Tungsten electrode has a high melting point, high-density, corrosion resistance, strong electronic emission ability, conduct electricity. By adding some rare earth oxides (CeO, LaO, ThO), tungsten electrodes can be improved in the area of recrystallization temperature increasing and the ability of electron emission. For that reason, its welding performance may be better than before. During the past years, thoriated tungsten electrodes were wildly used in inert gas shield arc welding, plasma arc welding, and cutting. However, these are radioactive and unhealthy, compared to other tungsten electrodes, thoriated tungsten electrodes are replaced by created tungsten, lanthanide tungsten, multi-compound rare-earth tungsten electrode. Besides argon arc welding, AEM tungsten electrodes are eagerly used in xenon lamp and painting fields.
Tungsten Electrode Specifications
Diameter
Diameter Tolerance
Length
Length Tolerance
mm
inch
mm
mm
mm
1.00
0.040
±0.05
50, 75, 150, 175, 178
±0.10
1.60
1/16
±0.05
50, 75, 150, 175, 178
±0.10
2.00
5/64
±0.05
50, 75, 150, 175, 178
±0.10
2.40
3/32
±0.05
50, 75, 150, 175, 178
±0.10
3.20
1/8
±0.05
50, 75, 150, 175, 178
±0.10
4.00
5/32
±0.05
50, 75, 150, 175, 178
±0.10
4.80
3/16
±0.05
50, 75, 150, 175, 178
±0.10
6.40
1/4
±0.05
50, 75, 150, 175, 178
±0.10
8.00
5/16
±0.05
50, 75, 150, 175, 178
±0.10
10.00
25/64
±0.05
50, 75, 150, 175, 178
±0.10
Lanthanated-Tungsten Electrode
Lanthanated tungsten electrode is similar to thoriated tungsten electrode with the characters of on-radioactive, excellent electric conductivity, welding performance, high carrying capability, and a minimum ratio of burnt area. It can be substituted for a thoriated tungsten electrode, which is mainly used for DC welding.
Type
Oxide Addition
Dopant
Impurities
W
Electric Work Function
Color
WLa10
La2O3
0.8-1.2%
<0.05%
Bal.
2.8 eV-3.2 eV
Black
WLa15
La2O3
1.3-1.7%
<0.05%
Bal.
2.8 eV-3.2 eV
Golden
WLa20
La2O3
1.8-2.2%
<0.05%
Bal.
2.8 eV-3.2 eV
Sky blue
Multi-compond Rare-earth Tungsten Electrode
The compound rare earth Tungsten electrode is doped with various oxides, with excellent welding performance.
Type
Oxide Addition
Dopant
Impurities
W
Electric Work Function
Color
WXY30
Multi-compond rare-earth
1.0-4.0%
<0.05%
Bal.
2.45 eV-3.10 eV
Light blue
Application
Main substitute of radioactive thoriated Tungsten electrode, and other Tungsten electrodes.
Ceriated-Tungsten Electrode
Ceriated Tungsten electrode, with easier arc ignition, and low arc maintaining current under low current circumstances, is substituted for thoriated Tungsten electrode, especially for DC welding.
Type
Oxide Addition
Dopant
Impurities
W
Electric Work Function
Color
WCe20
CeO2
1.8-2.2%
<0.05%
Bal.
2.7 eV-2.8 eV
Gray
Application
Applied for the welding of pipelines, and small components, and discontinuous welding.
Thoriated-Tungsten Electrode
It is radioactive. If it is compared with pure Tungsten electrodes and others, its welding performance is more excellent, with the advantages of easy operating, stable electric arc, and long-life.
Type
Oxide Addition
Dopant
Impurities
W
Electric Work Function
Color
WTh10
ThO2
0.9-1.2%
<0.05%
Bal.
2.0 eV-3.9 eV
Yellow
WTh20
ThO2
1.8-2.2%
<0.05%
Bal.
2.0 eV-3.9 eV
Red
WTh30
ThO2
2.8-3.2%
<0.05%
Bal.
2.0 eV-3.9 eV
Purple
WTh40
ThO2
3.8-4.2%
<0.05%
Bal.
2.0 eV-3.9 eV
Orange
Application
Mainly applied for carbon steel, stainless steel, nickel alloy.
Zirconium-Tungsten Electrode
Zirconiated Tungsten, with the advantages of AC welding, especially under high load current, can not be replaced by any other Tungsten electrodes.This kind of Tungsten electrode retains a balled end when welding, with corrosion resistance.
Type
Oxide Addition
Dopant
Impurities
W
Electric Work Function
Color
WZr3
ZrO2
0.2-0.4%
<0.05%
Bal.
2.5 eV-3.0 eV
Brown
WZr8
ZrO2
0.7-0.9%
<0.05%
Bal.
2.5 eV-3.0 eV
White
Application
Suitable for AC welding of aluminum, magnesium, and their alloys.
Pure Tungsten Electrode
Non-addition, requiring a high voltage for arc derivation, low current capacity, and easily burnt.
Type
Oxide Addition
Dopant
Impurities
W
Electric Work Function
Color
WTh10
---
---
<0.05%
Bal.
4.5 eV
Green
Application
Suitable for AC welding of aluminum, magnesium, and their alloys.
Yttrium-Tungsten Electrode
A long, thin arc beam with high compression, deeper burning groove under medium and high current circumstances.
Type
Oxide Addition
Dopant
Impurities
W
Electric Work Function
Color
WY20
Y2O3
1.8-2.2%
<0.05%
Bal.
2.0 eV-3.9 Ev
Blue
Application
Mainly apllied for military industry and aerospace industry.
Black Tungsten Electrode
The Tungsten electrode rod is manufactured by forging, drawing, coarse grinding, and fine grinding process. We can supply any specifications of the Tungsten electrode rod.
Type
Oxide Addition
Dopant
Impurities
W
Electric Work Function
Color
WCe20
CeO2
1.8-2.2%
<0.05%
Bal.
2.7 eV-2.8 eV
Yellow
WLa15
La2O3
1.3-1.7%
<0.05%
Bal.
2.8 eV-3.0 eV
Red
WTh20
ThO2
1.8-2.2%
<0.05%
Bal.
2.0 eV-3.9 eV
Purple
Application
Applied for argon arc welding under the low current circumstance. Its usage condition is the same as kinds of Tungsten electrode.
