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Tungsten bars machined into welding electrode
What'Electrodes?
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte or a vacuum). The word was coined by the scientist Michael Faraday from the Greek words elektron (meaning amber, from which the word electricity is derived) and hodos, a way.
Tungsten Electrodes for TIG welding
Tungsten electrodes are used when arc welding with the Tungsten Inert gas (TIG) process or when plasma welding. In both processes the electrode, arc and weld pool are protected from atmospheric contamination by an inert gas. A tungsten electrode is used because it can withstand very high temperatures with minimal melting or erosion. Electrodes are made by powder metallurgy and are formed to size after sintering.
Tungsten electrodes are available in Thoriated, lanthanated, ceriated, and a few other varieties.
Type |
Brand |
Color |
Chemical Composition（％） |
Sizes
(mm) |
Surface |
Features |
Rare Earth |
Impurities |
W |
Pure
Tungnsten |
WP |
Green |
－ |
≤0.05 |
the rest |
0.8~15 |
D,E
G,S |
Non-radioactive;suitable for AC welding of aluminum, magnesium, and their alloy |
Thoriated
Tungsten |
WTh10 |
Yellow |
0.9~1.1ThO2 |
≤0.05 |
the rest |
0.8~15 |
D,E
G,S |
Excellent electron emission and overall performances; high current-carrying capacity; radioactivity; suitable for DC welding of carbon steel, stainless steel,nickel alloy and titanium alloy. |
WTh20 |
Red |
1.8~2.2ThO2 |
≤0.05 |
the rest |
0.8~15 |
Lanthanum
Tungsten |
WLa10 |
Black |
0.8~1.2La2O3 |
≤0.05 |
the rest |
0.8~15 |
D,E
G,S |
Non-radioactive;excellent electric conductivity and welding capacity; high current-carrying capacity; minimum ratio of burnt area; substitute for thoriated tungsten electrode; mainly used in DC welding. |
WLa15 |
Golden
Yellow |
1.3~1.7 La2O3 |
≤0.05 |
the rest |
0.8~15 |
WLa20 |
Blue |
1.8~2.2 La2O3 |
≤0.05 |
the rest |
0.8~15 |
Cerium
Tungsten |
WCe10 |
Pink |
0.8~1.2CeO2 |
≤0.05 |
the rest |
0.8~15 |
D,E
G,S |
Non-radioactive;easier arc initiation under low current circumstances, and low arc-maintaining current;suitable for the welding of pipelines,small components and discontinuous welding. |
WCe15 |
Orange |
1.3~1.7CeO2 |
≤0.05 |
the rest |
0.8~15 |
WCe20 |
Grey |
1.8~2.2CeO2 |
≤0.05 |
the rest |
0.8~15 |
Yttrium
Tungsten |
WY20 |
Sky
Blue |
1.8~2.2Y2O3 |
≤0.05 |
the rest |
0.8~15 |
D,E
G,S |
Non-radioactive;long and slim arc beam with high compression; deeper burning groove under medium and high current circumstances. |
Compound
Rare Earth
Tungsten |
WMX |
Cyan |
1.0~5.0MOx |
≤0.05 |
the rest |
0.8~15 |
D,E
G,S |
Compound rare-earth tungsten electrode; different additives contributing to better performance of tungsten electrode |
Note:D—As Drawn E—Electrolytic Polished G—Ground S—Swaged
More details, please visit tungsten electrodes.
So if you have any interest in this product, please feel free to email us: sales@chinatungsten.com or call us by: 0086 592 512 9696, 0086 592 512 9595.
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