Duplex stainless steels have a ferritic-austenitic microstructure, in roughly equal proportions 50% ferrite and 50% austenite. Duplex combines many of the attractive properties of ferritic and austenitic stainless steels into one.
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Different variants for Duplex
Duplex stainless steels are designed to provide better corrosion resistance, in particular to stress corrosion and pitting corrosion. The microstructure leads to higher strength than standard austenitic stainless steels such as Type 304 or 316. Duplex stainless steels have become more and more popular in recent years. There are several variants available, such as Duplex 2205, Superduplex 2507 or lean duplex with lower nickel content.
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Advanced Metals International Group, the leading multi-metal stockholder/supplier and metal processor, announce the availability of new high performance strands and wire ropes for industrial, marine and chemical environments.
Lively workshops, fascinating papers, a seminar on market research and of course the traditional conference dinner were among the highlights of the Stainless Steel World 2001 Conference and Expo's second day.
Antonius Vesselheads, a specialised manufacturer of vesselheads and cones, is organising a conference together with stainless steel producer Kupa AS in Bojnice, Slovakia, on Friday 26 October 2001.
Pioneering development by Sandvik Steel and by key customers in the offshore oil and gas industries has seen Sandvik's duplex and super duplex stainless steels become the industry standard for hydraulic tubes in drilling risers, which provide the link between drilling platforms and equipment on the seabed.
Sandvik Steel has developed a super duplex filler metal which matches the properties of 13% chromium super martensitic stainless steel used for pipelines in the oil and gas industries.
Nicholson Steam Trap, Walden, NY is offering a broad new line of strainers designed to suit most applications. Its line of Y Strainers line in cast iron, bronze, steel and stainless steel.
A series of accidents has recently been affecting swimming pools all over Europe, with lampposts, air conditioners, ceilings and other suspended objects falling.
Corrosion Resistance: Duplex stainless steel has excellent corrosion resistance due to its high chromium and molybdenum content. It is particularly resistant to stress corrosion cracking and pitting, which makes it suitable for use in harsh environments.
Strength: Duplex stainless steel is much stronger than conventional austenitic stainless steels, which allows for thinner and lighter constructions without sacrificing durability.
Toughness: Duplex stainless steel has a high toughness, which means it is resistant to brittle fracture and impact. This property makes it suitable for use in cryogenic applications.
Cost-effectiveness: Although duplex stainless steel is more expensive than conventional austenitic stainless steels, its superior properties can lead to cost savings in the long run by reducing maintenance and downtime.
Versatility: Duplex stainless steel can be used in a wide range of applications, including chemical processing, oil and gas, marine, and pulp and paper industries. It is also used in construction and architecture due to its aesthetic appeal.
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