A Brief Introduction To Duplex Stainless Steel Pipe

Duplex stainless steel pipe has good welding performance, compared with ferritic stainless steel and austenitic stainless steel, it is neither like the welding heat affected zone of ferritic stainless steel, due to the serious coarsening of the grain and the plastic toughness is greatly reduced, nor is it more sensitive to welding hot cracks like austenitic stainless steel.
Due to its special advantages, duplex stainless steel is widely used in petrochemical equipment, seawater and wastewater treatment equipment, oil and gas pipelines, papermaking machinery and other industrial fields, and has also been studied for bridge load-bearing structure in recent years, with good development prospects.
Duplex stainless steel is in its solid quenching structure ferrite phase and austenite phase accounted for half each, generally the minimum phase content may reach 30%.