Red-tipped thoriated Tungsten Electrodes contain radiotoxic thoria and can therefore be dangerous to health if exposed to it.
To overcome the accumulated hazardous thoria conditions, the blue-tipped MultiStrike® Tungsten Electrodes available in the USA from COB Industries contain a mix of non-radioactive rare earth elements, designed to eliminate the risk to health posed by radiotoxic thoriated Tungsten Electrodes.
MultiStrikes® can be used for welding aluminium with the AC process, as well as steels and alloys with the DC process, which is designed to allow the welder to have just one type of Tungsten Elec-trode to weld all materials and reduce the amount of stocks and purchasing requisitions.