Duplex

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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.

Discover the latest innovations in duplex technology with our exclusive Duplex World Update. Download this 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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Langley Alloys acquires Copeland and Craddock Ltd.

Langley Alloys Holdings of Newcastle under Lyme announced its purchase of the business from the Copeland family.

Two duplex stainless steel storage tanks for Bakelite

Bakelite Synthetics is a manufacturer of innovative synthetic materials, including the production of formaldehyde. Amongst other things, this substance is used in the production...

TechnipFMC awarded TotalEnergies Angola contract

TechnipFMC has been awarded a significant contract to supply flexible pipe and associated hardware for the first subsea life extension project by TotalEnergies EP...

TWI installs welding and arc-based AM equipment

TWI has recently installed a Kuka KR16-3 S welding robot at its headquarters in Cambridge. The robotic system has been integrated with a SBI...

Swiss Steel divests distribution companies

Swiss Steel Group has announced plans to sell several distribution companies to JACQUET METALS, a leading distributor of speciality metals. The transaction encompasses entities...

Baker Hughes Masoneilan delivers API control valves

In 2022, Baker Hughes Masoneilan won a critical API control valve package for the Mero-3 offshore FPSO project. Shipped in Jan 2023, these severe...

Outokumpu restarts furnace ahead of schedule

Outokumpu has restarted its third ferrochrome furnace earlier than planned but continues to optimize ferrochrome production capacity. The furnace was shut down temporarily beginning...

AM to detect counterfeit parts

Texas A&M University researchers have developed a method of imprinting a hidden magnetic tag, encoded with authentication information, within metal manufactured hardware during the...

Fifty years of working with Shell

On the 11th November, Nippon Steel Corporation, Sumitomo Corporation and Shell held a ceremony in The Hague, the Netherlands, to celebrate the 50th anniversary...

Alleima receives an order of OCTG tubes for CCS project

Alleima has received an order of Oil Country Tubular Goods (OCTG) tubes to be used for a carbon capture and storage (CCS) project. Through...


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.

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.