The ESAB Pure Tungsten Electrode (SKU: Q76Z57) is a premium consumable designed for specific TIG welding applications requiring unalloyed tungsten. Identified by its industry-standard Green color code, this electrode contains a minimum of 99.5% tungsten, classifying it as EWP under AWS standards. This composition makes it distinct from thoriated or lanthanated options, as it possesses the highest electron work function of all tungsten types. While this requires higher amperage to start the arc, it provides unique benefits for Alternating Current (AC) welding.
Pure tungsten is renowned for its ability to form a clean, balled end when heated. This balled tip is crucial for AC welding as it provides a stable arc on sine wave power sources, commonly found in older transformer-based welding machines. The balling action helps distribute the heat evenly across the tip, preventing the tungsten from splintering or contaminating the weld pool, which is a critical factor when working with sensitive materials like aluminum and magnesium.
This pack contains 10 ground-finish electrodes, each measuring 2.4mm (3/32 inches) in diameter and 175mm (7 inches) in length. The 2.4mm size is a versatile middle-ground, capable of handling a wide range of amperages suitable for general fabrication and repair work. Because these electrodes contain no added oxides, they are non-radioactive, eliminating the health concerns associated with grinding thoriated tungsten. However, they are strictly recommended for AC welding; using pure tungsten on Direct Current (DC) is generally discouraged as it degrades rapidly and provides poor arc starts.
Key Technical Specifications:
| Additional Information |
|---|
| Packaging Description:pack of 10 |
| Brand:ESAB |
| Material Composition:Pure Tungsten (99.5% Min) |
| Diameter:2.5mm (3/32") |
| Length:175 mm |
| Color Code:Green |
| AWS Classification:EWP |
| Current Type:AC (Alternating Current) |
| Surface Finish:Ground |
