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.

TISCO listed as one of the national key R&D scheme

Stainless Steel World Publisher -
The “high strength & high corrosion-resistant stainless steel and its applicationâ€? project jointly applied and participated in by many units amongst whom TISCO is listed as one of the national key R&D schemes for upgrade and industrialization of key basic material technologies.

DNV GL reveals patterns behind failures

Stainless Steel World Publisher -
Learning from previous failures and accidents is very crucial in a lean and cost effective organisation and is often a fundamental requirement in regulations.

Proposed ASTM specification to help engineers

Stainless Steel World Publisher -
ASTM International group has recently declared that it is creating a consolidated reference guide for engineers and consultants who want to use stainless steel in transportation and construction projects.

Rolled Alloys receives Nadcap reaccreditation

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Rolled Alloys, suppliers of stainless steels, duplex, nickel, cobalt, and titanium alloys, has recently retained its Nadcap accreditation following a surveillance audit, demonstrating a continued investment in resources to meet stringent industry and customer requirements.

Outokumpu stainless steel strengthens dam locks

Stainless Steel World Publisher -
Outokumpu has recently delivered duplex stainless steel for the two locks, or spillway gates, in the upgraded Lossendammen dam structure in Central Sweden.

Sandvik stainless steel in tunnel construction

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NSB AS, the Norwegian state-owned railroad company, started building a high-speed railway, creating a triangle from Oslo to southern Norway and then up to Bergen, navigating the scenic attractions, all of which required a great deal of innovative thinking as well as experienced partners.

CENTRAVIS pipes prequalified by TAKREER

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CENTRAVIS has been prequalified by Abu Dhabi Oil Refining Company (TAKREER) as an approved supplier of seamless stainless, alloyed and duplex steel tubes and pipes.

Singapore to build fifth desalination plant

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Singapore has recently decided to build a fifth desalination plant on the Jurong Island in order to battle the negative effects of climate changes.

AMRC Castings investment help cut costs

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A new investment that significantly increases AMRC Castings’ ability to produce large scale castings with a superior surface finish could help to radically reduce the cost to the UK of storing nuclear waste.

Nuclear AMRC works with Sellafield Ltd

Stainless Steel World Publisher -
The Nuclear Advanced Manufacturing Research Centre (Nuclear AMRC) is working with Sellafield Ltd to slash the cost of making future designs of waste container boxes, potentially saving hundreds of millions of pounds in decommissioning costs.
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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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