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.

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

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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.

Norsok Approves Sandvik Super-Duplex Solid Bar

Stainless Steel World Publisher -
Sandvik has achieved NORSOK® certification for its duplex and new super-duplex solid bar opening up greater application opportunities as they all meet the exacting demands and standards of the oil & gas industry. Extensive work by Sandvik has resulted in the new NORSOK® M-630, Edition 6 accreditation being secured for duplex solid bar grades Sandvik SAF 2205™ and Sandvik SAF 2507™.

New superduplex from Ugitech meets NORSOK standards

Stainless Steel World Publisher -
Ugitech, part of the SCHMOLZ + BICKENBACH Group, has expanded its product portfolio to include the UGI® 4410 superduplex stainless steel.

Sandvik launches Pressurfect for GDI tubing

Stainless Steel World Publisher -
Sandvik is launching the next generation of gasoline direct injection (GDI) engine components for lighter, more energy efficient cars with low emission engines.

Langley Alloys shifts to new premises in Singapore

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Langley Alloys South East Asia, recently relocated to 9B Jalan Ampas, Singapore, as part of its strategic development plan. The company is expanding its operations rapidly in South East Asia and has now installed cutting facilities to support local customers.

Sun Valley selects Axium Process’ filters

Stainless Steel World Publisher -
Sun Valley, supplier of quality processed and raw nuts to European retailers and major blue chip manufacturers, recently purchased a number of bespoke filter systems designed and manufactured by filtration specialist Axium Process. The company, which traditionally used a sheet filter system for removing nutshell debris from oils, was looking for a flexible system capable of filtering from 2000micron down to 50micron that would require only a small footprint as well as being easy to maintain and clean.
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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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