High Alloy Materials
    Super Duplex Stainless



    Duplex Stainless Steels Available

    Haohua Industrysupplies LDX2101, 2205, Ferralium 255, Zeron 100 and LDX2507 in the form of plate, sheet, strip, bar, pipe, tubing, pipe fittings, flanges and weld wire.


    Duplex Stainless Steel Overview

    Duplex Stainless Steels, also referred to as austenitic-ferritic stainless steels, are a family of grades with about equal proportions of ferrite and austenite. These steels have a duplex microstructure which contributes to their high strength and high resistance to stress corrosion cracking. Due to their high content of chromium, nitrogen and molybdenum, duplex steels offer good resistance to local and uniform corrosion. Duplex stainless steels have good weldability.

    Today, modern duplex stainless steels can be divided into three groups:
    Lean Duplex such as LDX2101
    Standard Duplex such as 2205, the work-horse grade accounting for more than 80% of duplex usage
    Super Duplex such as Ferralium 255 and  Zeron 100 and LDX2507 

    Of the duplex grades, duplex 2205 is the most widely used. However, the super duplex steels like Zeron® 100 and LDX2507 are excellent for servicing severe corrosive environments, such as offshore and marine applications.  Lean duplex 2101 is available as an economic alternative to 300 series stainless steels.

    What are the Characteristics of Duplex Stainless Steels?
    Very good resistance to uniform corrosion
    Very good resistance to pitting and crevice corrosion
    High resistance to stress corrosion cracking and corrosion fatigue
    High mechanical strength
    Good sulfide stress corrosion resistance
    Good abrasion and erosion resistance
    Good fatigue resistance high energy absorption
    Low thermal expansion
    Good weldability

    In what Applications are Duplex Stainless Steels® used?
    Oil and gas equipment
    Offshore technology
    Seawater desalination plants
    Chemical industry, especially when handling chlorides
    Flue-gas cleaning
    Desalination plants and seawater systems
    Pulp and paper industry
    Cargo tanks and pipe systems in chemical tankers
    Firewalls and blast walls on offshore platforms
    Storage tanks
    Pressure vessels, reactor tanks, and heat exchangers
    Rotors, impellers and shafts


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