Power in red: The WT20 tungsten electrodes for maximum control during DC TIG welding
If you need maximum precision and consistent performance in TIG welding the red tungsten electrode WT20 (EWTh-2) is exactly the tool you need Tool. With its thoriated composition, it delivers an extremely stable arc, starts reliably and withstands even even under continuous load - perfect for stainless steel, nickel alloys and all demanding DC TIG applications.
WT 20 - red - 305WTR0001
WT 20 - red - 305WTR0002
WT 20 - red - 305WTR0003
WT 20 - red - 305WTR0004
WT 20 - red - 305WTR0005
WT 20 - red - 305WTR0006
WT 20 - red - 305WTR0007
WT 20 - red - 305WTR0008
WT 20 - red - 305WTR0009
Composition and material advantages
The WT20 MMAs consist of around 98 % tungsten (W) and are doped with doped with1.7 - 2.2 % thorium dioxide (ThO₂). This addition of thorium improves the electron emission and makes the MMA particularly and powerful current.
What this means for you in practice
- Easy ignition and stable arc control - even at low currents low amperages.
- Significantly higher current carrying capacity (up to 10 % more than pure Tungsten electrodes).
- Long service life due to reduced tip wear.
According to EN ISO 6848:2015, red MMA electrodes are clearly labelled as WT20 are clearly labelled.
Main area of application: Precision and performance in DC TIG welding
The WT20 tungsten electrodes are designed for direct current welding processes (DCEN) processes - i.e. with a negatively polarised MMA. Their field of application almost all high-performance applications where control, Control, penetration and durability are crucial. Thanks to their thoriated alloy, they produce a smooth, concentrated arc with high Arc with a high energy density - ideal for precise weld seam Weld seam guidance and clean results in the DC range.
When welding high-alloy steels, the WT20 ensures a stable, concentrated arc that forms a clean weld pool. This this produces uniform weld seams with optimum penetration. The controlled weld pool helps to avoid microstructural changes - ideal for thin-walled ideal for thin-walled components and applications where quality and Corrosion resistance are crucial.
Typical areas of application
- Stainless steel and stainless steels: Perfect for welding work on Pipes, tanks or structural components where constant arc stability is required constant arc stability is required.
- Nickel and titanium alloys: Preferred in apparatus engineering, aerospace Aeronautical engineering and motor racing, where precision and Precision and repeatability are crucial.
- Copper, bronze and silicon bronze: Particularly suitable for Work with high thermal conductivity, such as heat sinks, Contact parts or copper cables.
- Molybdenum, niobium, tantalum and refractory metals: For special applications in tool and mould making Special applications in tool and mould making and in the energy and chemical and chemical industries where extreme temperatures occur.
- Structural steels and alloyed materials: Also used in classic Maintenance or repair welding, the WT20 impresses with reliable ignition reliable ignition and consistently stable weld seam quality.
Typical areas of application
- Series production with frequent arc ignition
- Sheet metal, apparatus and pipe welding
- Production and repair work in workshop or assembly applications
- Automated DC welding processes, for example in robotic systems or orbital welding systems Orbital welding systems
For a 2.4 mm WT20 MMA electrode, the optimum working current range is 40 - 160 A, depending on the material and the desired seam depth Seam depth. In industrial practice, WT20 MMA electrodes are characterised by are characterised by stable arc control even during long welding cycles and excellent re-ignition behaviour - properties that save time and material Save time and material.
Correct grinding for the best results
The geometry of the tip has a major influence on the arc and Seam appearance.
The following applies to DC welding applications:
- Tip shape: Conical, ground lengthways.
- Grinding angle: Between 30° - 45° to achieve a focussed arc to achieve a focussed arc.
- Grinding direction: Always lengthwise to the MMA to ensure even electron Electron emission.
Safety instructions for grinding:
Thoriated MMAs are considered to be slightly radioactive - their radiation is harmless when handled correctly, but is critical when grinding. It is essential to work with suction or a closed grinding device should be used. Breathing masks (P3 filter) and precise extraction significantly reduce exposure to thorium dust. Your safety always has top priority!
Looking for a radiation-free alternative?
We recommend the following alternatives for applications where a radiation-free variant is preferred: Gold WLa15, Grey WCe20, Turquoise WR2, Purple WS2.
Key technical data (WT20)
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