Ceriated Tungsten Electrode WC20

Introduction

Ceriated tungsten electrode contains a cerium oxide additive. This type of tungsten electrode was launched in the 1980s with the gray electrode tip, it enjoyed a great popular by manufacturers after launching. No radioactive element is the main reason of the popular of cerium tungsten electrodes. It can be made through powder metallurgy and rolling grinding and polishing. Thanks to its small dimensions arc current, cerium tungsten electrode is mainly applied to welding process of pipes and stainless steel products.

Trademark

Cerium tungsten electrode is an alloy electrodes, which contains cerium oxide. The main content of cerium oxide is between 1.80-2.20%, so it is classified into the following grades.

Code	Impurity Content%	Other Impurity%	Electric Discharged Power
WC20	1.80-2.20	<0.20	2.7-2.8

Charateristics

Cerium tungsten electrode is mainly used to replace thoriated tungsten electrodes, which generally contains 2% cerium oxide. In the case of lower voltage, it is very easy to arc. Compared to pure tungsten electrode, cerium tungsten electrode has lower burn rate and evaporation rate. And these excellent properties will continue to increase depending on the content of cerium oxide. At low voltage, the life time is much longer. This electrode has no radiation, and has a lower melting rate with long life time. In addition, it also has some very outstanding chemical properties: small cathode spots, pressure drop, no burning.

Application

Because of the excellent properties of cerium tungsten electrode, it is mainly used in carbon steel, stainless steel, silicon, copper, bronze and other materials welding. Welded pipes often adopt cerium tungsten electrodes. All in all, the type of tungsten electrode is mainly used in DC welding. Since AC welding, cerium tungsten electrodes will be very prone to splitting.

Content

Cerium tungsten electrode mainly contains about 2% cerium oxide. Cerium oxide is an egg yolk or tan powder substance, mainly used for the glass industry additives. It has been developed to apply for glasses, optical lenses, CRT grinding of bleaching, ultraviolet radiation of glasses and electron beam absorbing.

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Lanthanated Tungsten Electrode WL20

Introduction

Electrodes by adding 1.8% -2.2% of lanthanum oxide into tungsten can be called as WL20 lanthanated tungsten electrode. It has the highest content of lanthanum oxide in all lanthanum tungsten electrodes, so its performance will be relatively improved. High content of lanthanum oxide can make the type of electrode quickly ignite the arc, such as welding rod, wire and so on.

Trademark

Because of high content of lanthanum oxide, WL20 lanthanated tungsten electrode is often used in place of thorium tungsten electrode, which has lanthanum oxide content of 1.80 to 2.20%. Content of other impurities is less than 2.0%. Although the content of lanthanum oxide are the highest among three lanthanum tungsten electrodes, but its tungsten content is relatively low. Electrode tip color is sky blue.

Code	Impurity		Other Impurities%	W%	Color
	Type	Content%
WL15	La2O3	1.80~2.20	<0.20	＞97.5	Sky Blue

Characteristic

Lanthanum tungsten electrode has 2% lanthanum oxide which may be one of the best tungsten electrodes to replace thorium tungsten electrode. Compared to thorium tungsten electrode, lanthanum tungsten electrode has a good arc characteristic, igniting in faster speed with a longer life. It is mainly used in AC and DC power inverter and transformer welding. Conductivity of lanthanum tungsten electrode is most closed, which is a two percent of thoriated tungsten electrode, having excellent welding effect.

Packing

Each tungsten electrode packed in plastic case, 10 to a plastic case, and its length is 150mm or 175mm, 1000 pieces per box. 

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Lanthanated Tungsten Electrode WL15

Introduction

Containing 1.3% to 1.7% lanthanum oxide of tungsten electrode can be the known as WL15 lanthanated tungsten electrode. W is the abbreviation of Wolfram, L represents lanthanum oxide. Its electrode tip color is golden yellow. Lanthanum oxide in the electrodes can extend its life, but at the time of delivery of lanthanum oxide, the operator must pass rigorous specialized training. It’s better to wear gas masks, safety glasses, anti-static overalls, rubber gloves and make other protective measures.

Trademark

Lanthanum tungsten electrode is used to replace thorium tungsten electrode in most applications. WL15 lanthanum tungsten electrode has lanthanum oxide content of 1.3% to 1.7%. Content of other impurities is less than 2.0%.

Code	Impurity		Other Impurities%	W%	Color
	Type	Content%
WL15	La2O3	1.3-1.7	<0.20	＞97.5	Golden Yellow

Characteristic

Electron work function of lanthanum tungsten electrode WL15 is 2.7-2.8eV, which is similar to thorium tungsten electrode, and the most important is that it has not radioactive damage. Compared to thorium tungsten electrode, this electrode arc performance and burning resistant will be better. Another advantage is that its durable current is high but the burn rate is very small, so the lanthanum tungsten electrode enjoys a great popular in Asia, Europe, America and Japan and other countries. Tests showed that conductivity of lanthanum tungsten WL15 is the closest to WL20 thorium tungsten electrode, welder can easily replace electrode without adjusting the parameters of the device.

Packing

Each tungsten electrode packed in plastic case, 10 to a plastic case, and its length is 150mm or 175mm, 1000 pieces per box.

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Lanthanated Tungsten Electrode WL10

Introduction

Adding 0.80 ~ 1.20% lanthanum oxide into tungsten can be called as WL10 lanthanated tungstenelectrode. Content of lanthanum oxide of lanthanated tungsten electrode is less but the tungsten content is the greatest, which can brilliantly resist thermal shock, even in excess of the current load it can be maintained working at a longer period. Its electrode tip color is black.

