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Nickel Alloy 904L

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Nickel Alloy 904L

ASTM B677, B366
ASME SB677, SB366

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Nickel Alloy 904L Composition

Ni 23 - 28%, Mo 4 - 5%, Cr 19 - 23%, Cu 1 - 2%, C 0.02%, Mn 2%, S 0.035%, Si 1%,
P 0.045%, Fe Balance

    Nickel Alloy 904L Description

    904L is a high-alloy austenitic stainless steel with low carbon content. The grade is intended for use under severe corrosive conditions. It has been application proved over many years and was originally developed to resist corrosion in dilute sulfuric acid. It is standardized and approved for pressure vessel use in several countries. Structurally, 904L is fully austenitic and is less sensitive to precipitation ferrite and sigma phases than conventional austenitic grades with high molybdenum content. Characteristically, due to the combination of relatively high contents of chromium, nickel, molybdenum and copper 904L has good resistance to general corrosion, particularly in sulfuric and phosphoric conditions.

    Nickel Alloy 904L Applications

    Production and transport of sulfuric acid
    Metal pickling in sulfuric acid
    Production and concentration of phosphoric acid
    Use in seawater, brackish water, condensers, heat exchangers and pipe work in general
    Paper and allied industries
    Gas washing
    Chemical and pharmaceutical industries


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