Wolfram industrie manufactures witstar tungsten electrodes.These electrodes contain no radioactive materials and so it is environmental friendly and also welder friendly.Thoriated tungsten electrodes contain thorium which cause radiation.Tig welder can suffer radiation exposure of 15-20 msv per annum and lungs are the most severely affected organ.The international commission for radiation protection icrp/60, 91 recommends a maximum exposure of 20 msv per annum. It is very important to provide effective extraction facilities for grinding dust and ventilation of workplace to remove welding fumes.The rare earths used in the manufacture of witstar grade ws 2 electrodes ensure: reliable arc striking; reduced burn off rate; prolonged service life; high quality of arc. Which provide an excellent foundation for total stability throughout the welding process. In assessing arc-striking characteristics it not only the ignition properties of a new electrode that are important but also the re-ignition properties of an electrode that has been in use for more than 30 minutes. The reliability of ignition was evaluated on the basis of the frequency of misfire [interruption of the arc with an ignition delay of =250 ms] witstar ws 2 electrodes have turquoise colour code.
