| Item | Specification |
| Diameter range | 0.25–6.4 mm |
| Standard length | 75–600 mm |
| Commonly used specifications | 1.0 mm, 1.6 mm, 2.4 mm, and 3.2 mm |
Using metallic tungsten—characterized by a high melting point (3683°C ± 20°C), high density, and corrosion resistance—as the base material, the product is manufactured by incorporating 0.3%–5% rare earth oxides (e.g., cerium, thorium, lanthanum, zirconium, yttrium, etc.) via powder metallurgy. It exhibits excellent electrical and thermal conductivity as well as high-temperature stability.
Common types include cerium-tungsten electrodes, lanthanum-tungsten electrodes, thorium-tungsten electrodes, zirconium-tungsten electrodes, and yttrium-tungsten electrodes.
Cerium-tungsten electrodes: Non-radioactive, with excellent arc-starting performance and obvious advantages in low-current welding.
Lanthanum-tungsten electrodes: Feature good mechanical cutting performance, strong creep resistance, and a high recrystallization temperature, suitable for AC (alternating current) welding.
Thorium-tungsten electrodes: Offer superior welding performance; however, due to the radioactivity of thorium oxide, their usage has gradually decreased.
Zirconium-tungsten electrodes: Can only be used for welding in AC environments, maintain a spherical shape at the tip, and have good corrosion resistance.
Yttrium-tungsten electrodes: Achieve a large penetration depth under medium and high currents, mainly used in the military and aerospace industries.
Tungsten electrodes are conductive materials used in fields such as arc melting, high-frequency induction furnaces, and electron beam melting. They are widely applied in processes including gas tungsten arc welding (GTAW), plasma arc welding, and plasma arc cutting.
English