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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.

Villares Metals wins stainless billets contract

Stainless Steel World Publisher - December 7, 2011

Villares Metals International, the Dutch sales office of Villares Metals, Brazilian special steel mill producers, closed another great business contract during the Stainless Steel World Conference & Expo in Maastricht.

Stainless for ultramodern biogas plant

Stainless Steel World Publisher - December 2, 2011

Weltec Biopower is currently building an ultramodern biogas plant in Szeged with stainless steel from ThyssenKrupp Nirosta.

Walsin Lihwa to boost specialty steel capacity

Stainless Steel World Publisher - November 30, 2011

Walsin Lihwa Corporation will invest TWD 7 billion in the coming years to boost annual capacity of specialty steel and stainless steel across the Taiwan Straits from the current 1 million tonnes to a total of 1.5 million tonnes.

Where is the growth? State of the Industry Session

Stainless Steel World Publisher - November 19, 2011

We had the opportunity to sit in on the State of the Industry: Executive Outlook session with industry-leading executives from TRUMPF, Lincoln Electric, Schuler and DuPont Powder Coatings America.

Sulzer improves energy efficiency

Stainless Steel World Publisher - November 16, 2011

Sulzer’s Customer Support Services in Leeds (UK) and Sulzer Pumps Norway AS has won a contract for a retrofit-upgrade programme in Statoil’s Sleipner gas field based on their ability to achieve a much higher performance in a series of replacement cartridge pumps.

Flashback:

Stainless Steel World Publisher - November 7, 2011

From materials selection for Kokkola in 1999 to conducting a safety analysis in 2011, Mr Rune Strahl is the man to interview!

Amsterdam hosts a world of water:

Stainless Steel World Publisher - November 7, 2011

Check out who our video crew met during the recent Aquatech event.

Nebraska Legislature begins Keystone XL session

Stainless Steel World Publisher - November 3, 2011

Nebraska lawmakers began a special session on Tuesday to consider legislation that could affect regulation of TransCanada Corp.'s (TRP) Keystone XL pipeline and other pipeline projects that cross the state.

New duplex filter

Stainless Steel World Publisher - October 27, 2011

Schroeder Industries has released its RLD Series Top-ported duplex filter for return line applications. Certain hydraulic systems require continuous, uninterrupted operation. In this situation, shutting down the system to change the filter element is not an option.

Castle Metals UK appoints Phillips

Stainless Steel World Publisher - October 24, 2011

Castle Metals UK Limited has appointed James Phillips as their new Managing Director. James will succeed Ian Griffiths, the previous founder and Managing Director; Ian established Metals UK Limited in 2002 and sold the Metals UK Group of businesses to the US based AM Castle Group in 2007 after a rapid period of both organic and acquisitive growth.

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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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