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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Henkel helps beer barrel manufacturer improve quality

Henkel has helped Envases Técnicos Zaragoza S.L. (Entinox), a Spanish manufacturer of stainless steel beer barrels, set up an innovative pickling and passivating line using a nitric acid-free Bonderite process.

Sandvik, Langley Alloys extend partnership to USA

Sandvik Materials Technology has appointed Langley Alloys as its preferred partner for the distribution of duplex and super duplex stainless steels to the NAFTA region.

Sassda Columbus Stainless awards 2018

The winners of the 2018 Sassda Columbus Stainless Awards have been announced at a glittering banquet in Johannesburg, South Africa, with 189 entries from 53 companies resulting in a stellar list of more than 60 finalists.

Joelle receives 2018 Duplex World Lifetime Achievement

At each Duplex World Seminar, a Lifetime Achievement Award is bestowed on an individual who has made an outstanding contribution to the global materials industry.

Axium Process Hygienic Fabrication

Axium Process specialise in hygienic engineering design, fabrication and system solutions utiilising a wide range of corrosion resistant superalloys including exotic alloys; Hastelloy®, Duplex®, Inconel®, and Monel® as well as high performance engineering plastics such as PEEK®.

Special Quality Alloys Ltd granted PED 2014/68/EU

Special Quality Alloys Ltd have successfully been granted the Pressure Equipment Directive (PED) 2014/68/EU approval. The approval applies to the design, manufacture and conformity assessment of stationary pressure equipment with a maximum allowable pressure greater than 0,5 bar.

NSSC awarded gold and bronze awards for duplex projects

Nippon Steel and Sumikin Stainless Corp. have won the Gold and Bronze awards in the categories for Best New Technology and Best New Development at the International Stainless Steel Forum (ISSF) held in Shanghai in May this year.

Shijiazhuang’s centrifugal chemical pump

Shijiazhuang An Pump Machinery Co., Ltd is a professional chemical pump manufacturer with professional furnish and equipment for stainless steel and duplex stainless steel.

2205 Duplex Stainless Steel Mesh

2205 Duplex Stainless Steel Mesh includes wire mesh, perforated metal and expanded metal. It is known for providing excellent mechanical and anti-corrosive features.

Milestone reached in Pedelta’s stainless steel bridge

The first North American duplex stainless steel bridges designed and engineered by Pedelta Canada, will soon be lifted into position in Toronto.


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.