WP (EWP) is a green-tip pure tungsten intended for traditional transformer-based AC TIG welding on aluminum and magnesium. Modern inverter AC machines generally perform better with ceriated or lanthanated tungsten.
When Pure Tungsten Makes Sense
WP is the traditional choice for AC TIG welding on aluminum and magnesium with transformer-based power sources, where the electrode is commonly prepared with a balled end. Modern inverter AC machines generally benefit from ceriated or lanthanated tungsten, so check the welder manual before choosing WP.
Key Specifications
- Classification: WP / EWP
- Composition: Minimum 99.5% tungsten
- Primary current: AC
- Color code: Green
- Length: 7" (175 mm)
- Package: 10 electrodes, vacuum sealed
- Diameter options: .040" (1.0 mm), 1/16" (1.6 mm), 3/32" (2.4 mm), and 1/8" (3.2 mm)