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.

CENTRAVIS’ tubes meet German standards

Stainless Steel World Publisher -
TÜV Rheinland Group has confirmed that CENTRAVIS met all requirements in the production of duplex steel tubes and has been granted the VdTUV 418 certification. CENTRAVIS, a global supplier of high quality stainless tubes, has confirmed that its duplex tubes are produced in accordance with German industrial standards. According to CENTRAVIS, this certification will ensure a 45% increase in the sale of duplex tubes in the German market. Photo courtesy of CENTRAVIS "Obtaining the TÜV Rheinland Group certificate will strengthen the company's position with regards to the supply of duplex steel tubes to Germany, where the company's products are in high demand,” said Head of Centravis Sales Germany, Nicholai Rosenthal.

Raccortubi Group opens new UK office

Stainless Steel World Publisher -
Raccortubi are pleased to announce the establishment of the Group’s newest addition: a branch office in the United Kingdom.

Raccortubi UK has been set up in order to provide Raccortubi Group with a local presence in the United Kingdom so as to better serve EPC contractors, fabricators and blue chip companies in the region.

High grade welding consumables

Stainless Steel World Publisher -
BS FIXINGS produces stainless steel wire which adheres to the demanding specifications set out in AWS A5.9 and EN 14343, as well as ISO 9001 accreditation.

Outokumpu delivers 245 tons of duplex

Stainless Steel World Publisher -
Outokumpu has delivered one of the largest orders of 245 tons of Forta LDX 2101 lean duplex stainless steel for the construction of three big oil storage tanks at the Antwerp harbor in Belgium.

Stainless UK giant bars for Scottish quay

Stainless Steel World Publisher -
Stainless UK have supplied 23 giant solid round stainless steel bars with a 5” diameter and 3m length for the construction of an extension to the quay at Campbeltown Harbour in Scotland.

POSCO partners with Geumgang to develop water reservoir

Stainless Steel World Publisher -
POSCO, a multinational steel-making company headquartered in Pohang, South Korea, signed a memorandum of understanding with Geumgang, a South Korean manufacturer of stainless steel water tanks and water pipes, on co-development and structure analysis of stainless steel water tanks for large-scale water reservoirs. Photo courtesy of POSCO The existing large-scale water reservoirs are made of concrete, causing problems such as water leakage due to cracks and an unsanitary water supply environment.

NORSOK approval for SXP seamless Super Duplex Pipe

Stainless Steel World Publisher -
Schulz Xtruded Products, the most recent addition to the Schulz Group of Companies, are renowned for hot extruded and cold worked seamless pipes from 1” up to 16” NPS in all sorts of CRA and Nickel grades.

Anil Metals is Sandvik’s distribution partner

Stainless Steel World Publisher -
Sandvik Materials Technology has signed an agreement with Anil Metals to become the official distributor of its stainless steel round bar products in India. The agreement will be integral to expanding Sandvik’s business and sales in India.

SPE Offshore – offshore stainless steel suppliers

Stainless Steel World Publisher -
Representatives from BS Stainless will attend SPE Offshore in Aberdeen in September 2015 to discuss its range of stainless steel products, designed to facilitate complex and delicate offshore work, required in the oil & gas industries.

Duplex Self Tapping Screws Are Perfect Fasteners

Stainless Steel World Publisher -
Corrosion is an ever-present threat to many metal structures, particularly those located in marine environments such as offshore oil and gas facilities. Grade 316 stainless steel screws are widely used in the construction of such facilities and is being superseded by tougher, longer-lasting duplex self tapping screws.
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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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