Tag: duplex

Duplex Stainless Steels

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.

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.

JV established for cold rolled stainless sheet

Stainless Steel World Publisher -
newsitemNippon Steel & Sumikin Stainless Steel Corporation, Sichuan Southwest Stainless Steel Co., Ltd. (Head Office: Leshan City, Sichuan Province, People’s Republic of China; Representative Director: Shengyi Zeng), a business division of Sichuan Jinguang Industrial Group Co.,Ltd.

“If askedâ€?, US to offer support for TAPI pipeline

Stainless Steel World Publisher -
 The United States has said that it is ready to provide further support to the Turkmenistan-Afghanistan-Pakistan-India (TAPI) gas pipeline project.

Caprari and Peme Gourdin form alliance

Stainless Steel World Publisher -
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 for sea water / offshore application

Stainless Steel World Publisher -
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® makes NSSC2120, weldable lean duplex

Stainless Steel World Publisher -
newsitemNSSC (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.

Rolled Alloys to open new Richburg, SC facility

Stainless Steel World Publisher -
newsitemRolled Alloys intends to open its newest facility in South Carolina. The new 33,000sq/ft service center will feature an extensive inventory of stainless and alloy bar products and processing equipment.

Sunoco, Carlyle in discussion for JV

Stainless Steel World Publisher -
Sunoco, Inc. has entered into exclusive discussions with The Carlyle Group, a global alternative asset manager, regarding a potential joint venture involving Sunoco's 330,000 barrel-per-day refinery in Philadelphia.If a transaction were to go through, Sunoco would contribute its Philadelphia refinery assets in exchange for a non-operating minority interest in the joint venture.

INTECSEA awarded URF Design Engineering

Stainless Steel World Publisher -
McDermott has awarded INTECSEA the Design Engineering for the Ichthys Field Development project in the Browse Basin, offshore Western Australia.

Tata Steel secures deepwater contract

Stainless Steel World Publisher -
newsitemTata Steel has been awarded an eight-figure US dollar contract to supply pipe for Enterprise Products Partners L.P.’s new crude oil export pipeline in the Gulf of Mexico’s Keathley Canyon area.

Rio Tinto to implement driverless trucks

Stainless Steel World Publisher -
newsitemRio Tinto will put driverless trucks into a production iron ore mine in Western Australia's Pilbara region, following a five truck trial in its West Angelas mine. The company will deploy ten automated Komatsu haul trucks to the Junction South East pit of its Yandicoogina mine.
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The advantages of Duplex Stainless Steels

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. There are several variants available, such as Duplex 2205, Superduplex 2507 or lean duplex with lower nickel content.

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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