Cerium Tungsten Electrodes and Thorium Tungsten Electrodes - Arc Performance Comparison

By compare arc performances, it was determined that thorium tungsten cathode pressure is small than cerium tungsten, 2% Tn-W13.0V, 2% Ce-W12.0V. The service life is related with cathode spot. In xenon stroke light compared these two electrodes found, cerium tungsten end face has slight cathode spot and has smaller loss, and the service life is longer than thorium tungsten. In emission current density, cerium tungsten arc column euphotic belt is bright and long and emission current density is higher than thorium tungsten. When the diameter is large, the minimum arc stability of various electrodes is similar, with the reduction of diameter, the cerium tungsten electrode arc performance is good than other electrodes. The lowest arc voltage of cerium tungsten is 12V, thorium tungsten arc voltage is 30V, so cerium tungsten arcing is more simple.

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Cerium Tungsten Electrode and Thorium Tungsten Electrode - Material Properties Comparison

Compared with thorium tungsten electrode on material properties, the work function and α-ray dose of cerium tungsten electrode are lower than thorium tungsten electrode, which has better performance advantages and no radiation. Under the same cutting conditions, when the nozzle is leakage, thorium tungsten electrode wear has significantly increased, but little change in cerium tungsten electrodes. This phenomenon also happen in gas discharge lamp, when the oxygen content increase, cerium tungsten electrode has slight change, which can be seen it has good antioxidant properties.

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Binary Composite Tungsten Electrodes

In the binary composite tungsten electrodes, W-La-Ce electrode has lower arc voltage and at low current conditions, it has good arc stability. W-Y-Ce electrode composite electrode has best arcing and anti-burning properties. Besides, it has good arc stability and has large thermal power. W-La-Y has similar arc performance with W-La-Ce electrode and W-Y-Ce electrode, but it has large thermal power is larger, so large current anti-burning properties is lower than W-La-Ce electrode and W-Y-Ce electrode.

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Doped Tungsten Electrode Properties

Tungsten electrode doped with two rare earth oxides (binary composite tungsten electrode) usually produces by powder metallurgy method and binary composite tungsten electrodes include W-La₂O₃-Y₂O₃, W-La₂O₃-CeO₂, and W-Y₂O₃-CeO₂. Comparing composite tungsten electrode’s physical property of welding arc with tungsten electrode doped with one rare earth oxides and thorium tungsten electrode can well understand composite electrode performance. After comparison, binary composite rare earth tungsten electrode properties are better than thorium tungsten electrode and tungsten electrode doped with single rare earth oxide.

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Factor Influencing Rare Earth Tungsten Electrode - Drawing and Processing

Considering the higher recrystalization temperature of rare earth doped tungsten electrode, its drawing and processing require higher temperature. During this process, rare earth actually is negative for electrode recovery and recrystalization. Larger deformation, lower processing temperature. The decreasing extent should be much larger than pure tungsten electrodes drawing.

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Factor Influencing Rare Earth Tungsten Electrode - Sintering

Sintering process is the next step after powder is made. Tungsten electrode blank bar is made after sintering. Appropriate temperature is main factor to assure keeping rare earth can sinter together with tungsten bar. Also, in this process, the temperature has been significant.

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Factor Influencing Rare Earth Tungsten Electrode - Reduction of Powder Size

The grain size and distribution during reduction of rare earth powder and tungsten powder will also influence the quality of rare earth tungstenelectrode. Because of adding rare earth nitrate into APT, its reduction temperature is higher than the APT itself. The grain size is mainly controlled by the boat loading capacity and temperature difference in the reduction furnace. Good control of the temperature can reduce out better size of rare earth doped tungsten powder.

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Factor Influencing Rare Earth Tungsten Electrode - Uniformity of Rare Earth Doping

Rare earth tungsten electrode is electrode doped with rare earth, including doping one element, two elements and three elements or more. Manufacturing process and the raw material will influence electrode quality.

Solid-liquid sintering is a good choice for uniform doping to produce tungsten electrode. Raw materials are APT (ammonium paratungstate) and rare earth nitrate. The doping process is to make nitrate mixing with APT together, which is benefit for the later decomposition of rare earth and doped into tungsten crystal to reach a result of uniform doping.


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High Purity Tungsten Granule

High purity tungsten granule refers to highly pure tungsten-based flux. Metal tungsten is processed into fine particles, particle size 20-40 mesh with high purity of 99.99%. It mainly applied in the high-frequency infrared carbon and sulfur analyzer and the results are very stable. Currently combustion method to measure the carbon and sulfur, many factors affect the stability of the analysis results. Wherein the flux has a greater impact on the measurement results of the stability samples. Select the appropriate flux, adding an appropriate amount will accelerate the oxidation of the molten sample, it can increase the rate of release of carbon and sulfur.

