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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.

TISCO duplex output set record high for 2010

Stainless Steel World Publisher - February 28, 2011

TISCO achieved a significant increase in duplex steel production for 2010, producing a total development amount of 1000tns. This is an increase by 66% compared to 2009, fully replacing imported products.

Allied Group acquires Gieminox

Stainless Steel World Publisher - February 25, 2011

Tectubi Raccordi, a subsidiary of Allied Group, has acquired a majority share in Gieminox S.R.L., a consolidated manufacturer of longitudinal welded pipes, fittings and auxiliary components in stainless steel, nickel and nickel alloys, duplex and superduplex.

Molybdenum production increases

Stainless Steel World Publisher - February 16, 2011

Figures released by the International Molybdenum Association (IMOA) revealed that world-wide production of molybdenum continued to increase during the third quarter of 2010, although usage fell.

Lucefin acquires KSM

Stainless Steel World Publisher - February 14, 2011

Trafilix SpA has taken over KSM SAMA DE GmbH from Sama Inox Group. Established in 1979, KSM is located in Empfingen, south of Stuttgart in the southern German region of Baden-Württemberg.

Stainless industry makes comeback

Stainless Steel World Publisher - February 7, 2011

According to Steel & Metals Market Research (SMR), from a global perspective, the stainless steel industry has left the crisis behind.

Fronius introduces the Robacta TX

Stainless Steel World Publisher - January 31, 2011

Fronius’ new Robacta TX torch body changeover system reduces idle time and increases process reliability, system availability, welding quality and productivity.

Polysoude offers high-tech weld heads

Stainless Steel World Publisher - January 27, 2011

Polysoude has created new, more productive and ergonomic high tech weld heads, setting a new technological standard for automated orbital TIG welding. The new orbital welding heads make tube to tubesheet welding and tube-tube welding especially easy for the operator.

Marcegaglia commissions new lines in Russia

Stainless Steel World Publisher - January 26, 2011

Marcegaglia has commissioned two new automatic lines at its subsidiary Marcegaglia Ru, for the production of electro-welded stainless steel tubes in Vladimir, Russia.

Pacific Coast Nickel purchases PCNC’s projects

Stainless Steel World Publisher - January 25, 2011

Prophecy Resource Corporation and Pacific Coast Nickel Corporation have entered into a binding letter of agreement where PCNC will acquire Prophecy's Nickel PGM projects by issuing common shares to Prophecy.

7th Stainless Steel Conference

Stainless Steel World Publisher - January 12, 2011

Como, Italy, 21-23 September 2011 2nd Announcement & Call for Papers

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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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