Advantages of Duplex Stainless Steel Pipe Fittings

Duplex stainless steel pipe fittings exhibit many significant advantages in industrial applications, mainly due to their unique microstructure and chemical composition.
Excellent corrosion resistance
Duplex stainless steel pipe fittings combine the good toughness of austenitic stainless steel with the chloride ion corrosion resistance of ferritic stainless steel, allowing them to perform well in a variety of corrosive environments. Especially in environments containing highly corrosive media such as chloride ions and sulfuric acid, the resistance of duplex stainless steel pipe fittings to pitting corrosion, crevice corrosion and stress corrosion is far highter to that of ordinary austenitic stainless steel. This good corrosion resistance ensures the long-term stable operation of the pipeline system and reduces the frequency of maintenance and replacement.
High strength and toughness
Duplex stainless steel pipe fittings have extremely high strength and good toughness, and their yield strength is usually about twice that of ordinary 18-8 austenitic stainless steel. This means that under the same operating pressure, duplex stainless steel pipes can use thinner wall thicknesses, thereby reducing the weight of the entire piping system and reducing material costs. At the same time, the high toughness enables duplex stainless steel pipelines to maintain better integrity when subjected to shock or vibration, improving the safety of the system.
good welding performance
The welding performance of duplex stainless steel pipe fittings is excellent, the tendency of hot cracking is small, and the corrosion resistance of the welded joint is equivalent to that of the base material. This is due to the interaction between the austenite phase and the ferrite phase in duplex stainless steel, which makes hot cracks and cold cracks less likely to occur during the welding process. In addition, duplex stainless steel can also be dissimilarly welded with ordinary austenitic stainless steel or carbon steel, expanding its application range.