Sharpened Tungsten Needle

The tungsten needle with the tip that sharpened is mainly used for the instrument probe using. Such as, digital four probe tester, the device is multi-purpose measuring equipment using four point probe measurement principle.

The sharpened tungsten needle is a non radioactive material, whose electron emission ability is higher than thorium tungsten material, and its arcing voltage is low, arcing is stable. The positive polarity, the allowable current density is higher than thorium tungsten of 5%-8%; AC allowable current density is high, and its service life is long, which is suitable for DC or AC electric welding, what’s more, if the using time is the same with thorium tungsten, its service life is longer. Usually, it is used for the welding of carbon steel, stainless steel, titanium and other metals.



 

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