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Prusament PETG Magnetite 40%

Ref.: PRUSA-PETG-MAG-GREY-175-1000

41.31 €

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Prusament PETG Magnetite 40% is a technical 3D printing filament developed by Prusa Research and manufactured in-house under strict quality controls. This PETG filament reinforced with 40% magnetite powder offers paramagnetic properties, making it an ideal choice for industrial, electronic, and functional applications. The material is available in gray color, with a characteristic texture that reflects its high mineral content.

Designed to deliver consistent performance, this reinforced filament for 3D printing guarantees a dimensional accuracy of ±0.03 mm, exceeding conventional industry standards. Each spool can be individually verified thanks to the online traceability system, which allows users to check parameters such as filament diameter, color consistency, and specific mechanical properties.

Video 1: A user creates a radiation shield using Prusa's PETG Magnetite.

PETG Magnetite 40% excels in technical applications such as the production of switches, sensors, potentiometers, induction loops, electromagnetic shielding, and components compatible with magnetic fields. It is also useful for tools attachable with magnets, parts with added weight, functional decorative elements, or magnetic toys. Its composition facilitates use in professional 3D printing without compromising the thermal stability or mechanical strength typical of conventional PETG.

Features, Advantages and Disadvantages of Prusament PETG Magnetite 40%

Prusament PETG Magnetite 40% is especially useful for applications requiring an aesthetically appealing finish and partial magnetic properties, but it also presents some challenges regarding layer adhesion and printing requirements. Below are its main advantages and disadvantages, which provide a better understanding of its applications and limitations.

Features of Prusament PETG Magnetite 40%
Pros	Paramagnetic material. High density (heavy material). Visually attractive matte black surface.
Cons	Requires a hardened nozzle. Lower layer-to-layer adhesion compared to pure PETG. Cannot be turned into a permanent magnet under household conditions.

Thanks to its excellent balance between functional properties and ease of printing, this paramagnetic filament is an advanced solution for sectors such as electronics, engineering, industrial design, technical education, and robotics. Prusament PETG Magnetite 40% offers reliability, precision, and unique features that expand the possibilities of high-performance 3D printing.

Video 2: Introduction to the filaments developed by Prusa Research.

General information
Material	PETG
Format	1 Kg
Density	(ISO 1183) 1.82 g/cm³
Filament diameter	1.75 mm
Filament length	228.4 m

Printing properties
Printing temperature	270 ºC
Print bed temperature	100 ºC
Cooling fan	10-20%
Recommended printing speed	Up to 100 mm/s

Mechanical properties
Charpy impact strength	(ISO 179-1) 4.8 KJ/m²
Elongation at break	(ISO 527-1) 3.9 %
Tensile modulus	(ISO 527-1) 2.0 MPa
Flexural strength	(ISO 178) 72.8 MPa
Flexural modulus	(ISO 178) 72.8 MPa
Surface hardness	(Prusa Polymers Shore D) 82

Thermal properties
Heat deflexion temperature	(ISO 175 0.45 MPa) 90 ºC

Other
HS Code	3916.9

The Prusament PETG Magnetite 40% filament, manufactured by Prusa Research, is a technical material with paramagnetic properties, ideal for functional parts and electronic components. To achieve optimal printing results, it is essential to follow precise settings and ensure proper print surface preparation.

The extruder temperature should be maintained around 270 °C (±5 °C), while the bed should be set between 90 °C and 110 °C. This filament performs best on textured or satin steel sheets, as smooth surfaces may cause excessive adhesion, potentially damaging the PEI sheet when removing the part. To avoid this, it is recommended to apply a thin layer of PVA glue as a separating agent when using smooth sheets.

Surface preparation is essential: dirt or grease residues affect adhesion. The surface must be cleaned with isopropyl alcohol (at least 90%) and an unscented paper towel. This routine should be followed before almost every print to ensure good first layer adhesion.

PETG Magnetite filament must be stored in appropriate conditions to avoid moisture absorption, as this can negatively affect print quality. If needed, it can be dried following the specific recommendations available in Prusa’s technical documentation, available under the Attachments tab.

After printing, it is important to wait until the bed and part have completely cooled before removing the model. This prevents the use of tools that could damage the sheet and allows for clean and safe removal.

For more details on material compatibility and surface preparation, it is recommended to consult the Prusa Research material table and the steel sheet maintenance guide.