TST25040X10 - 1/4" Pre-Ground Thoriated Tungsten Electrodes (40° Tip) - 10 Pack

Precision Ground for High-Amp Performance

The TST25040X10 by Techniweld offers a premium solution for heavy-duty GTAW applications. This 10-pack features 2% Thoriated (AWS Class EWTh-2) tungsten electrodes, sized at a substantial 1/4" diameter and pre-machined with a 40° included angle. This specific geometry is critical for maintaining arc focus and preventing tip erosion at amperages exceeding 300A.

Thoriated tungsten remains the standard for DC Electrode Negative (DCEN) welding on carbon and stainless steels due to its high electron emission rates and resistance to contamination. However, preparing 1/4" tungsten requires significant grinding effort and can lead to inconsistent tip shapes if done manually. The TST25040X10 solves this by delivering factory-precision points, ensuring identical arc characteristics with every changeover. This is particularly beneficial for mechanized or orbital TIG setups where repeatability is paramount.

Key Applications:

• Heavy-wall pipe welding
• Pressure vessel fabrication
• Automated/Mechanized TIG systems
• Hardfacing and overlay operations

By using pre-ground electrodes, you also minimize the release of thoriated dust in the workshop, contributing to a safer environment. Equip your high-capacity torches with TST25040X10 for reliable, deep-penetrating arcs and superior longevity.