Pellets · Bosch pellet printer Limited processability

PA-W

TPT · Poly-Tungsten

A tungsten-filled polyamide 6 with exceptionally high density: 10 to 13 g/cm³ depending on the grade – the densest grades even exceed lead. Where lead or brass would otherwise be used, this allows mass to be placed deliberately and in almost any geometry – without a foundry and without machining.

Limited processability

We can process this material – for prototypes, visual and design samples and lightly loaded parts. It is currently not qualified at our site for load-bearing functional parts. We are working on solutions to increase the strength and load-bearing capacity of printed parts made from this material in the future. Talk to us – we assess your part individually.

Property profile

Rated 1 to 5 relative to the other materials in our range. This is an experience-based orientation aid, not a measured value – the hard numbers are in the table below.

Technical data

Property	Value	Source
Material class	Polyamide 6, tungsten filled	grade designation
Tungsten content	93 – 97 wt.%	TPT, data request 09/2026
Density	10 – 13 g/cm³ (grades N10 / N12 / N13)	TPT data sheet
Flexural strength (ASTM D790)	119 – 136 MPa	TPT data sheet
Flexural modulus (ASTM D790)	11,100 – 18,900 MPa	TPT data sheet
Izod notched (ASTM D256)	70 – 84 J/m	TPT data sheet
HDT A, 1.8 MPa (ISO 75)	160 °C	TPT, data request 09/2026
Mould shrinkage	0.4 – 0.9 %	TPT data sheet
Drying before processing	90 °C, 3 h	TPT, data request 09/2026
Halogen-free	yes, halogen-free	TPT, data request 09/2026
RoHS	compliant	TPT, data request 09/2026

These values are taken from the manufacturer datasheet and apply to the material, not to the printed part. In 3D printing the achievable properties depend on part orientation, layer height and process parameters – in the Z direction in particular they are lower. Please talk to us before relying on them for design.

“Qualified for functional parts” is a general classification. A functional part can be a simple clip or a main load-bearing member – the forces and load cases differ fundamentally. We therefore always assess in each individual case whether a material is suitable for your part.

Source: TPT – Tungsten Powder Technology, data sheet Poly-Tungsten (TPT N10 / N12 / N13), supplemented by a data request from ZIKO Technik · typical values on injection-moulded specimens; tensile data are not available from the manufacturer

Strengths

Very high density with freely designable geometry
Lead-free alternative for shielding and balancing weights
Mass can be placed exactly where it needs to act
Good vibration damping thanks to the high mass loading

Limitations

Strongly abrasive – requires hardened nozzles and markedly increases wear
Tensile values are not available from the manufacturer
High part weight, which has to be allowed for in handling
Comparatively expensive

Typical applications

Balancing weights and counterweights
Radiation shielding as a lead-free alternative
Vibration-damping elements
Ballast in test and experimental rigs

Produced on: Bosch pellet printer — More about this machine

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