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.

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

Sandvik returns to production after fire

Stainless Steel World Publisher -
Sandvik’s wire production facility in Sandviken, Sweden has begun its first production runs after a major fire attacked the facility. The fire took place on 14 April and continued on into 15 April 2011, destroying equipment and damaging parts. The pickling plant within the wire production facility was completely destroyed and some of the wire drawing machines were damaged. No one was injured.  After a complete assessment of the damage, work began immediately on decontaminating, cleaning, repairing and, where applicable, replacing the plant.

Outokumpu to deliver duplex for biogas tanks

Stainless Steel World Publisher -
Outokumpu will deliver stainless steel to Börger GmbH. The duplex will be used to build tanks required in biogas production. This order marks Outokumpu's first order for the newly launched duplex steel grade LDX 2404®.  The steel will be produced at the Outokumpu in Avesta, Sweden. LDX 2404® is the ideal choice for the tanks due to the high corrosion resistance and superior mechanical properties of the steel.

Sandvik Duplex now readily available

Stainless Steel World Publisher -
Sandvik Duplex now readily availableSandvik Sanmac™ SAF 2205 hollow bar is now readily available on short delivery time from Sandvik Materials Technology. The stock range includes duplex hollow bar from 32mm to 250mm outside diameter and in random length from 2.5m to 6m, as standard. Sandvik duplex stainless steel hollow bar offers a significant benefit to component manufacturers with possible cost reductions of more than 40%.

Sandvik appoints Technical Sales Manager

Stainless Steel World Publisher -
Sandvik Materials Technology UK has appointed Helen Harvey as its new Technical Sales Manager of Tubular Products. A Sandvik employee for more than 11 years, Harvey brings extensive knowledge of the company’s products and services to the table, in addition to previous managerial experience. She possesses an understanding of the Sandvik Materials Technology business platform
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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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