WT WC WL Tungsten Products Tungsten Electrodes / TIG Electrodes for TIG Welding
Tungsten is resistant to corrosion when the humidity is below 60%. However, it must be protected at elevated temperatures. Tungsten can oxidize in the presence of oxidizing gases at temperatures above 250° C. Despite this vulnerability, Molten glass, nitrogen, inert gases, molten metals and ceramic oxides only slightly affect it.
Thoriated Tungsten Electrodes
Thoriated tungsten is the most commonly used tungsten material, Thoria is a low-level radioactive material, but it was the first to display a significant improvement over pure tungsten.
Thoriated tungsten is a good general use tungsten for DC applications, because it operates well even when overload with extra amperage, thus improves the performance of welding.
Cerium Tungsten Electrodes
Cerium Tungsten Electrodes have good starting arc performance under the condition of low crrrent. The arc current is low, therefore the electrodes can be used for welding of pipe,stainless and fine parts. Cerium-Tungsten is the first choice for replacing Thoriated Tungsten under the condition of low DC.
Lanthanated Tungsten Electrodes
The lanthanated tungsten became very popular in the circle of welding in the world soon after it was developed because of its good welding performance. The electric conductivity of lanthanated tungsten is most closed to that of 2% thoriated Tungsten. Welders can easily replace thoriated tungsten Electrode with lanthanated tungsten electrode at either AC or DC and not have to make any welding program changes. The radioactivity from thoriated tungsten can thus be avoided. Another advantage of lanthanated tungsten is being able to bear high current and having the lowest burn-loss rate.
Zirconiated Tungsten Electrodes
Zirconiated tungsten has good performance in AC welding, especially under high load current. Any other electrodes in terms of its excellent performance can not replace Zirconiated tungsten electrodes. The electrode retains a balled end when welding, which results in less tungsten permeation and good corrosion resistance.
Our technical staffs have been engaged in research and testing work and succeeded in solving the conflicts between zirconium contents and processing properties.
Pure Tungsten Electrodes: Suitable for welding under alternating current;
Yttrium Tungsten Electrodes: Mainly applied in military and aviation industry with narrow arc beam, high compressing strength,highest welding penetration at medium and high current;
Composite Tungsten Electrodes: Their performances can be much improved by adding two or more rare Earth oxides which are mutually complementary. The Composite Electrodes have thus become out of the ordinary in the electrode family. The new type Composite Tungsten Electrode developed by us has been listed in Stade Developing Plan for new products.
Specifications of Tungsten Electrodes for TIG Welding:
|
Trade mark |
Added |
Impurity |
Other |
Tungsten |
Electric |
Color |
|
WT10 |
Th02 |
0.9-1.2 |
< 0.20 |
The rest |
|
yellow |
|
WT20 |
Th02 |
1.7-2.2 |
< 0.20 |
The rest |
|
Red |
|
WT30 |
Th02 |
2.8-3.2 |
< 0.20 |
The rest |
|
Purple |
|
WT40 |
Th02 |
3.8-4.2 |
< 0.20 |
The rest |
|
Orange |
|
WC20 |
CeO2 |
1.80 - 2.20% |
<0.20% |
The rest |
2.7 - 2.8 |
Grey |
|
WL10 |
La2O3 |
0.80 - 1.20% |
<0.20% |
The rest |
2.6 - 2.7 |
Black |
|
WL15 |
La2O3 |
1.30 - 1.70% |
<0.20% |
The rest |
2.8 - 3.0 |
Yellow |
|
WL20 |
La2O3 |
1.80 - 2.20% |
<0.20% |
The rest |
2.8 - 3.2 |
Sky blue |
|
WZ3 |
ZrO2 |
0.20 - 0.40% |
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