Best Welds WL2040X7 2% Lanthanated Tungsten Electrode .040" x 7" 10-Pack

The Best Welds WL2040X7 is a 2% Lanthanated (EWLa-2) TIG tungsten electrode measuring .040" in diameter and 7" in length, sold in a package of 10. Color-coded dark blue for easy identification, this electrode is the industry's preferred non-radioactive replacement for 2% thoriated (red) tungsten.

Composed of 97.3% tungsten with 1.8%–2.2% lanthanum oxide and 0.5% other additives, the WL2040X7 delivers superior arc initiation, excellent arc stability, and a low erosion rate. It performs exceptionally in both AC and DC TIG welding applications, making it a true general-purpose electrode compatible with inverter and transformer-based constant current power sources.

Key Features:

• Non-radioactive — safe substitute for 2% thoriated tungsten (EWTh-2)
• 2% Lanthanum Oxide (EWLa-2/WL20) — color code: Dark Blue
• Superior arc starting and reignition, especially at lower amperages
• Low burn-off rate and resistance to thermal shock for longer electrode life
• Compatible with AC and DC welding on inverter or transformer-based power sources
• Suitable for carbon steel, stainless steel, nickel alloys, titanium alloys, aluminum alloys, magnesium alloys, and copper alloys
• Diameter: .040" (1.0 mm) | Length: 7 inches
• Composition: 97.3% Tungsten, 1.8–2.2% Lanthanum Oxide, 0.5% other
• Package of 10 electrodes

The .040" diameter makes this electrode well-suited for precision, low-amperage TIG work on thin materials. The 2% lanthanated formulation combines the best characteristics of thoriated and ceriated tungsten — excellent arc starts, a wide amperage range, and minimal tip erosion — all without the radioactive handling concerns associated with thoriated electrodes.