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Tungsten Granule

Tungsten granule is made of pure tungsten material with irregular particles. Tungsten granule is also called tungsten flux, tungsten accelerator, and tungsten granulate. The purity of tungsten granule can reach 99.90% or 99.95%min. The color of tungsten granule is metal bright. Tungsten granule is mainly in welding rod, carbon sulfur analysis, weight filler, radiation shielding filler,welding fitting, induction accelerator, etc.

The most popular size of tungsten granule is -20~+40mesh.  

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Tungsten Accelerator

Tungsten accelerator is a kind of flux made of tungsten, by using burning method to test carbon and sulfur contents. During testing, the accelerator will increase its oxidization degree, and provide sample enough heat, make the burning stable. Meanwhile, it will cover the sample and prevent sample from splashing. The using quantity of accelerator should be proper, so that the CS releasing rate and testing value can be improved.

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Tungsten Flux

Tungsten flux, also known as tungsten granule, is the processing of tungsten metal into small particles, particle size 20-40 mesh, high purity above 99.95%, so it also called pure tungsten flux. High purity tungsten particles flux is also essential in the analysis of the infrared carbon and sulfur reagents. Tungsten flux has the function of heating, regulating medium pH, mixing, catalyzing, combustion stability, anti-jamming. Raw materials are billet and tungsten powder. Generally tungsten bar is used in the production of tungsten wire. Tungsten flux is better made of FW-1 tungsten powder, its carbon and sulfur blank value is low with less volatile compounds, but the price is high.

Tungsten flux is mainly applied to analyze combustible in infrared carbon and sulfur analyzer, and the machine is also called CS analyzer, C&S analyzer. With its property of high density, tungsten granule can be oxidized under high temperature, and emits heat, which will show its high heat and quick response. It helps reduce the melting point of the combustible to promote the release of carbon and sulfur. It also used as carbon and sulphur fluxing agent during steelmaking.

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Tungsten Electrode Holder

Tungsten electrode holder is also known as tungsten needle holder, tungsten rod clips, clamps, gun holder, tungsten clip, and clamp. During welding, it can clamp electrode to avoid falling. Electrode holder is composed of into the clamp and a jacket. Clamp is copper material, while the jacket is a plastic material, the two may be used in combination.

Generally speaking, the electrode is used in a jacket, flow guide or copper head. Specifications need to match with specifications of electrodes. Conventional electrode sizes are Ø1.6mm, Ø2.4mm and Ø3.2mm, so the size of the tungsten electrode holder may also be given in accordance with the diameter of these specifications. Special specifications are Ø4.0mm, Ø6.0mm, Ø8.0mm and so on.

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GTAW Welding

The full name of GTAW welding is Gas Tungsten Arc Welding, also call inert gas argon arc welding, namely TIG.

The electrode of GTAW is tungsten electrode or tungsten alloy, because tungsten has the highest melting point of all metal, approximately 6170℉ (3410 ℃). Tungsten and tungsten alloy electrode technical requirements established by the American Welding Society includes eight standard tungsten. Tungsten has two supply states, chemical cleaning or polishing state. Chemical cleaning refers to the state that the tungsten has been drown or forged by chemically clean. Polishing means a kind of tungsten that has a uniform diameter and smooth surface after grinding. Tungsten surface of polished state is very smoothing with perfectly cylindrical, and therefore it can be more stably to delivery heat to tungsten clip. The range of tungsten diameter is 0.20 ~ 0.25in (0.5 ~ 6.4mm), length is 3 ~ 24in (76 ~ 610mm).

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TIG Welding

The whole name of TIG is Tungsten Inert Gas Welding. It is a kind of welding which use pure tungsten or rare earth tungsten alloy as an electrode, and the protective gas is inactive gas.

TIG welding

Selection of tungsten electrodes of TIG welding is wide, such as pure tungsten electrodes, thorium tungsten electrodes, cerium tungsten electrode, lanthanum tungsten electrode, yttrium tungsten electrode, composite electrode (Triad electrode). Conventional diameter containing Ø1.6mm, Ø2.4mm and Ø3.2mm, but the length is 150mm or 175 mm. Its international standard is ISO6848. The function of tungsten electrode is to conduct current, arc ignition and maintain the normal combustion, thus requiring a larger tungsten available current, high melting point, less wear and tear, and other good features.

