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Quality
We have been following Total Quality Management system in order to provide our clients with defect free and world class quality products. The specialization of our company lies in manufacturing Tungsten Discs, Tungsten Contact Rivets, etc. using best quality raw materials. We source raw material from only reputed and well established vendors. Moreover, beginning from the initial stage of material sourcing till the final production stage, all the activities are under strict vigilance of our expert quality controllers. Also, we are equipped with complete testing facility comprising inspection & quality control instruments and tools that help us in ensuring no loopholes in quality assurance process. We are proud to be an ISO 9001:2008 certified company by Intertek-Systems.

WHY TUNGSTEN ?

Tungsten is a very hard metal with following physical properties:

  • High melting and boiling point â€Â“ highest of all the metals
  • Excellent resistance to wear and tear
  • Excellent resistance to welding, sticking and material transfer
  • High electrical conductivity

Having the above above properties, tungsten is primarily used in high-frequency switching applications like automotive ignition system and horn contacts. On being exposed to air, Tungsten Contacts form oxide layer, the thickness of which may reach up to 50Ã… (1Ã… = 1x10-10meter). When a high contact force is used, most of the oxide layers are broken, and current flow (electron tunneling) takes place with tungsten contacts and the device starts functioning. Force of 0.500 kgf for more is commonly applied in devices using tungsten contacts. During arcing, as in the case of other composite contact materials, the tungsten will be oxidized under the heat of arc.

Tungsten contacts are very popular and widely used for high frequency switching operations, like 100-500 cycles/second. It has low electrical erosion, but is not considered good for carrying high currents for long periods in the closed position. If high currents are passed, it can lead to high heating in the current constriction area. This result in oxide build-up and without mechanical wiping movement of the contacts, high resistance can result with device overheating and/or device failure. Current range of 1 to 5 Ampere is common. Tungsten for contact application is generally made by powder metallurgical process.

Tungsten Contacts specifications:

Material

Symbol

Composition (wt %)

Conductivity (m/Ohm.mm 2)

Hardness HV (Kg/mm2)

Tungsten

W

100

13

400