CK Worldwide Tungsten Electrodes
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CK Worldwide TIG Welding Electrodes/ Tungsten Electrodes offers several Premium grades of tungsten electrode.
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Tungsten Electrodes from CK Worldwide
The tungsten is created using a very slow doping process that allows for principal oxides to be added efficiently.
Following is more information on the products.
TIG welding electrodes usually contain small quantities of metallic oxides, which can offer the following benefits:
> Facilitate arc starting
> Increase arc stability
> Improve current carrying capacity of the electrode
> Reduce the risk of weld contamination
> Increase electrode life
Oxides used are primarily zirconium, thorium, lanthanum or cerium. Additions are usually 1% – 4%. These oxides greatly improve arc initiation, especially when direct current (DC) welding is employed. Thorium oxide (thoria) has been used for many years, having been found effective in terms of long life and thermal efficiency. Zirconium oxide (zirconia) has been commonly used for alternating (AC) TIG welding, normally for welding aluminum.
Color Code and Alloying Elements for Various Tungsten Electrode Alloys
| ISO 6848 | AWS A5.12 | PRINCIPAL OXIDE | COLOR Code and alloying | SIZE | PART No. | SHORT TEXT |
|---|---|---|---|---|---|---|
| WT20 | EWTh-2 | Thorium Oxide (ThO2) 1.7–2.2% | Red | 0.5mmx175mm 1.0mmx175mm 1.6mmx175mm 2.4mmx175mm 3.2mmx175mm 4.0mmx175mm | T0207GT2 T0407GT2 T1167GT2 T3327GT2 T187GT2 T5327GT2 | Direct Current (D/C) applications. Good D/C arc starts and stability, medium erosion rate, medium amperage range, medium tendency to spit. RADIOACTIVE |
| WP | EWP | None | Green | 0.5mmx175mm 1.0mmx175mm 1.6mmx175mm 2.4mmx175mm 3.2mmx175mm 4.0mmx175mm | T0207G T0407G T1167G T3327G T187G T5327G | Alternating Current (A/C) for aluminum alloys and magnesium alloys in low to medium amperage. Balls easy, tends to spit at higher amperages. Used for non-critical welds only. Non Radioactive. |
| WL15 | EWLa-1.5 | Lanthanum Oxide (LaO2) 1.30–1.70% | Gold | 0.5mmx175mm 1.0mmx175mm 1.6mmx175mm 2.4mmx175mm 3.2mmx175mm 4.0mmx175mm | T0207GL T0407GL T1167GL T3327GL T187GL T5327GL | Direct Current (D/C) as an alternative to 2% Thoriated. Best D/C arc starts and stability, low erosion rate, wide amperage range, no spitting. Non-Radioactive. |
| WC20 | EWCe-2 | Cerium Oxide (CeO2) 1.80–2.20% | Gray | 0.5mmx175mm 1.0mmx175mm 1.6mmx175mm 2.4mmx175mm 3.2mmx175mm 4.0mmx175mm | T0207GC2 T0407GC2 T1167GC2 T3327GC2 T187GC2 T5327GC2 | Alternating Current (A/C) or Direct Current (D/C) applications. Good ignition and re-ignition properties, long service life, excellent arc stability, Low erosion rate, best at low amperage range, no spitting, good D/C arc starts and stability. Non-Radioactive. |
| WL20 | EWLa-2 | Lanthanum Oxide (La2O3) 1.80–2.20% | Blue  | 0.5mmx175mm 1.0mmx175mm 1.6mmx175mm 2.4mmx175mm 3.2mmx175mm 4.0mmx175mm | T0207GL2 T0407GL2 T1167GL2 T3327GL2 T187GL2 T5327GL2 | Best general purpose electrode for both Alternating Current (A/C) or Direct Current (D/C). Good arc starts and stability, medium to high amperage range, low erosion rate. Non Radioactive |
| WZ8 | EWZr-8 | Zirconium Oxide (ZrO2) 0.70–0.90% | White  | 0.5mmx175mm 1.0mmx175mm 1.6mmx175mm 2.4mmx175mm 3.2mmx175mm 4.0mmx175mm | T0207GZ T0407GZ T1167GZ T3327GZ T187GZ T5327GZ | Alternating Current (A/C) for aluminum alloys and magnesium alloys. Balls well, less pitting, better arc starts and arc stability than pure tungsten. Non-Radioactive. |
| LaYZr | EWG | Lanthanum (La2O3) 1.3–1.7%; Zirconium (ZrO2) 0.06–0.10%; Yttrium Oxide (Y2O3) 0.6–1.0% | Chartreuse | 0.5mmx175mm 1.0mmx175mm 1.6mmx175mm 2.4mmx175mm 3.2mmx175mm 4.0mmx175mm | T0207GTM T0407GTM T1167GTM T3327GTM T187GTM T5327GTM | Best for automated or robotic applications in Alternating Current (A/C) or Direct Current (D/C) due to low voltage tolerance (changes in tip to work piece distance). Very stable tip geometry, runs cooler than WT20 grade with longer life, low to medium amperage range. Very best low amperage starts. Non Radioactive |