Duplex Steel Pipes

The first-generation Super Duplex Steel Pipes were developed more than 70 years ago in Sweden for use in the sulfite Paper industry. Duplex alloys were originally created to combat corrosion problems caused by chloride-bearing cooling waters and other aggressive chemical process fluids. Called Super Duplex Pipe because of its mixed microstructure with about equal proportions of ferrite and austenite, Duplex stainless steels are a family of grades, which range in corrosion performance depending on their alloy content. The term �Super-Duplex� was first used in the 1980�s to denote highly alloyed, high-performance Duplex steel with a pitting resistance equivalent of >40 (based on Cr% + 3.3Mo% + 16N%). With its high level of chromium, these Duplex Steel Pipes provide outstanding resistance to acids, acid chlorides, caustic solutions and other environments in the Chemical/Petrochemical and Pulp & Paper industries, often replacing 300 series Stainless Steel, high nickel Super-austenitic Steels and nickel-based alloys. The chemical composition, based on high contents of chromium, nickel and molybdenum improves inter-granular and pitting corrosion resistance. Additions of nitrogen promote structural hardening by interstitial solid solution mechanism raises the yield strength and ultimate strength values without impairing toughness. Moreover, the two-phase microstructure guarantees higher resistance to pitting and stress corrosion cracking in comparison with conventional stainless steels. From the introduction of its first-generation, Duplex Steel has seen a steady increase in its popularity. Recently, the production of high-strength, corrosion resistant super-duplex coil has been implemented in the marine and chemical industries, architecture and mast riggings, wire lines, lifting and pulley equipment and well service strands. In fact, development of wire processing techniques has enabled the production of steel wires down to 1mm in diameter. High strength, durability and exceptional resistance to corrosion are the highlights of the Duplex Steel Pipes, which we offer. Minimum Order Quantity : 1 kg