Model	Oxide addition		Impurites	Tungsten	Color	Standard
	Principal oxide	Contents
WT10	La₂O₃	0.8-1.2	≤0.1	Blalance		AWS A5.12 ISO6848 EN 26 848
WT15	La₂O₃	1.3-1.7	≤0.1	Blalance
WT20	La₂O₃	1.8-2.2	≤0.1	Blalance

Lanthanated tungsten electrode contains 0.8%0-2.2% lanthana, the electron workfunctionis 2 8eV-30eVIt's easy to start arc and sustain the stability at low current, it is mainly used in DC, performances well in Ac welding. Lanthana has better of creep resistance, strong ductility, lower stirring rate, therefore the tip temperature of lanthanated is lower, which helps to prevent grain from becoming larger, the service life of electrode can be increased substantially. The lifetime of lanthanated tungsten electrode is longer than thoriated tungsten electrode without overload current. It is particularly good at preventing thermal shock, When you ignite repeatedly in the welding of short cycle, it can be welded well and prevents from pollution. When welding the pipeline, welders are quite satisfied with this lanthanated tungsten, because the service time is long to reduce the downtime.