48.0005.0175 - Fronius WC20 Ceriated Tungsten Electrode 4.0mm x 130mm (Grey)

Technical Overview of Fronius WC20 Tungsten Electrode

The Fronius WC20 Tungsten Electrode (SKU: 48.0005.0175) is a high-performance non-consumable electrode designed for Gas Tungsten Arc Welding (GTAW). This specific electrode features a diameter of 4.0mm and a length of 130mm, adhering to precise manufacturing tolerances typical of Fronius engineering. The 'WC20' designation indicates a composition of tungsten with approximately 2% cerium oxide (CeO2). This addition significantly lowers the electron work function compared to pure tungsten, facilitating easier arc starting and maintaining a stable arc at lower voltages.

One of the primary technical advantages of Ceriated tungsten is its versatility. It is an excellent non-radioactive alternative to Thoriated (red) tungsten, eliminating the health risks associated with radioactive dust during grinding. The WC20 electrode performs exceptionally well in both Direct Current (DC) and Alternating Current (AC) welding processes. In DC applications, it provides reliable starts and maintains a sharp point for precision work on carbon and stainless steels. In AC applications, often used for aluminum and magnesium, the ceriated electrode holds a balled end well without excessive splitting, provided the amperage is within the appropriate range for the 4.0mm diameter.

The 4.0mm diameter is classified as a heavy-duty size, capable of sustaining high welding currents required for thick plate fabrication. The 130mm length is slightly shorter than the standard 150mm or 175mm lengths often found in the industry. This specific length is often required for specific torch back-cap configurations, compact torch heads, or automated orbital welding systems where clearance is a factor. Users should verify their torch compatibility with 130mm electrodes to ensure proper fitment and adjustment range.

Fronius ensures that these electrodes meet stringent ISO and AWS standards. The grey color code allows for immediate visual identification in a mixed workshop environment. For industrial MRO operations, stocking WC20 electrodes provides a 'universal' solution that covers a broad spectrum of materials, reducing inventory complexity while maintaining high weld quality standards.