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Non-consumable Tungsten Electrode

Non-consumable tungsten electrode refers to rare earth tungsten electrode and tungsten electrodes, such as pure tungsten electrodes, thorium tungsten electrodes, cerium tungsten electrode, lanthanum tungsten electrode, yttrium tungsten electrode, composite electrode (Triad electrode). Non-MIG arc is that arc burn between non-consumable electrode (usually tungsten) and the workpiece, a inactive gas would flow around the welding arc which would not react with metal, and then it would form a protective hood, so that tungsten pole end, arc and weld pool and the metal which is already under a high temperature condition that would not contact with the air, preventing oxidation and the absorption of harmful gases. Thereby forming a compact welded joint whose mechanical performance is very good.

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Tungsten Electrode Application - Aluminum Alloy Welding

Tungsten electrode application application is aluminum and aluminum alloy welding. Aluminum and its alloys can be joined by more methods than any other metal, but aluminum has several chemical and physical properties that need to be understood when using the various joining processes. The specific properties that affect welding are its oxide characteristics, its thermal, electrical, and nonmagnetic characteristics, lack of color change when heated, and wide range of mechanical properties and melting temperatures that result from alloying with other metals.

Almost all kinds of welding methods can be used for aluminum and aluminum alloys, but aluminum and aluminum alloys have different adaptability to a variety of welding methods, various welding methods have their respective applications. Gas welding and arc welding methods's devices are simple and easy to be operated. Aluminum and aluminum alloy sheet can be welded by tungsten electrode AC pulse welding. Aluminum and aluminum alloy plate can use tungsten arc welding, argon-helium mixed gas tungsten arc welding, MIG welding, pulsed MIG welding.

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Tungsten Electrode Packing

Tungsten electrode packing is based on the dimensions of the elctrode. Regularly, the popular sizes with lengths of 150mm and 175mm are packed in 10pcs/box, which is plastic box.

When the lengths are longer than 175mm, such as 200mm, 300mm, 400mm, 450mm, the packing is chosen bundle one as following picture showed.

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Tungsten Electrode Standard Lengths

Lengths (mm)	Tolerance (mm)
50	+/-1.5
75	+2.5, -1.0
150	+4, -1
175	+6, -1
300	+8, -1
450	+8, -1
600	+13, -1
Customized can be ordered.

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Tungsten Electrode Standard Diameters

Diameter (mm)	Tolerance (mm)	Diameters of tungsten electrode can be tested by vernier caliper, which includes inner diameter and outer diameter. For solid tungsten electrode, the diameter is outer one. The key caliper is used mm as its unit with grids of 10, 20, and 50. Besides the standard diameters, tungsten electrode diameter can be customized, so is the tolerance.
0.25	+/-0.02
0.30	+/-0.02
0.50	+/-0.05
1.0	+/-0.05
1.5	+/-0.05
1.6	+/-0.05
2.0	+/-0.05
2.4	+/-0.1
2.5	+/-0.1
3.0	+/-0.1
3.2	+/-0.1
4.0	+/-0.1
4.8	+/-0.1
5.0	+/-0.1
6.3	+/-0.1
6.4	+/-0.1
8.0	+/-0.1
10.0	+/-0.1
Besides the above diameters, others can be customized.

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Tungsten Electrode Current Selection

Electrode Diameter (mm)	Direct Current (DC)				Alternating Current (AC)
	Electrode Negative (-)		Electrode Positive (+)		Electrode A	Electrode B
	Electrode A	Electrode B	Electrode A	Electrode B
0.25	Up to 15	Up to 15	Not applicable	Not applicable	Up to 15	Up to 15
0.30	Up to 15	Up to 15	Not applicable	Not applicable	Up to 15	Up to 15
0.50	2~20	2~20	Not applicable	Not applicable	2~15	2~15
1.0	10~75	10~75	Not applicable	Not applicable	15~55	15~70
1.5	60~150	60~150	10~20	10~20	45~90	60~125
1.6	60~150	60~150	10~20	10~20	45~90	60~125
2.0	75~180	100~200	15~25	15~25	65~125	85~160
2.4	120~220	150~250	15~30	15~30	80~140	120~210
2.5	130~230	170~250	17~30	17~30	80~140	120~210
3.0	150~300	210~310	20~35	20~35	140~180	140~230
3.2	160~310	225~330	20~35	20~35	150~190	150~250
4.0	275~450	350~480	35~50	35~50	180~260	240~350
4.8	380~600	480~650	50~70	50~70	240~350	330~450
5.0	400~625	500~675	50~70	50~70	240~350	330~460
6.3	550~875	650~950	65~100	65~100	300~450	430~575
6.4	575~900	750~1000	70~125	70~125	325~450	450~600
8.0						650~830
10.0
Electrode A refers to pure tungsten electrode. Electrode B refers to rare earth doped tungsten electrode. Blanks without value are not recommended.

