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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Sverdrup Steel lean duplex for storage tank plants

Various industries often require high-strength and corrosive-resistant materials for their storage tank plants.

Duplex World registration now open!

Duplex World unites researchers, manufacturers, end-users and suppliers in an open and focused forum. It’s your chance to network with the leading minds driving...

Arcus Wire wins ASSDA Fabricator Project of the Year Award

The Australian Stainless Steel Development Association (ASSDA) award category Fabricator Project of the Year was accepted by Arcus Wire Groups’ International Sales Manager Josh...

Process pumps – standard and special

Stroble Pumpen has successfully dispatched four CPP 40-25-250 process pumps manufactured in duplex stainless steel in accordance with API 685. The pumps are characterised...

BUTTING deliver duplex pipes to Middle East on time

BUTTING impressed its customer in the oil and gas industry in the Middle East with its optimal time management. The family business produced a...

Outokumpu divests its plate services in, Italy

Outokumpu’s plate services in its service center in Castelleone, Italy, is to be taken over by one of the company’s biggest customers in Italy,...

Duplex World Advance Seminar Program available now!

The advance program for the eagerly awaited Duplex World Seminar & Summit, which takes in place in Rotterdam on 1 & 2 November 2022,...

Daniel Ambrose joins Sverdrup Steel as Head of Sales UK

Daniel Ambrose has joined the Sverdrup Steel UK team as Head of Sales UK – Flat Products. Daniel has extensive knowledge of the duplex/stainless steel...

SQA receives Queen’s Award for Enterprise

Special Quality Alloys Ltd is celebrating the announcement that they will be honored with the coveted Queen’s Award for Enterprise in the category of...


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.