Process Performance

K-TIG performs single-pass, full-penetration welds of up to 5/8 inch (16mm).

K-TIG can achieve this without edge preparation and filler material, and joints can be presented in closed square-butt configuration. This performance represents enormous productivity and costs savings for a wide range of applications.

How It Works

K-TIG uses self-induced effects to generate a plasma jet.

There is no orifice, making the process much simpler than plasma arc welding.

Just one welding gas is used, and its flow rate is not critical. The K-TIG keyhole has high inherent stability, and operates over a very wide range of welding currents. Setup is straightforward.

The K-TIG process generates strong arc forces which displace the molten metal from under the arc, so the resulting penetration is not as reliant on fluid flow as it is with other arc welding processes.

K-TIG is intended as an automated welding process for 1G and 2G welding of ferrous and non-ferrous alloys.

It is a single pass process generally suited to metals in the range of 3 mm to 16 mm or (1/8 to 5/8 inch) in thickness.

Using K-TIG we’ve experienced much lower distortion in our weldments and significantly less transverse shrinkage which is always key.
Attila Szabo, Principal Joining Engineer, GE

Typical examples K-TIG welding speeds include welding of:

  • 12 mm (15/32 inch) thick austenitic stainless steel at 250 mm/min (10 inch/min),
  • 8 mm (5/16 inch) thick C-Mn steel at 400 mm/min (15.5 inch/min),
  • 3 mm (1/8 inch) thick ferritic stainless steel at 1000 mm/min (39 inch/min).

All in a full penetration pass.

These speeds are in the middle of the operating window for the K-TIG process and can be increased (in some cases significantly) if the objective is to optimise for speed, such as may be desirable in a tube mill application.

K-TIG GE Case Study