Best Gas for TIG Welding
Despite their strength and toughness, austenitic stainless steels are by far the most weldable steels and can be welded by all welding processes.
However, to reach optimal results, it is important to identify the best performing gas for TIG welding.
Experts recommend adding hydrogen to pure argon.
By using this mixture, welders will see multiple benefits such as increased welding speed, improved penetration, lower gas consumption and overall costs, and lower ozone emissions.
Alternatively, experts suggest switching to N5 NH5 (five percent hydrogen in nitrogen) mixture when purging and backing gas. This process will remove any remaining oxygen inside the pipe or object that is being welded to avoid contamination while improving the root bead penetration at a lower amperage.