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    High Alloy Materials
    Super Duplex 2507

    SUPER DUPLEX 2507

    UNS S32750

     

    Forms of Super Duplex 2507 Available at Haohua IndustryDuplex 2507 Bar

    Sheet
    Plate
    Bar
    Pipe & Tube (welded & seamless)
    Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples) 
     

    Duplex 2507 Overview

    Duplex 2507 is a super duplex stainless steel designed for applications which demand exceptional strength and corrosion resistance. Alloy 2507 has 25% chromium,4% molybdenum, 7% nickel. This high molybdenum, chromium and nitrogen content results in excellent resistance to chloride pitting and crevice corrosion attack and the duplex structure provides 2507 with exceptional resistance to chloride stress corrosion cracking. 

    Usage of Duplex 2507 should be limited to applications below 600° F (316° C). Extended elevated temperature exposure can reduce both the toughness and corrosion resistance of alloy 2507.

    Duplex 2507 possesses excellent mechanical properties. Often a light gauge of 2507 material can be used to achieve the same design strength of a thicker nickel alloy. The resulting savings in weight can dramatically reduce the overall cost of fabrication.

     

    Corrosion Resistance

    2507 Duplex is highly resistant to uniform corrosion by organic acSuper Duplex 2507 Plateids such as formic and acetic acid. It is alsohighly resistant to inorganic acids, especially if they contain chlorides.  Alloy 2507 is highly resistant to carbide-related intergranular corrosion.  Due to the ferritic portion of the duplex structure of the alloy it is very resistant to stress corrosion cracking in warm chloride containing environments. Through additions of chromium, molybdenum and nitrogen localized corrosion such as pitting and crevice attack are improved.  Alloy 2507 has excellent localized pitting resistance.

     

    What are the characteristics of Duplex 2507?

    High resistance to chloride stress corrosion cracking
    High Strength
    Superior resistance to chloride pitting and crevice corrosion
    Good general corrosion resistance
    Suggested for applications up to 600° F
    Low rate of thermal expansion
    Combination of properties given by austenitic and ferritic structure
    Good weldability and workability
     

     

    Chemical Composition, %

    Cr

    Ni

    Mo

    C

    N

    Mn

    24.0-26.0

    6.0-8.0

    3.0-5.0

    0.030 Max

    .24-.32

    1.20 Max

    Si

    Cu

    P

    S

    Fe

     

    0.80 Max

    0.50 Max

    0.035 Max

    0.020 Max

    Balance

     

     

    In what applications is Duplex 2507 used?

    Desalination Equipment
    Chemical process pressure vessels, piping and heat exchangers
    Marine Applications
    Flue Gas Scrubbing Equipment
    Pulp & Paper Mill Equipment
    Offshore Oil production/technology
    Oil and gas industry equipment
     

    ASTM Specifications

    Pipe Smls

    Pipe Welded

    Tube Smls

    Tube Welded

    Sheet/Plate

    Bar

    Flanges & Fittings

    A790

    A790

    A789

    A789

    A240

    A276

    A182

     

    Mechanical Properties
    Specified Tensile Properties, Plate ASTM A240

    Ultimate Tensile Strength, ksi Minimum

    .2% Yield Strength, ksi Minimum

    % Elongation Min.

     

    116

    80

    15

    310

     

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