Duplex

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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.

    Discover the latest innovations in duplex technology with our exclusive Duplex World Update. Download this comprehensive 3-part series now and gain valuable insights from industry experts on groundbreaking applications and developments in duplex material science.

    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.

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    Cummins engine available on Lincoln welder

    Stainless Steel World Publisher -
    The Lincoln Electric Company’s Commander™ 500 multi-process, engine-driven welder/generator now offers contractors the choice of the Cummins engine.

    Hoke Gyrolok range available in stainless

    Stainless Steel World Publisher -
    The Hoke Gyrolok range of instrumentation fittings is now available from Circor in a new line including 316 stainless steel, brass, carbon steel, Monel, Carpenter 20, Hastelloy C276, Inconel, Titanium, 254 SMO, Duplex 2205 and Super Duplex.

    Alloy integrated fluid system solution

    Stainless Steel World Publisher -
    A challenge posed by the oil and gas industry and an ambitious product development relationship between Sandvik Steel AB and Swagelok Company has led to a new SAF 2507 alloy integrated fluid system solution that performs in highly corrosive, chloride-containing environments, such as oil and gas exploration and production activities.

    On-site lock re-coding for valve interlocks

    Stainless Steel World Publisher -
    Smith Flow Control has introduced a new series of valve interlocks made of stainless steel.
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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.

    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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