5. Interest, advantages and limitations of the TIG process

TIG is the most flexible of all arc welding processes. It only adds calories to the part to be welded, whereas other processes add calories by depositing filler metal. The TIG process can be supplemented with metal, but this is only applied if desired and is never linked to the value of the welding current. This makes it an ideal process when weld bead quality is important. It's also an excellent process for repairs.

• This total independence from the filler metal is complemented by exceptional chemical inertness: the filler metal melts in the molten bath without altering its qualities. The TIG process neither adds nor subtracts elements from the metal it carries, except in the MIG melting process