The Type WT 40 'orange' consists of 96% tungsten and 4% radiant thorium. WT-40 is a non-standard electrode for DC welding applications and is not suitable for AC welding.

The thorium content causes (like all oxides) a reduction in the electron work function and thus a higher electron emission. With increasing thorium, ignition - durability - current capacity is improved. The main application is the direct current welding of high and stainless steels. 

Diameter: 1.0-12mm

Length: 50mm, 75mm, 150mm, 175mm and any length requested from customer.