Test Article
Tungsten electrodes are the heart of the TIG welding process, providing a stable arc and precise control across a wide range of materials. Different tungsten types are identified by coloured tip markings, with each composition offering specific performance characteristics for AC and DC applications, including aluminium, stainless steel, mild steel and exotic alloys.
The colour chart below provides a quick reference guide to the most common tungsten electrode types, helping you select the right electrode for your welding application based on current type, material and operating conditions.
| Tip Colour | Type | Best For |
|---|---|---|
| Black | Lanthanum (1%) | AC & DC – general purpose |
| Blue | Lanthanum (2%) | AC & DC – premium all round tungsten |
| Gold | Lanthanum (1.5%) | AC & DC – popular all rounder |
| Green | Pure | AC welding aluminium |
| Grey | Ceriated (2%) | Low amp DC, thin materials |
| Purple | E3 | AC & DC – long life hybrid tungsten |
| Red | Thoriated (2%) | DC welding steel & stainless |
| White | Zirconiated (0.8%) | AC welding aluminium |