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.
Discover the latest innovations in duplex technology with our exclusive Duplex World Update. Downloadthis comprehensive 3-part series now and gain valuable insights from industry experts on groundbreaking applications and developments in duplex material science.
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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A long-term strategic alliance has been established between Caprari and Peme Gourdin, two European manufacturers specialized in water centrifugal pumps. As a result of the strongly complementary sales networks, markets and products of the two concerns, this new partnership will provide fresh opportunities for Caprari customers who will be able to count on an alternative and even wider choice of products, pumping solutions and services, than the already comprehensive range developed during almost 70 years of history and experience in the sector.
Air valves are normally required on piping systems, for example, offshore fire fighting systems, to vent air from a pipeline/riser on pump start-up and admit air back into the system under vacuum conditions. Often they are overlooked, yet play a crucial role within a pipe/pump system. It is important that they are correctly specified with their function, size and location to help in ensuring that the system is operating efficiently.
NSSC (Nippon Steel & Sumikin Stainless Steel Corporation) has successfully developed NSSC2120 (21Cr-2Ni-N), the world’s first type 304 substituting type lean duplex stainless steel with high heat-input weldability.
Hamilton Metals, one of the largest stocking distributors of Corrosion Resistant Alloys (CRA) for the exploration and production industry, has opened a new stocking facility in Edmonton, Alberta.
After an intensive 3 day survey of all aspects of Quality management Systems and Technical applications including manufacturing, heat treatment and testing procedures, IPP Scomark has been added to the BP Global Approved Vendor List to supply Duplex and Super Duplex materials.
Piping components in duplex, super duplex (and 31254) used in Norwegian offshore activities have been constantly under very tight scrutiny due to the critical nature of the installations.
Xinjiang Tianrui Continuous Casting Special Steel Group Co. has partnered with Xinjiang Production and Construction Group State-Owned Assets Management and Operation Co.
A wood waste-to-energy plant worth USD 80 million is being proposed for the White Swan area. The plant, using woody debris from Yakama Indian Nation forest lands, would employ about 30 people and be in operation by the fall of 2013.
Sulzer’s Customer Support Services in Leeds (UK) and Sulzer Pumps Norway AS has won a contract for a retrofit-upgrade programme in Statoil’s Sleipner gas field based on their ability to achieve a much higher performance in a series of replacement cartridge pumps.
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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NSSC (Nippon Steel & Sumikin Stainless Steel Corporation) has successfully developed NSSC2120 (21Cr-2Ni-N), the world’s first type 304 substituting type lean duplex stainless steel with high heat-input weldability.