Prusament · Radiation Shielding Special order
PETG Tungsten 75%
A PETG heavily filled with tungsten — 75% by weight — for printing complex X-ray and gamma-ray shielding parts. Non-toxic and hypoallergenic, a workable alternative to lead.
75%
Tungsten content by weight
1.402mm
Half-value layer · ⁹⁹ᵐTc, 140 keV
4g/cm³
Material density
Lead-free
Non-toxic, hypoallergenic
The material
Shielding you can print
Prusament PETG Tungsten 75% is a highly specialized filament designed mainly for radiation shielding. The tungsten powder inside the PETG is a heavy metal that doesn’t react with water and resists oxidation at room temperature — and unlike lead, tungsten is hypoallergenic and non-toxic.
That makes it suitable for creating complex X-ray and gamma-ray shielding components — not only for medical work — in an easier, faster way than conventional machining or casting. It prints with a metallic gray finish and can be polished like other metal-filled materials.
Made in-house by Prusa Research to a guaranteed ±0.03 mm diameter tolerance.
Prusament PETG Tungsten 75%. Source: prusa3d.com / prusament.com.
Shielding performance
The numbers Prusa publishes
Radiation attenuation depends on the isotope and photon energy. These are the values Prusa reports for this material — use them as a starting point, not a substitute for validating shielding in your own configuration.
1.402 mm
Half-value layer (HVL)
Measured at ⁹⁹ᵐTc, 140 keV
4 g/cm³
Density
High density — fewer meters per kg
75% W
Tungsten loading
Non-reactive, non-toxic heavy metal
Validate for your context: the HVL above is specific to one isotope and energy (⁹⁹ᵐTc, 140 keV). Shielding effectiveness varies with source, energy, part geometry and wall thickness, and 3D-printed parts can contain internal porosity. Prusa states the material is not suitable for sintering. Any shielding application must be independently verified and meet the relevant radiation-safety and regulatory requirements.
Where it goes to work
Industries & applications
Aimed at the whole radiation-shielding industry — anywhere custom, complex shielding geometry is faster to print than to machine.
Medical imaging & radiology
Custom X-ray and gamma shielding components. Non-toxic, hypoallergenic tungsten is a friendlier material to handle than lead in clinical settings.
Nuclear & energy
Bespoke shielding and fixtures for the nuclear-energy industry where complex geometry and quick turnaround matter.
Lab, NDT & imaging devices
Non-destructive testing, X-ray imaging equipment and lab shielding parts — and aerospace radiation-shielding use cases.
Print parameters
Prints on a desktop Prusa — with a hardened nozzle
Tungsten powder is highly abrasive, so a hardened steel nozzle is mandatory. Otherwise it prints at approachable temperatures on a textured or satin sheet; printing profiles for MK4 and XL are provided by Prusa.
260 ±10°C
Nozzle temperature
Hardened steel nozzle required
80 ±10°C
Heatbed temperature
Easy to print, easy to post-process
Textured / Satin
Recommended print sheet
Avoid smooth PEI (adheres too strongly)
The whole workflow, from one supplier
Printer, hardened nozzle, material — validated together
Tungsten powder is highly abrasive, so a hardened nozzle is mandatory, not optional — brass will wear out of tolerance fast. Beyond that it prints at approachable temperatures: nozzle 260 ±10 °C, heatbed 80 ±10 °C. Prusa publishes tungsten profiles for the MK4 and XL; on other Prusa machines our team will help you set one up.
01 · The machine
Original Prusa CORE One L+
At 260 ±10 °C nozzle and 80 ±10 °C bed, tungsten sits well inside the L+’s 290 °C / 120 °C envelope. Enclosed, it carries the heavier 4 g/cm³ spool without modification, and it ships with an abrasive-resistant nozzle in the box. Available to pre-order.
Buy the CORE One L+ →+
02 · The nozzle
Original Prusa Hardened Nozzle
At 75% tungsten by weight this is among the most abrasive filaments Prusa makes, so keep a spare hardened nozzle on the shelf. Nickel plating aids heat transfer and is rated to 300 °C — comfortably above this material’s 260 ±10 °C target.
Buy the hardened nozzle →+
03 · The material
Prusament PETG Tungsten 75%
Lead-free, non-toxic shielding filament at 4 g/cm³, made in-house to a guaranteed ±0.03 mm tolerance. A special-order material — we scope quantity, lead time and pricing with you.
Talk to an Expert →= one validated radiation-shielding workflow — sourced, supported and warrantied through a single US-based team.
A textured or satin sheet is recommended over smooth PEI. Shielding performance must still be independently verified for your source, energy and part geometry.
Designing a shielding part?
PETG Tungsten 75% is a premium, special-order material. Send us your geometry and shielding target — our US-based team will help you scope wall thickness, material and pricing. Safety data sheets, material certifications and origin documentation are available on request.