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PRODUCTS    NICKEL & NICKEL ALLOYS    Hastelloy B2

Hastelloy B2

Hastelloy B2 is nickel-molybdenum alloy with lower carbon compared with Hastelloy B, which exhibits superior resistance to hydrochloric acid, aluminum chloride catalysts, and other strongly reducing chemicals.
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  • Hastelloy B2

    Hastelloy B2 is nickel-molybdenum alloy with lower carbon compared with Hastelloy B, which exhibits superior resistance to hydrochloric acid, aluminum chloride catalysts, and other strongly reducing chemicals.

    Hastelloy B2 is suitable for most chemical process applications in the as-welded condition. Well suited for equipment handling hydrochloric acid in all concentrations and temperatures. Resistant to hydrogen chloride gas and sulfuric, acetic, and phosphoric acids. Principal high-temperature uses are those in which a low coefficient of thermal expansion is required.

    Exposure to temperatures of 540 to 815 °C (1000–1500 °F) should be avoided because of a reduction in the ductility of the alloy. In oxidizing gases such as air, Hastelloy B2 produced by NiWire can be used at temperatures up to 540 °C (1000 °F). In reducing gases or in vacuum, the alloy can be used from 815 °C (1500 °F) to substantially higher temperatures. Ferric or cupric salts might develop when hydrochloric acid comes in contact with iron or copper, so Hastelloy B2 should not be used with copper or iron piping in a system containing hydrochloric acid.

     

    Hastelloy B-2

    UNS

    Trademark

    W.Nr

    N10665

    HastelloyB2

    2.4617

    Hastelloy B-2 Chemical compostion:

    Alloy

    %

    Ni

    Mo

    Fe

    Cr

    Co

    C

    Mn

    V

    Si

    P

    S

    Hastelloy B-2

    Min.

    Balance

    26

     

     

     

     

     

    0.2

     

     

     

    Max.

    30

    2.0

    1.0

    1.0

    0.02

    1.0

    0.4

    0.1

    0.04

    0.03

    Hastelloy B-2 Physical properties:

    Density

    9.24g/cm3

    Melting point

    1330-1380

    Hastelloy B-2 Alloy minimum mechanical properties in the room temperature:

    Alloy state

    Tensile strength
    Rm N/mm2

    Yield strength
    RP0.2 N/mm2

    Elongation

    A5 %

    Hastelloy B-2

    690

    310

    40

    Hastelloy B-2 Characteristic
    1. Control of iron and chromium content to a minimum to prevent the generation of β-phase Ni4Mo.
    2. Excellent corrosion resistance of restore environment.
    3. An excellent resist to concentration sulfuric acid medium and large number of non-oxidizing acid corrosion.
    4. A very good resistance of chloride reduction of stress corrosion cracking (SCC).
    5. Good corrosion resistance of various organic acids.

    Metallurgical structure
    Hastelloy B-2 is the face-centered cubic lattice structure. By controlling the content of iron and chromium at the minimum to reduce the processing brittle, prevent Ni4Mo precipitation during 700-870 .

    Corrosion resistance
    Ni-Mo alloy Hastelloy B-2, the carbon and silicon content is extremely low, reducing the HAZ carbon and other impurities precipitation, so the weld has sufficient corrosion resistance. Alloy Hastelloy B-2 in the reduction of medium with very good corrosion resistance, such as a various temperature and concentration of hydrochloric acid. In the middle of the concentration of sulfuric acid solution (or contain a certain amount of chloride ions) also has very good corrosion resistance. At the same time can be used to acetic acid and phosphoric acid environment. Alloy material suitable only in the metallurgical structure and pure crystal structure in order to have the best corrosion resistance.

    Applied field
    Alloy Hastelloy B-2 with a wide range of applications in the field of chemical, petrochemical, energy manufacturing and pollution control , particularly in the sulfuric acid, hydrochloric acid, phosphoric acid, acetic acid, and other industries.

     

     

     

     

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