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Copper/Tungsten electrical contacts Copper/Tungsten electrical contacts
Electrical contacts with Copper/Tungsten sintered parts Electrical contacts with Copper/Tungsten sintered parts
A selection of Celsia's electrical contacts A selection of Celsia's electrical contacts
A Copper/Tungsten detail of a silvered moving contact A Copper/Tungsten detail of a silvered moving contact
Different types of silvered main contacts Different types of silvered main contacts
Commutating contacs with sintered parts in different shapes Commutating contacs with sintered parts in different shapes
Copper/Tungsten sintered rings, cups, round and square bars Copper/Tungsten sintered rings, cups, round and square bars
A detail of a copper/tungsten cup, laser marked A detail of a copper/tungsten cup, laser marked

Sintered components in copper tungsten and silver tungsten, distinguished by:

  • The high thermal and electrical conductivity of copper, combined with the arc-resistant properties of tungsten, offer greater resistance to temperatures and mechanical stress.
  • The pressing, infiltration and sintering processes guarantee a high level of homogeneity and a fine grain microstructur of the final product. This ensure longer product life in comparison, even in the most severe applications.

Our range of sintered components differs in terms of the composition of the infiltrated materials and the relative technical characteristics:

Density: from 14.20 to 15.70 g/cm²
Conductivity: from 43 to 55% IACS
Thermal conductivity: from 185 to 210 w/mk
Brinell hardness (2.5 – 187.5): from 180 to 225 HBW
Rockwell hardness (Diamond – 60 kg): from 55 to 59.9 HRA
Grain size: 4 – 6 µm
Softening temperature: from 920 to 980° C
Thermal expansion coefficient: from 7 to 11 (10-6 °C-1)

We are available to consider the production of sintered components with different technical characteristics and compositions, based on specific customer enquiries.

Thanks to the unique properties of the materials, our sintered components are suitable for use in many fields of application:

  • Electrical contacts for medium and high-voltage switches and circuit breakers;
  • Production of electrowelded wire mesh;
  • Diamond tools sharpening;
  • Arc welding;
  • Stainless steel welding;
  • Die-sink EDM.

Celsia has been operating in the production of sintered components in copper tungsten and silver tungsten for more than fifty years. In recent years, in response to new market demands, they have also started to specialise in the production of copper chromium components for medium voltage vacuum switches.

Celsia is located in North Western Italy in the Verbano Cusio Ossola, in an area highly specialised in mechanical machining.
It is a few km from the Swiss border and is easily reachable from Milan Malpensa Airport.

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