Take You To Understand What Is Duplex Stainless Steel Welded Pipe

Duplex Stainless Steel Welded Pipe has good welding performance. Compared with ferritic stainless steel and austenitic stainless steel, it is not like the welding heat-affected zone of ferritic stainless steel. Due to the severe grain coarsening, the plastic toughness is greatly reduced. Unlike austenitic stainless steel, it is more sensitive to welding hot cracks.

Due to its special advantages, duplex stainless steel is widely used in petrochemical equipment, seawater and wastewater treatment equipment, oil and gas pipelines, paper making machinery, and other industrial fields. In recent years, it has also been studied in the field of bridge load-bearing structures. Prospects.

In duplex stainless steel, the ferrite phase and austenite phase account for half of each in their hardened structure, and the minimum phase content may reach 30%.

Duplex stainless steel has an α+γ dual-phase structure, so its performance characteristics are built with the characteristics of austenitic stainless steel and ferritic stainless steel, and it is a kind of stainless steel with the best high strength and corrosion resistance. Usually, in the case of low C content, the Cr content is 18%~28%, and the Ni content is 3%~10%. Some steels also contain alloying elements such as Mo, Cu, Nb, Ti, and N.

Compared with ferrite, it has higher plasticity and toughness, no room temperature brittleness, and significantly improved intergranular corrosion resistance and welding performance. Features. Compared with austenitic stainless steel, the yield strength is significantly improved, and the resistance to intergranular corrosion, stress corrosion, corrosion fatigue, and abrasion is significantly improved.

Dingshang is a professional welded stainless steel pipe manufacturer. For more information, please continue to follow us!