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.

Tackling corrosion in urea processes

Stainless Steel World Publisher -
An interview with Mr. Kirk Ofei from Stamicarbon, who enjoys working on challenging and interesting projects that test his intelligence and qualifications and increase his knowledge.

The evolution of EPC’s in India

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The Indian EPC business is growing rapidly at a faster pace than even China’s booming industry. At the same time the level of technical knowledge of materials and equipment is steadily increasing. Stainless Steel World spoke to Mr. Mrinal Das, Senior General Manager, Projects at Jacobs Engineering who has worked on projects in the Indian market for 29 years, about how the industry – and the role of a Project Manager – has evolved.

Outokumpu invests in bar finishing

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Outokumpu has commissioned an investment in its bar finishing capabilities for Degerfors Long Products in Sweden. The investment comprises a new pit furnace, straightener, peeler as well as bar stock services.

SeAH Changwon commissions extrusion press line

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SeAH Changwon Integrated Special Steel (SeAH CSS) in South Korea has commissioned the tube extrusion press line which SMS group supplied in a record time.

PSC expands Speyside Foundry Group

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Pacific Steel Casting Company ( PSC) has added two new steel foundries to the Speyside Foundry Group. These include Ashland Foundry & Machine Works of Ashland, PA and West Coast Foundry of Los Angeles, which produce carbon, low alloy, nickel-based, duplex, austenitic/super austenitic, and martensitic alloys from a few pounds to 7500 lbs.

ISSF announces winners of new applications

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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 ISSF-21.

Outokumpu SS innovations receive European patents

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The latest Outokumpu stainless steel innovations, high-chromium ferritic stainless steel grade Core 4622 (EN 1.4622) and high-chromium austenitic stainless steel grade Supra 316plus (EN 1.

A wealth of experience in manufacturing at Nas Toa

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The company Nas Toa Co. Ltd., a member of the Nippon Yakin Kogyo group, has considerable experience in the manufacture of welded stainless steel and high-performance alloyed pipes and tubes. Here they share some of the technical knowledge they have gained in perfecting these products.

Outokumpu provides super duplex for SS boat

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Outokumpu provided Forta super duplex stainless steel for a prototype of an offshore patrol vessel made by Swedish ship maker Swedish Steel Yachts AB (SSY).

Sandvik showcases at OTC Houston 2017

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Sandvik, a developer and producer of stainless steels and other high-performance materials for the oil and gas industry, showcased its products to more than 90,000 Offshore Technology Conference (OTC) attendees in Houston from May 1-4, 2017.
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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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