, layer heights of 0.02 mm and without the need for post-processing, the only disadvantage compared to Filamet™ 3D FDM printing the cost of: material, manufacturing and the printers themselves.

    Rotor manufactured with  Filamet™ 6061 aluminium without sintering

    Image 2: Rotor manufactured with  Filamet™ 6061 aluminium without sintering. Source: The Virtual Foundry

    Due to its large metal content (67 %), it is necessary to place the filament inlet as aligned as possible with the extruder. Once a piece is printed, it is necessary to carry out the sintering process, in an open environment or in a vacuum or inert environment, to eliminate the polymer (PLA), taking into account that sintering values must be adjusted depending on the geometry and oven model. The product that is obtained is totally metallic, with the real properties of the metal as electrical conductivity, post-processed by sanding and polishing or even welding union; but with a certain porosity and a reduction in volume due to the loss of PLA. To know more about the whole process of printing, sintering and post-processing you should visit the "Tips for Use" section.

    Users who do not have an kiln with the necessary properties to sinter the printed parts with the Filamet™ 6061 aluminium and get the final properties of this metal, can contact us and we will assess its viability through our collaborators with ability to perform the post-processing necessary to obtain the desired final result.

    Machinable Machinable
    Fatigue resistance Fatigue resistance
    Electrical conductivity Electrical conductivity
    Thermal conductivity Thermal conductivity
    Metallic content Metallic content
    Detectable Detectable
    Moisture resistance Moisture resistance
    Hide color variations (Hide color variations)

    Post-processing: Sintered in vacuum or inert environment

    For sintering in a vacuum or inert environment, a crucible (cooking vessel) and refractory powder are neededAl2O3. he piece is prepared for sintering by placing it inside the crucible and covering it with refractory dust, taking into account that there must be at least 10 mm of dust between the surfaces of the piece and the crucible. The crucible is then placed in the oven at room temperature. The temperature is increased to 205 °C in a time of 200 minutes. Then, in a 180 minute interval the temperature is raised to 400 °C. In a 180 minute stretch increase the temperature to 555 °C and keep it for 240 minutes. Finally, let the oven cool down to room temperature. The user must take into account that sintering values must be adjusted depending on the geometry and oven model

    Filamet™ 6061 aluminium sintered graphic

    Image 1: Filamet™ 6061 aluminium sintered graphic

    With sintering in a vacuum or inert environment, the mechanical properties of the final product are directly related to the time that the printed part is maintained at the sintering temperature. If the final product is powdery and brittle, the sintering time has not been sufficient. If the print shows a surface similar to wrinkled skin, it is over sintered. Finally and as a general rule, during the sintering process the volume of the piece is reduced by 7 %.

    Sintering processSintering process

    Image 2: Sintering process. Source: The Virtual Foundry

    Post-processing: Sanding and polishing

    Cube polished copperOnce sintered the piece can be sanded and polished in the same way as a metal but following a series of indications. With water sandpaper it is possible to eliminate the printing lines and other small deformations because the loose particles during sanding adhere to the gaps due to the heat of friction. In case of using sandpaper or 3M radial disc it is recommended to start sanding with a grain of 120 (80 for 3M radial disc), being careful not to deform the most delicate areas, such as corners. Once the entire surface has been sanded, a sandpaper of the next grain should be used and so on until it increases 6 or 7 (4 times for the 3M radial disc). Before moving on to the final polishing it is recommended to use a 3000 grit sandpaper, with which a certain gloss is achieved. Finally and once the piece is cleaned with a flannel cloth, the piece can be polished. TVF recommends using a rotating tool with a polishing disc and polishing wax to make polishing faster and more efficient. Simply apply a little polishing wax on the polishing disc and polish with constant movements throughout the piece so as not to generate excess heat, which can deform the piece. In addition to sanding and polishing parts made of 6061 aluminium Filamet™, it can be carved, recast, welded and smoothed with heat application.

    General information
    Manufacturer The Virtual Foundry (USA)
    Material 6061 aluminium (67 %) + PLA 
    Format Spool of 500 g
    Density 4.5 g/cm3
    Amount of metal (volume) 66 %
    Amount of metal (mass) 67 %
    Diameter of filament 1.75 or 2.85 mm
    Diameter tolerance
    Filament length ±46 m (Ø 1.75 mm - 0.5 kg)
    ±17 m (Ø 2.85 mm - 0.5 kg)
    Color Grey
    RAL/Pantone  -
    Print settings
    Printing temperature 205 - 215 ºC
    Temperatura de base/cama 50 ºC (optional)
    FilaWarmer temperature Do not use
    Print bed temperature -
    Chamber temperature -
    Print speed 30 mm/s
    Nozzle diameter ≥0.6 mm stainless steel
    Recommended infill 100 %
    Sintering properties
    Container Stainless steel crucible
    Refractory powder Al2O3
    Maximum temperature 555 ºC
    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 55 ºC
    Melting temperature -
    Specific properties
    Transparency  Opaque
    Radiation protection (without sintering) No
    Additional Information
    HS Code 7603.10
    Diameter coil (outer) 300 mm
    Diameter coil (inner hole) 65 mm
    Coil Width 55 mm


    * The typical values detailed in this table should be considered as a reference. Actual values may vary depending on the 3D printer model used, part design and printing conditions. 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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