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. They 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.

Sulzer supplies Bonga oilfield

Sulzer Pumps Ltd has built 22 pumps of different types at its Leeds factory for installation on a Korean-built, floating oil production vessel in Wallsend.

UK source for pipes

The production facilities for the manufacture of specialist formed and welded pipes previously supplied by Bentham International have been taken over by the Angle Ring Co. Ltd (Tipton, UK).

Super duplex pump

The Port Klang Power Station in Malaysia routinely faced "unacceptable" costs associated with downtime on their existing pumps.

Sandvik supplies Nigerian gas field

Sandvik Steel has produced its first high-volume order for large diameter stainless steel tubes for gas lift risers (GLR).

Sandvik supplies duplex to W. Africa

Sandvik Steel has received orders for nearly half a million metres of duplex stainless steel tubing, for hydraulic and chemical injection lines for subsea umbilical cables, for ExxonMobil's Kizomba project and the Zafiro project, both in West Africa.

Super duplex used in fluid system solution

Sandvik Steel AB (Sweden) and Swagelok (USA) have together produced an integrated fluid system solution using Sandvik’s super duplex stainless steel grade SAF 2507™, that performs successfully in highly corrosive, chloride-containing environments, such as oil and gas exploration and production.

Bright future for stainless in architecture

Fabricators of stainless steel can expect future high demand for their products in architectural applications, according to a recent report by Paul Snelgrove written for the British Stainless Stainless Steel Association.

Golden choice

Two 2205 duplex stainless steel elution columns over 12 metres long have been installed in a replacement project at Kalgoorlie Consolidated Gold Mines in Western Australia.

Raccortubi: changes at the top

Raccortubi Group announces that Mr Ottavio Carollo has been appointed General Manager of Raccortubi.

Uprated dosing pump

The MRoy range of dosing pumps has been extended with the introduction of the XB model, a hydraulically actuated diaphragm pump which delivers flow rates up to 310 litre/h and maximum pressures of 105bar.