Achemetal Tungsten & Molybdenum Co., Ltd.
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WC20 Cerium Tungsten Electrode Rod Tungsten Alloy Electrode For Welding
Description
WC20 Tungsten Electrode
| Trade mark | Added impurity | Impurity quantity % | Other impurity | Electric discharged power |
Color sign |
| WC20 | CeO2 | 1.8~2.2% | <0.2% | 2.7~2.8 | grey |
WT20 TIG welding tungsten electrode tungsten rod
| Modle | Diameter (mm) | Length (mm) | Materal | Application |
| WC20 | 1.0 | 150 175 | CeO2 | Stainless stell parts samll precision parts |
| 1.6 | ||||
| 2.0 | ||||
| 2.4 | ||||
| 3.0 | ||||
| 3.2 | ||||
| 4.0 | ||||
| 4.8 |
Cerium tungsten electrode
Cerium oxide is added tungsten, cerium production of tungsten electrodes.
Specific data in the following table:
Grade dopant doping amount other doping electron work function color coating head WC20 CeO2 1.80 ~ 2.20% <0.20% 2.7 ~ 2.8
gray tungsten cerium has the following advantages over the tungsten thorium materials:
* non-radiative * * low melting rate of long life * good welding arc resistance.
Therefore, tungsten, cerium is the best substitute for low current welding environment tungsten thorium.
Cerium tungsten electrode is mainly used in low current DC welding.
Cerium tungsten at low current arc has a very good performance,and thus become the most rail pipe welding equipment manufacturer's standard.
In addition, it can also be used for other low-current applications such as precision small parts welding.
Cerium tungsten is not suitable for use under high current conditions, since under such conditions,
the oxide will quickly move to the high heat region, i.e., the tip electrode welding zone,
so that the uniformity of the oxide of the damage, so the oxidation uniform distribution of these benefits was brought will cease to exist.
1. WC20 tungsten electrode perform best in DC welding at low current settings but can be used proficiently in AC processes.
With its excellent arc starts at low amperages, WC20 tungsten has become popular in such applications as orbital tube and pipe fabricating,
thin sheet metal work, and jobs involing small and delicate parts.
2.Argon arc welding with WC20 tungsten electrode (EWCe - 2) cathode spot small, pressure drop, not burning,
WC20 tungsten electrodes usually contains 2% cerium oxide, used in dc or ac,it is mainly used for dc welding.cerium tungsten electrode is easy to crack.
3.Advantages: WC20 tungsten electrode (EWCe - 2) service life is longer, no radiation, melting rate is low.
WC20 tungsten electrode is the best product, under low flow welding is also used for other low current welding such as small and complicated parts.
4.Application: mainly used in carbon steel, stainless steel, silicon bronze, copper, bronze, titanium welding materials.
| TABLE 1 Composition, Density and Hardness Properties | |||
| Class | Nominal Tungsten Weight % | Density g/cc | Hardness AB Rockwell "C" max |
| 1 | 90 | 16.85-17.25 | 32 |
| 2 | 92.5 | 17.15-17.85 | 33 |
| 3 | 95 | 17.75-18.35 | 34 |
| 4 | 97 | 18.25-18.85 | 35 |
A When specified by the purchaser, other hardness testing methods may be employed.
B For mechancially worked or aged material, the hardness can be as high as Rc46.
| TABLE 2 Mechanical Properties, Minimum Values | |||||
| Class | Ultimate Tensile Strength | Yield Strength at 0.2% Offset | Elongation,A% | ||
| ksi | MPa | ksi | MPa | ||
| 1 | 110B | 758 | 75 | 517 | 5B |
| 2 | 110B | 758 | 75 | 517 | 5B |
| 3 | 105B | 724 | 75 | 517 | 5B |
| 4 | 100 | 689 | 75 | 517 | 2 |
A Determine with an extensometer accurate to 0.5% elongation or class.
B Nonmagnetic composition to Classes 1,2and 3 shall be 94 ksi(648 MPa) miinimum ultimate tensile strength . Minimum alongation shall be 2% on Classes 1 and 2 and 1% on Class 3.
Process flow
