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.

Gibson appoints new director

Gibson Tube Inc. (North Branch, New Jersey, USA), a specialist in welded stainless steel, nickel and duplex alloy tubing, has recently opened a new office in Houston, Texas.

New bridge using stainless steel rebar

The Oregon Department of Transportation (ODOT), using highly alloyed stainless steel reinforcing bar in its concrete structures

Karl Schäfer retires from Butting

An appreciation by Sjef Roymans of Stainless Steel World

Pro Metals relocates to larger facility

Pro Metals Inc., the distributor of alloy piping products, has announced its relocation to a new, larger facility in Houston, Texas, the company’s base of operations.

Marine Corrosion Club

The Marine Corrosion Club is organising its annual series of technical presentations in the UK.

Super duplex strands and wire ropes

Advanced Metals International Group, the leading multi-metal stockholder/supplier and metal processor, announce the availability of new high performance strands and wire ropes for industrial, marine and chemical environments.

Duplex arch for York Millennium Bridge

Officially opened in April 2001, the 140m-long York Millennium Bridge crosses the River Ouse on the southern boundary of the City.

Stainless Steel World 2001: day 2

Lively workshops, fascinating papers, a seminar on market research and of course the traditional conference dinner were among the highlights of the Stainless Steel World 2001 Conference and Expo's second day.

Antonius and Kupa plan stainless expo in Slovakia

Antonius Vesselheads, a specialised manufacturer of vesselheads and cones, is organising a conference together with stainless steel producer Kupa AS in Bojnice, Slovakia, on Friday 26 October 2001.

Sandvik duplex and super duplex used for drilling

Pioneering development by Sandvik Steel and by key customers in the offshore oil and gas industries has seen Sandvik's duplex and super duplex stainless steels become the industry standard for hydraulic tubes in drilling risers, which provide the link between drilling platforms and equipment on the seabed.