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3.2 Tungsten Electrode

3.2mm is one of the most popular diameter for electrodes.

Tungsten electrode owns the following advantages: ignite easily (tip would not splash and headshot), durable (they can be sharpened). They are difficult to be polluted in spot welding (tungsten needle tip is not white). When welding aluminum bike, tungsten electrode would not deformed .

Dimension:
1)Diameter:3.2mm
2)Length:150mm, 175mm. Other lengths can be customized.

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4.8 Tungsten Electrode

Shape of tungsten electrode tip is a critical factor for TIG, when using DCSP,electrode tip is needed to br tip shape, and tip angle would change due to the different range of applications, electrode diameter and welding current. Narrow joints need smaller tip angle, when welding very thin material, it requires low current to stabilize the arc, proper grounding electrode can make a good arc stability and appropriate bead width. Cerium tungsten electrode and thoriated tungsten electrode are working in DC welding (color are gray head and red head), pure tungsten (green head) is suitable for welding AC welding (welding of aluminum).

Dimension:
1)Diameter:4.8mm
2)Length:150mm, 175mm. Other lengths can be customized.


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3.0 Tungsten Electrode

3.0 Lanthanum tungsten electrode is introduced in the 1980s from European countries to replace thorium tungsten one. The lanthanum tungsten electrode contains 2% lanthanum oxide(La203). In Europe and Japan, in most industries, lanthanum tungsten electrode has been the most commonly used for its excellent welding properties.

3.0 Cerium tungsten electrode has no radioactive contamination. It can easily arc by small current, and dimensional arc current is also small. At low current DC conditions, cerium tungsten electrode is popular, especially in pipes, small fine parts and stainless steel products welding.

Dimension:

1)Diameter: 3.0mm
2)Length: 150mm, 175mm. Other lengths can be customized.


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2.4 Tungsten Electrode

TIG welding commonly use cerium tungsten electrode as welding electrodes (tungsten needle). DC current for 2.4 tungsten electrode in TIG welding is 150 ~ 250A, AC current is 80 ~ 150A( when positive and negative half wave are balance). Thoriated tungsten electrode is a kind of rare earth tungsten with the outstanding overall performance. This type of electrode can withstand overload currents, which is widely used in the United States and other countries.

Physical Property:
Density:19.3g/cm3
Melting Point (liquid):3422℃
Conductivity:0% IACS Min
Hardness:69HRA Min

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2.0 Tungsten Electrode

2.0 tungsten electrode means 2.0mm diameter wolfram needle. This specification of cerium tungsten electrode is specifically applied in stainless steel welding. 2.0mm diameter tungsten electrode is easy to arc, and it has a long life time and other characteristics, it is mainly used in DC welding of carbon steel, stainless steel, nickel and titanium and other metals. Generally they are equipped with box, 10 pieces in each case.

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1.6 Tungsten Electrode

1.6 tungsten electrode is tungsten needle, and its diameter is 1.6mm. Wherein 1.6 thorium tungsten electrode (red head electrode) is a traditional electrode type, it has a good welding function. The arc would not break, scatter, splash in the welding process. It has stable arc and thermostability, its tungsten head can be maintained in the round shape for a long time. In addition, 1.6 tungsten electrode has a long service life.

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Minimally Invasive Tungsten Needle Electrode

Precision and accuracy of minimally invasive tungsten needle electrode has always been an essential tool for highly difficult operative approach, its ultra-fine tungsten tip can be used in a variety of muscle space. Early in the 19th century, Smith-Peterson approach (DAA) had been reported. With increasing of minimally invasive surgery in the past decade, people think highly of operative approach. Stryker minimally invasive wolfram needle electrode benefits the doctors who explore the DAA approach. Minimally invasive wolfram needle can facilitate the use of DAA and reduces complications, avoid intraoperative muscle damage, reduce postoperative pain, accelerate postoperative recovery, reaching a better clinical effect.

Minimally invasive wolfram needle electrode can reduce surgical injury, shorten the operation time, and improve the postoperative recovery, accelerate cutting speed. What's more, it has high blood coagulation efficiency with safe operation.

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Tungsten Needle Holder

Shape of tungsten needle tip is a critical factor for TIG welding. When using DCSP, electrode tip should be tip shape, and tip angle should be changed with the different ranges of applications, electrode diameter and welding current. Narrow joints need smaller tip angle, when welding very thin material, it requires low current to stabilize the arc. 


