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.

Outokumpu’s duplex steel for wind power towers

Stainless Steel World Publisher -
Finnish hollow stainless steel section manufacturer Stalatube has selected Outokumpu’s duplex stainless steel as one of the main construction material for its new StalaWind wind power towers.

CRCC for Raccortubi Group

Stainless Steel World Publisher -
Raccortubi Group is pleased to announce that both Raccortubi do Brasil Ltda. and Raccortubi S.p.A., Group headquarters, have been granted Petrobras’ seal of approval and awarded the Certificado de Registro e Classificação Cadastral. This follows on from Petrobras’ recent technical approval of the butt weld fittings manufactured by the Group’s integrated Tecninox plant.

Outokumpu stainless steel for SSY’s steel boat

Stainless Steel World Publisher -
newsitemOutokumpu duplex stainless steel is used in the first ever boat built entirely out of stainless steel. The boat represents true innovation in the shipbuilding industry.

Schulz Group appoints new COO at SXP

Stainless Steel World Publisher -
The Schulz Group appointed Sebastien Leclerc as the new COO of its subsidiary Schulz Xtruded Products (SXP) in Tunica, Mississippi, effective 9 September 2014.

Shanxi Taigang Stainless Steel revamps plant No. 1

Stainless Steel World Publisher -
newsitemAfter the successful commissioning of the new 80-ton Duplex RH-TOP plant No. 2 (Ruhrstahl Heraeus process) in last April, Taigang Group International Trade Co., and the plant operator Shanxi Taigang Stainless Steel Co., (TISCO), both located in Taiyuan, China, have successfully revamped and commissioned the existing 80-ton Duplex RH-TOP plant No.

Grand prize for TISCO’s project

Stainless Steel World Publisher -
newsitemThe China Iron and Steel Association and the Chinese Society for Metals officially announced the appraisal results of 2014 Metallurgical Science and Technology Award on 1 September.

Dursan bio-inert coating for corrosion resistance

Stainless Steel World Publisher -
newsitemExisting techniques for enhancing bio-inertness and protein release such as polyethylene glycol (PEG) systems lack stability and will oxidise in the presence of oxygen, rendering them useless.

Steel tubes for umbilicals in the North Sea

Stainless Steel World Publisher -
Vallourec, the premium tubular solutions company, has been awarded a contract by Technip Umbilicals for the Edradour project operated by TOTAL in the UK.

Schulz Group Appoints New COO at SXP-Schulz Xtrude

Stainless Steel World Publisher -
newsitemThe Schulz Group is pleased to announce the appointment of Sebastien Leclerc as the new COO of its subsidiary Schulz Xtruded Products (SXP) in Tunica MS, U.S.A.

Tecninox’s butt weld fittings approved by Petrobras

Stainless Steel World Publisher -
Tecninox, the integrated manufacturing plant within Raccortubi Group, has been awarded Petrobras’ technical approval for its butt weld fittings.
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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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