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.

Schulz Group appoints new Sr. VP

Stainless Steel World Publisher -
The Schulz Group has appointed Dr Iris Rommerskirchen as the new senior vice president, Business and Product Development, as part of the management team effective 19 January 2015.

Dr Rommerskirchen is an experienced executive with a special expert knowledge about applications, behavior, properties and fabrication of corrosion resistant materials, Duplex-, Superduplex- and clad pipes.

IPP Scomark Engineering milestone

Stainless Steel World Publisher -
IPP Scomark Engineering Ltd – part of the IPP Group, today completed the last milestone of a high pressure manifold for Total in its engineering workshop. The manifold is destined for the Total E&P operated Martin Linge oil and gas in the Norwegian sector of the North Sea.

Raccortubi acquires Petrol Raccord

Stainless Steel World Publisher -
On 24th December, Raccortubi, leading stockholder, manufacturer and supplier of piping materials, completed the acquisition of Petrol Raccord S.p.A., manufacturer of butt weld fittings for the oil & gas, power generation and petrochemical industries, in a deal to expand Raccortubi Group’s production range.Established in 1969, Petrol Raccord manufactures butt weld fittings up to 56â€?, almost without wall thickness limitations, and holds an impressive number of end-user approvals, as well as quality certification for the nuclear industry.

1st chemical tanker with DSS & stainless clad steel

Stainless Steel World Publisher -
Usuki Shipyard Co. delivered the first chemical tanker in the world to use a combination of duplex stainless steel (DSS) and stainless clad steel in the construction of its cargo tanks to Oita-based Hiro Naviera on 15 November 2014.

Wärtsilä expands duplex valve range

Stainless Steel World Publisher -
Wärtsilä Shipham Valves has extended its full range of duplex and super duplex stainless steel valves to cover higher pressure ratings.

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.

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.

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.
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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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