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The SDSS have been increasingly used in the offshore industry due to their excellent mechanical properties and corrosion resistance properties to the media they are exposed to. The SDSS are mainly used in subsea components such as Christmas Trees, Manifolds, BOP and also for Topside Modules in Platforms. A well balanced chemical composition guarantees the outstanding corrosion and mechanical properties of SDSS material. Ferrite forming elements such as Cr, Mo ensure a high resistance to chloride containing media as well as a high strength. Austenite forming elements Ni and Ni balance the microstructure to 50%. However, the thermal instability increases with the amount of elements and restricts the weldability compared to usual stainless weld metal of the 3xx series.

In particular the GMA-, and SA welding process asks for a specific approach to minimize the tendency to pore formation. This report describes the influence of a fine tuned chemical composition and welding parameters to achieve a sound weld metal along with an optimum in corrosion resistance.