Marking of tungsten electrodes
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According to standards EN 26848 all tungsten electrodes should have an alphanumeric designation. They are also identified by color. First letter W indicates tungsten, the second means is an oxide of a chemical element that is part of the.
The designation of oxides
— P — pure tungsten;
— L — lanthanum oxide;
— C — CeO2, Ce2O3;
— T — the oxide of thorium;
— Z — ZrO, ZrO2.
For example, 20 suggests that the composition of the electrode alloy oxide 2%. Sometimes referred to another number after a percentage of additives. It indicates the length of the tungsten electrode (in mm). Standard electrodes have a length of 50, 75, 150, and 175 mm.
|blue||WL 20||2% La2O3|
|black||WL 10||1% La2O3|
|yellow||WT 10||1% ThO2|
|purple||WT 30||3% ThO2|
|red||WT 20||2% ThO2|
|orange||WT 40||4% ThO2|
|gold||WL 15||A 1.5% La2O3|
|grey||WC 20||2% Ce2O3|
|white||WZ 8||0.8% of ZrO2|
Suitable for TIG welding of aluminum, Nickel and their alloys.
Welding bronze, Nickel, copper, titanium and and their alloys.
Tungsten electrodes this labeling is necessary for plasma welding, spraying AC and DC. They are perfect for work AC and DC on the details of high-alloy steel.
Additive to tungsten
|Mark||Additives||The purpose of alloying|
|VM||Si + Th||The growth temperature of recrystalization, increases the strength.|
|W||ThO2||The increase in the emission properties of tungsten|
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