What is Elkonite?

ELKONITE® is the registered trade mark of CMW used to identify a group of metal compositions whose elements consist basically of the refractory metals tungsten, molybdenum and tungsten carbide combined with copper.

What is tungsten copper used for?

Tungsten copper (WCu) materials are used for arcing contacts in SF6 circuit breakers for high and medium voltage applications. At the heart of the switching chamber, WCu arcing contacts are exposed to extreme mechanical and thermal stresses.

Is tungsten more conductive than copper?

The high thermal conductivity of copper together with the low thermal expansion of tungsten allows thermal expansion matching to silicon, gallium arsenide, and some ceramics. When the contact is very fine grained (VFG), the electrical conductivity is much higher than a normal piece of copper tungsten.

Is Tungsten Copper Magnetic?

Copper Tungsten Alloy Consisting of pure tungsten (W) powder suspended in a matrix of copper (Cu), these alloys are readily machinable and known for good thermal and electrical conductivity, low thermal expansion, being non-magnetic, good performance under vacuum, and resistance to erosion from arcing.

Is Tungsten a composite?

Although called a hard metal, Tungsten Carbide is actually a composite material with hard particles of Tungsten Carbide embedded in a softer matrix of metallic Cobalt .

What is the difference between copper and tungsten?

Copper is better conductor than tungsten. Tungsten has high resistance. Hence it is used in making of filament of bulb. Copper has least resistance.

Why is tungsten embedded in copper?

Some studies have shown that the use of nanoscale tungsten particles coated onto copper powder and a lower sintering temperature can improve the density of the final material, thus reducing the risk of pores, copper lakes, and tungsten agglomerates.

What is the hardest alloy metal?

What Are the Strongest and Hardest Metals?

  • The Strongest Natural Metal: Tungsten. As far as pure metals go, tungsten has the highest tensile strength, with an ultimate strength of 1510 megapascals.
  • The Strongest Alloy: Steel.
  • The Hardest Metal: Chromium.
  • The Most Useful Strong Metal: Titanium.

What are Elkonite and Elkon alloys used for?

Elkonite® alloys are commonly used in electrical & electrical / thermal applications. They are used for facing and inserts for flash and butt welding dies, projection welding electrodes, seam welding bearing inserts, facing for electro-forming & electro-forging dies, and EDM electrodes.

When to use Elkonite for volume projection welding?

Elkonite® 30W3 Tungsten-Copper and Elkonite® TC10 Tungsten Carbide-Copper alloys are recommended for volume projection welding dies where the pressures involved are relatively high. Electrical upsetting of non-ferrous metals and low carbon steel is usually accomplished by the use of such Elkonite® materials as die facings.

What kind of welding dies are Elkonite used for?

Elkonite® 5W3 Tungsten-Copper and Elkonite® TC5 Tungsten Carbide-Copper alloys are normally used for light duty projection welding dies where welding pressured are not extreme.

When to use Elkonite 1W3 or 3W3?

Elkonite® 1W3 and Elkonite® 3W3 Tungsten-Copper alloys are generally used for flash and butt welding die inserts where higher electrical and thermal conductivity is necessary and where a degree of malleability is desirable.