Nitrogen is an inert gas used in many welding processes, as it offers both savings and technological benefits.
Applications on austenitic stainless steels, ferritic and duplex stainless steels are by far favouring Nitrogen compared to Argon, as it reduces or eliminates welding porosity.
Laser welding is carried out with many types of materials, pure argon or mixed with other gases is used on some, while nitrogen is used on others. Nitrogen has a central role on laser welding applications on noble materials, including austenitic stainless steels, ferritic stainless steels and austenitic-ferritic steels (Duplex).
With the appearance of optic fibre, manufacturers of laser sources and welding systems have developed applications where Argon and Helium are effectively replaced with nitrogen, thereby allowing for considerable savings, in some cases also from a technical point of view.
Top technological applications have been carried out in the steel pipe welding sector. Some pipe manufacturers have decided to adopt this technology to increase their production output and limit energy consumption. Nitrogen was chosen for its ability to reduce or even eliminate porosity in the welded area, effectively creating a technological innovation.