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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The first vessel in this series of four Stainless steel tankers was delivered on June 27. The latest member of the Utkilen A/S fleet is now delivered and left the shipyard on 28th of June.
In July 2019, Sandvik will open a state-of-the-art coiled tubing line for premium grades of seamless stainless-steel products in smaller dimensions at its Zhenjiang tube mill near Shanghai, China.
The "Sociétés de Projets Industriels" funds (âSPI fundsâ?), managed by Bpifrance and subscribed jointly by the French Government and the European Investment Bank under the "Juncker Plan", have invested in the capital of Vallourec Umbilicals, specialized in the manufacture of tubes for umbilicals, to support and finance its phase of industrialization on a larger scale.
ACERINOX, one of the most competitive groups in the world in stainless steel manufacturing, has contracted Danieli Automation for the electrical and automation revamping of the Stainless Steel Slab Caster at Columbus Stainless (Pty) Ltd.
The International Stainless Steel Forum (ISSF) has announced the winners of the Gold, Silver, and Bronze Awards in the categories New Technology and New Development during their 23rd conference (ISSF-23) which was held in Chicago.
To help customers achieve the highest production rates, best cut quality and lowest cost per cut, Kinkelder has further developed its TCT product range for solid cutting applications.
LB Bentley, based at the Kingfisher Business Park in Stroud, part of the Severn Glocon Group, has identified an ideal platform for producing its subsea valves, and also its filter and dryer equipment, from tough materials.
A working meeting between Alexey Miller, Chairman of the Gazprom Management Committee, and Andrey Komarov, Chairman of the Board of Directors of ChelPipe, took place recently in Moscow.
Sverdrup Steel now holds a vast stock range of coil, plate and round bar throughout Europe and in Korea. This along with our highly qualified metallurgists, knowledgeable sales team and our strong supply chain partners have made us a global provider within the special steel grades segment.
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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