ADVANTAGES OF PLASMA WELDING:

1. Less sensitivity to changes in Arc length.
2. Recessed electrode reduces the possibility of tungsten inclusions in the weld and can
   substantially increase the period between electrode dressings resulting in increased life.
3. Weld in a single pass up to 6 mm plates in square butt position and 10 mm plates in only     two passes.
4. Keyhole mode of welding gives smaller heat affected zone resulting in reduced strength     loss at the joint for heat treated metals, promotes less grain growth which gives better     ductility.
5. Reduced weld time results in less embrittlement by carbides and complex intermetallic     compounds for stainless steel and super alloys.
6. Equalization of distortion stresses results in less residual stress.
7. Less filler metal required in keyhole mode significantly reduces porosity.