Trademark

Although WL10 lanthanum tungsten electrode only contains 1% lanthanum oxide, but it can improve the effect of welding to a certain extent. It has 98.4% tungsten, which cannot easily be oxidized and wore. Its color is black electrode.

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Thoriated Tungsten Electrode WT40

Introduction

Tungsten electrode is widely used in TIG or plasma arc welding which can also be called as wolfram electrode, which is a non-consumable electrode. Although WT40 thoriated tungsten electrode has radioactive element, because of this electrode material has efficient operation in the case of overload, so there are still a lot of companies will choose the WT40 electrodes.

Charateristic

WT40 thorium tungsten electrode contains 4% thorium oxide. Most of the thorium tungsten electrodes have good electron emission ability, and the electron work function is about 2.7eV, which can enhance combustion stability. Although a small amount of thorium oxide is a radioactive element and it is damage to the human body, but this type of electrode can improve the quality of welding electrode to some extent. Content of tungsten (>95.6%) is the lowest for all thorium tungsten electrode, but the content of thorium oxide is the highest, which is up to 4.20 percent. So its radioactivity will be a corresponding increase. Therefore, when using the electrode, welders should pay attention to take some protective measures.

Application

Because of the element thorium, WT40 thorium tungsten electrode is easier to promote arc, it often used in carbon and acid-resistant stainless steel welding process. This type of electrode can maintain arcing for a long time, thereby reducing contamination of the weld joint,. Thorium tungsten electrode is mainly used in DC welding. But before using, welders and other relevant staff should learn more about the relevant instructions of this type of electrode, or know a lot of information about radioactive knowledge, raise awareness of prevention.

Basic Parameter

Code	Impurity		Impurity Content%	Specificationsmm	W%	Color
	Type	Content%
WT20	ThO2	3.80-4.20	<0.20	Ø2.4 X150	＞95.6	Orange

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Thoriated Tungsten Electrode WT30

Introduction

Welding performance of thoriated tungsten electrode is one of the best electrodes of the tungsten electrodes, whose work function is relatively small. It can improve environmental pollution to some extent caused by welding, and it has a strong current carrying capacity, easily to arc with long life time. WT30 electrodes are silver-white metal rod, the electrode tip is purple.

Charateristic

Although rare earth thorium element of this type electrode is radioactive, because its radiological hazard belongs to a low one, so its welding performance will be better than the other alloy electrode, therefore, many users still choose to use thorium tungsten electrodes. Tungsten content of WT30 electrodes is larger than 96.5%. During welding, this type of electrode has an excellent energy-saving effect, the arc current relative decline 20-50%, thanks to low arcing current, it is hard to splashing.

Application

Thorium tungsten electrode is widely used in carbon and stainless steel. Thorium tungsten electrode has a strong electron emission, and its electron work function is generally at 2.7eV, with the large current density and stable arc burning, so it also used in DC of welding.

Basic Parameter

Code	Impurity		Impurity Content%	Specificationsmm	W%	Color
	Type	Content%
WT20	ThO2	2.80-3.20	<0.20	Ø2.4 X150	＞96.5	Purple

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Thoriated Tungsten Electrode WT20

Introduction

Introduction

According to 2% thoriated oxide content, the type is classified as WT20 of thoriated tungsten electrode. It is a metal bar with silver-white, and its tip is red. Compared to other types of electrodes, the ratio of thoriated tungsten electrode in the domestic market is the largest. Thoriated oxide content of 2% (WT20) thoriated tungsten electrode has a better operating performance than other thoriated tungsten electrode.

Charateristic

Current-carrying capability of thorium tungsten electrode WT20 is stronger than pure tungsten electrode, it is about 20 percent. In addition, it has a low work function, so that it can reduce pollution caused by welding. On the other hand, the WT20 electrode is easy to arc and a more stable arc.

Application

Because of the excellent characteristics of tungsten, the thoriated tungsten electrode WT20 is very suitable used in TIG welding, or similar electrode material. However, in the use of thorium-tungsten electrode, it should be grounded and cut. If used improperly, it can cause arcing drift, and split, resulting in consuming more money. What’s more, there is a certain risk. Add rare earth oxide in tungsten metal, which can stimulate the electron work function, thereby improving its welding performance.

Basic Parameter

Code	Impurity		Impurity Content%	Specificationsmm	W%	Color
	Type	Content%
WT20	ThO2	1.70-2.20	<0.20	Ø2.4 X150	＞97.5	Red

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Thoriated Tungsten Electrode WT10

Introduction

Thoriated tungsten electrode can be divided into WT10, WT20, WT30, and WT40 depending the content of thorium oxide. Different trademarks have different color of their tips. The tip of the WT10 thoriated wolfram electrode thorium is yellow.

Charateristic

Because of the good current capacity of thorium tungsten electrode WT10, and a low work function, it is easier to arc and it has a longer life time. The welding performance of thorium tungsten electrode WT10 is superior to the pure one. Its tungsten content is more than 98.4% and it has the highest content of tungsten in all wolfram electrodes.

Application

Thanks to excellent combination performance, especially powerful current carrying performance, thorium tungsten electrode is mainly used in DC welding for steel, stainless steel, nickel alloys and titanium. While WT10 tungsten thorium electrode welding, its electrode tip can keep cuspidal, so it is widely used in welding steel pipe under a direct current.

Basic Parameter

Thoriated tungsten electrode is mainly used in DC negative electrode or carbon, stainless steel, nickel alloy, titanium alloys and other positive electrodes. Generally speaking, 2% thoriated oxide content of thoriated tungsten electrode than 1% of the amount of thoriated tungsten electrode has a better performance.

Code	Impurity		Impurity Content%	Specificationsmm	W%	Color
	Type	Content%
WT10	ThO2	0.80-1.2	<0.20	Ø2.4 X150	＞98.4	Yellow

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