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.

Jeroen Bierbooms joins the Langley Alloys

Stainless Steel World Publisher -
Langley Alloys is pleased to announce the appointment of Jeroen Bierbooms as their agent for the Benelux region. Langley Alloys Limited is a British company with a worldwide reputation.

Hydrasun’s success with FUSION XP range

Stainless Steel World Publisher -
Further to the development of Fusion XP™ precision manufactured welded fittings range, Hydrasun has recently secured almost GBP 1m of new business from key customers who are working on a number of new major subsea projects.

Raccortubi Group to Showcase at Tube 2018

Stainless Steel World Publisher -
Raccortubi Group will be showcasing its fastest delivery possibilities at TUBE 2018 in Düsseldorf. In addition, the extensive availability of raw material in sheets and plates in duplex, super duplex and 6mo up to 50mm, and in titanium up to 15mm, allows for fulfilling deliveries in 4-6 weeks thanks to a dedicated production line at Petrol Raccord called Fast Track.

C-class inserts for easy duplex milling

Stainless Steel World Publisher -
DoPent features pentagonal, double-sided inserts with 10 effective cutting edges for reduced cost per edge. The new C-class insert helps minimize the axial runout when mounted on the cutter for superior surface finish quality.

Gazprom, ChelPipe sign roadmap

Stainless Steel World Publisher -
Gazprom and ChelPipe, have signed a roadmap for the development and batch production of pipes for offshore projects. In accordance with the document, ChelPipe will adopt the technology to produce pipes from the 25Cr super duplex steel and the UNS N06625 nickel alloy.

Robinson Pipe & Vessel’s ASME duplex vessels

Stainless Steel World Publisher -
A commitment to following American Society of Mechanical Engineers (ASME) standards is the first step in achieving a high level of safety in pressure vessel performance.

Sverdrup Steel opens new company in Busan

Stainless Steel World Publisher -
Sverdrup Steel have opened new subsidiary company in Busan, Korea. Sverdrup Steel Korea Ltd will be managed by GM Min-young Jung, who has vast experience within the domestic Korean high performance steel market.

2nd edition pulp, paper & biomass conversion

Stainless Steel World Publisher -
Nickel Institute is pleased to announce that it has published a fully revised second edition of Stainless Steels and Specialty Alloys for Pulp, Paper and Biomass Conversion a popular and practical guide for mill and project engineers within the pulp, paper and biomass sector.

Nickel-based super alloys for sour wells

Stainless Steel World Publisher -
The new face of oil and gas discovery will be with deep wells. As compared to shallow wells, deep wells normally need high performance nickel based alloys.

Effect of rotational speed on intergranular corrosion resistance of friction welded...

Stainless Steel World Publisher -
In this research paper super duplex stainless steel SAF 2507 has been selected to investigate the intergranular corrosion resistance of friction welded SDSS SAF 2507 joints. The joints were welded at three different rotational speeds: 700 rpm, 1080 rpm and 1600 rpm and three different friction pressures: 40 Mpa, 69 Mpa and 78 Mpa.
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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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