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.

Stainless pipe plant

Stainless Steel World Publisher -
Italy-based Marcegaglia Group has invested in a new stainless pipe and flat steel service center in Vladimir. The new establishment will produce about 35,000tns of steel per year, with an expected turnover of EUR 130 million,

POSCO now No. 2 stainless maker globally

Stainless Steel World Publisher -

POSCO is now the world’s No. 2 stainless steel producer, after expanding the capacity of its Chinese stainless steel JV. The company also intends to list the JV in Hong Kong or Shanghai after 2013. Zhangjiagang Pohang Stainless Steel (ZPSS) has completed construction on additional facilities

Tonteri new EVP Specialty Stainless for Outokumpu

Stainless Steel World Publisher -
Outokumpu has appointed Jarmo Tonteri as the new EVP Specialty Stainless and member of Outokumpu Group's Executive Committee, effective 1 August 2011. He will report to Mika Seitovirta, the CEO of the company.

Sumitomo develops CR steel with tin

Stainless Steel World Publisher -

Sumitomo Metal Industries, Ltd. (Sumitomo Metals) has created a new corrosion-resistant steel with tin (Sn) that can be used in salt-containing environments or cold climates where anti-freezing agents are sprayed.

Duplex for road project viaduct

Stainless Steel World Publisher -
Outokumpu has delivered duplex stainless steel rebar to the construction of the traffic route Norra Länken in Stockholm, Sweden. Norra Länken is a large infrastructure investment in a new traffic route around

Heavy Rare Earths price doubles in two weeks

Stainless Steel World Publisher -

After an assessment conducted by Industrial Minerals, results have shown that the price of heavy rare earth elements (REE) has more than doubled over the last two weeks. Dysprosium oxide, used in magnets, lasers and nuclear reactors, has increased from a level of USD 700-USD 740/kg, to a top level of USD 1470/kg.

Molybdenum use reaches new heights

Stainless Steel World Publisher -

According to new full-year figures from the International Molybdenum Association, the global use of molybdenum has rocketed to a new high of 474 million lbs, exceeding the peak use of 470 million lbs in 2007. China had the greatest demand for molybdenum in 2010;

BUTTING opens new production centre

Stainless Steel World Publisher -
BUTTING has officially opened their new 130,000m² production centre in Tieling, China. The opening took place in the presence of the regional party chairman, the managing directors of BUTTING, Mr. Hermann Butting and Mr. Markus Bartsch, and the managers of BUTTING China

Outokumpu delivers stainless to rebuild dam

Stainless Steel World Publisher -
Outokumpu will deliver special stainless steel for the project to rebuild the dam in Tammerkoski rapids. All of the main structural parts of the sluice and flood gates will be made using Outokumpu's lean duplex LDX 2101®

TDW completes subsea intervention

Stainless Steel World Publisher -
T.D. Williamson SA (TDW) has completed a subsea hot tap intervention operation to facilitate the successful tie-in of a new gas pipeline to an existing pipeline. The new pipeline forms a portion of the Burullus Gas Company’s West Delta Deep Marine (WDDM) Phase VII development project
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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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