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Plansee Tungsten Alloys

Plansee Tungsten Alloys is the first choice for tungsten-based composites and alloys (W-based Metal Matrix Composites/W-MMC). The custom-designed components made of these materials are particularly dense, corrosion-resistant, and mechanically workable.

Our core competences at Plansee Tungsten Alloys:

  • From the raw material to the ready-to-install component
  • Top product quality from a single source for the most stringent requirements
  • Development and optimization of alloys in a state-of-the-art research laboratory by a dedicated development team
  • Densimet®, Inermet®, and Denal® tungsten composites
  • Sparkal® tungsten-copper composite
  • Highest quality tungsten alloys
France, Saint Pierre en Faucigny

Plansee Tungsten Alloys, la marque de CIME BOCUZE S.A.S.

446 Avenue des Digues74800 Saint Pierre en Faucigny
Tel:+33 4 5025 3700Fax: +33 4 5025 7642
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At a glance

    Details of our products:

    Everything from a single source

    From powder to the final product

    We do everything ourselves when it comes to the production and processing of our composites. The production of our unbeatable products begins with mixing the high-quality powders. Depending on the product application, we use optimized pressing technologies such as CIP or drybag pressing and compress our material by means of subsequent sintering or liquid phase sintering. We manufacture our tungsten-copper composites by means of infiltration. In the case of special product requirements, we forge our materials to ensure maximum strength. We also perfectly handle the further processing and the manufacture of complex components, producing individual components in sizes of up to 1,200 mm in length and 420 mm in diameter. Our tried-and-tested quality management system enables process monitoring, product tracking, and continuous improvement.

      Mixing alloys
      Heat treatment
      Mechanical processing
      Quality assurance
    OxideMolymet (Chile) is the world's largest processor of molybdenum ore concentrates and our main supplier of molybdenum trioxide. The Plansee Group holds a 21.15% share in Molymet. Global Tungsten & Powders (USA) is a division of the Plansee Group and our main supplier of tungsten metal powder.
    Material and product properties

    Our W-MMC materials

    We at Plansee Tungsten Alloys specialize in tungsten-based composites, so-called W-based Metal Matrix Composites, which have particularly special properties:

    • Our Densimet® and Inermet® tungsten composites have a particularly high density (17.0 to 18.8 g/cm3) and reliably shield X-rays and gamma rays. They are not susceptible to expansion in the presence of heat and are particularly good at dissipating heat. As mold inserts for aluminum foundries, they can be repeatedly heated and cooled without becoming brittle. They are also used as balancing weights.
    • The tungsten composite Denal® is particularly strong and impresses with its high tensile strength with sufficient expansion.
    • Our tungsten-copper composite Sparkal® is used in applications in which copper and graphite reach their limits. Wear-resistant tungsten-copper electrodes can even be used to machine carbide without any problems.

    The advantages of our materials at a glance

    From the ore powder to the final product
    • High density of 17.0 to 18.8 g/cm3 (similar to pure tungsten)
    • Better workability than pure tungsten
    • Cost-efficient manufacture of complex products and components
    • High modulus of elasticity, very good mechanical properties
    • High absorption capacity for X-rays and gamma rays
    • Safe for human health and the environment
    • High wear resistance
    • Good thermal conductivity

    Further details regarding these special properties can be found in the materials area:

    To the W-MMC material page

    Our promise of quality

    UTC Supplier Gold



    Our quality management system for our aviation and aerospace business activities is certified according to ISO 9001:2015 & EN/AS 9100:2015. In July 2017, PTA was awarded the "Supplier Gold" status by Collins for its excellent services. In March 2017, our environmental management system was certified according to ISO 14001:2015.

    To the ISO 9001/9100 certificate