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.

Ambica Steels’ stainless steel mill

Stainless Steel World Publisher -
Ambica Steels’ stainless steel mill employs a range of steel making technologies. It produces around 80,000tns/yr in most austenitic ferritic, martensitic and duplex grades of stainless steel, in a broad range of finished and semi-finished products which find wide ranging applications in various Industrial Sectors.

Outokumpu duplex agreement

Stainless Steel World Publisher -
Outokumpu and Italian-based Acciaierie Valbruna SpA, have signed a non-exclusive patent and trademark license agreement, which grants Valbruna the right to use Outokumpu's LDX 2101 duplex stainless steel grade in all long products, such as bar, rebar and wire products in the European Union, Norway and Switzerland. Lean Duplex grade LDX 2101, a low-nickel, high-strength stainless steel developed and patented by Outokumpu, was commercially introduced in 2002 and has met with great success in demanding applications.

Gorgon project to use duplex

Stainless Steel World Publisher -
Chevron Australia Pty Ltd, a subsidiary of Chevron Corp., has awarded a USD 200 million front-end engineering and design (FEED) contract for the Gorgon LNG project to Kellogg Joint Venture Group (KJVG).

CC/CV arc welding machines

Stainless Steel World Publisher -
The new Origo/Aristo range of CC/CV welding machines from ESAB enables all types of stainless and mild steel to be welded, together with a range of other materials with plate thicknesses of 0.5mm and up.

Lightweight footbridge in Spanish town

Stainless Steel World Publisher -
The small Basque city of Zumaia is located at the junction of two rivers that flow into the Bay of Biscay. The rivers slice through the city, so one crucial part of the development program is a footbridge to improve accessibility.

Burhan West & Harmal gas pipeline project

Stainless Steel World Publisher -
Al Hassan Engineering Co. SAOG (AHEC) has received a multi-million dollar contract for the Burhan West and Harmal pipeline project from the Omani government gas department.

Outokumpu contracts Accenture

Stainless Steel World Publisher -
Outokumpu, a manufacturer of duplex stainless steel, has awarded Accenture a 5 year application outsourcing contract to provide Outokumpu with application development and application management services for its enterprise resource planning system on a global basis.

Valves with floating ball design

Stainless Steel World Publisher -
Innovative Pressure Technologies (IPT) has introduced API 3000 and 6000 Class Ball Valves.

Duplex joining electrode

Stainless Steel World Publisher -
Arcos Industries LLC, located in Mt. Carmel, Pennsylvania, now offers new bare wire and covered stainless steel electrodes, Arcos 2209, which are designed for joining 22% chromium duplex stainless steels including 2205.

Outokumpu duplex brochure

Stainless Steel World Publisher -
Outokumpu has produced a brochure which catalogues the DUPROF high strength structural sections manufactured from Duplex stainless steel plate.
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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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