Conventional electrode sizes are Ø1.6mm, Ø2.4mm and Ø3.2mm, so the size of the tungsten electrode holder may also be given in accordance with the diameter of these specifications. Special specifications are Ø4.0mm, Ø6.0mm, Ø8.0mm and so on.

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Tungsten Needle Electrode

Tungsten needle electrode is a kin of tungsten electrode whose diameter is between 0.2 ~ 1.0mm, because it is very thin, this type of electrode is called as a wolfram needle electrodes. Tungsten needle electrode is an elongated structure tungsten products which is made of pure tungsten or tungsten alloy. It is mainly used in the electrode material of argon arc welding technology, the instrument can also be used as probes. Tungsten needle electrode is ultra-sharp electrode with a blunt head and sharp end.

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WZ8 Zirconiated Tungsten Electrode

Introduction

WZ8 zirconiated tungsten electrode contains about 0.8% zirconium dioxide, and the number 8 refers to content of the zirconium tungsten electrode. The best advantage of zirconium tungsten electrode is that the electrode tail can maintain the state of the ball even under high load current conditions, so that it can avoid the contamination of workpiece in welding to a certain extent. Therefore, WZ8 zirconium tungsten electrode has become the best choice to replace pure tungsten electrode for majority of businesses.

Trademark

WZ3 and WZ8 are the main two trademarks of zirconiated tungsten electrode, which are named in according with the content of zirconium oxide. Zirconium tungsten electrode also contains about 98% of tungsten.

Code	Impurity	Impurity Content%	Othere Impurity%	Electron Work Functon	Color
WZ8	ZrO2	0.70 - 0.90	< 0.20	2.5 - 3.0	White

Characteristic

Tip of WZ8 zirconiated tungsten electrode is white. WZ8 zirconiated tungsten electrode contains about 8% zirconium dioxide, which can improve the efficiency of arcing and its AC welding. Compared to pure tungsten electrode, zirconium tungsten electrode can maintain good arc stability. The most important point is that it can prevent workpiece from being influenced by the W after melting to a large extent in the case of the high load current. Excellent corrosion resistance is a major feature of WZ8 zirconium tungsten electrode.

Content

Zirconium dioxide is an oxide whose hardness only to diamond. It can be prepared by zirconium oxychloride fumed, colloidal, dipping, hydrolysis, high temperature hydrolysis method, alkoxide solution. This type electrode also contains a little yttria, also known as yttrium oxide.

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Zirconiated Tungsten Electrode WZ3

Introduction

WZ3 zirconiated tungsten electrode contains 3% zirconium oxide. W is abbreviation of Wolfram (tungsten), Z refers to Zirconium (Zr), 3 means the content is only about 3%. In addition, this type of electrode also having a high content of tungsten, containing 98 to 98.8% tungsten, closer to a pure tungsten electrode. It is to improve the drawbacks of pure tungsten electrode while welding, such as tungstenizing problem. While transporting zirconia, people should pay attention that it cannot be stored together with strong soda material, and it should be placed in a dry environment.

Trademark

Zirconiated tungsten electrode is mainly divided into two brands WZ3 and WZ8, since its been promoted, it is often used to replace pure tungsten electrode. In addition to the content of zirconium oxide, zirconium tungsten electrode also contains a bit of yttrium oxide and cobalt.

Code	Impurity	Impurity Content%	Othere Impurity%	Electron Work Functon	Color
WZ3	ZrO2	0.20 - 0.40	< 0.20	2.5 - 3.0	Brown

Characteristic

WZ3 zirconiated tungsten electrode is a metal rod that its electrode tip is brown, containing 2.5 - 3.0% of zirconium dioxide. This will help to improve the effect of welding results. Its arc speed is quick and arc stability is stronger than pure tungsten electrode. A small amount of zirconium dioxide can avoid tungstenizing phenomenon at high temperatures to some extent, and in the welding process, the end of the electrode can be maintained the shape of ball, so that it can protect the workpiece. If require minimal tungsten contamination, WZ3 zirconium tungsten electrode is the best choice.

Content

Zirconium is a chemical element with symbol Zr and atomic number 40. Zirconium is a lustrous, greyish-white, soft, ductile and malleable metal which is solid at room temperature. Melting point of Zirconium is 1855 °C (3371 °F). In the case of low temperatures, its molecular structure is monoclinic crystal, under the conditions of 1100 ℃ it will become tetragonal shape, when the temperature rose to above 1900 ℃, it will form the shape of a cubic crystal.

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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. 

Further details, please contact by email sales@chinatungsten.com.