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 stiff grades even exceed lead or substitute tungsten heavy metals. It 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

Temperature 3Chemicals 3Strength 3Toughness 2Dimensional stability 4Printability 2

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

PropertyValueSource
Material classPolyamide 6, tungsten filledgrade designation
Tungsten content93 – 97 wt.%TPT, data request 09/2026
Density10 – 13 g/cm³ (grades N10 / N12 / N13)TPT data sheet
Flexural strength (ASTM D790)119 – 136 MPaTPT data sheet
Flexural modulus (ASTM D790)11,100 – 18,900 MPaTPT data sheet
Izod notched (ASTM D256)70 – 84 J/mTPT data sheet
HDT A, 1.8 MPa (ISO 75)160 °CTPT, data request 09/2026
Mould shrinkage0.4 – 0.9 %TPT data sheet
Drying before processing90 °C, 3 hTPT, data request 09/2026
Halogen-freeyes, halogen-freeTPT, data request 09/2026
RoHScompliantTPT, 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 radiation 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
  • Wall thickness only possible above 0.5 mm
  • 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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