Optimization and certification of the welding process for pipes made from a new super-duplex steel

For the chemical industry, specifically in industrial plants dedicated to the production of fertilizers, it is a challenge to ensure good properties in the joints of duplex or super-duplex steels used in the manufacture of pipes for various infrastructures. This is particularly important when performing field welds, especially when the welds are exposed to highly corrosive environments. The main objective is to ensure good mechanical properties, with an adequate balance between strength and toughness, along with good corrosion resistance for both the weld and the heat-affected zone, preventing the formation of brittle intermetallic phases and ensuring a proper balance between austenite and ferrite phases.