Grade S31803 - F51 duplex stainless steel

Duplex Steel F51 (UNS S31803)
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  • F51

    UNS

    ID

    Trademark

    JIS

    W.Nr

    S31803

    F51

    AL2205

    SUS32953L

    1.4462

    F51 Chemical composition

    Alloy

    %

    Ni

    Cr

    Fe

    Mo

    N

    C

    Mn

    Si

    S

    Cu

    F51

    Min.

    4.5

    21

    Balance

    2.5

    0.08

     

     

     

     

     

    Max.

    6.5

    23

    3.5

    0.2

    0.03

    2

    1

    0.02

    0.03

    F51 minimum mechanical properties in the room temperature

    Alloy status

    Tensile strength
    Rm N/mm²

    Yield strength

    RP0.2 N/mm²

    Elongation
    A5 %

    Brinell hardness HB

    Solution treatment

    620

    450

    25

    290

    F51 Characteristic as below:
    This alloy resists chloride environments and sulphide stress corrosion and is roughly double the strength of standard austenitic stainless steels. This alloy can be used successfully as an alternative to 300 series austenitic stainless steel in most applications where higher mechanical strength/lower weight is required. F51 is readily weldable using many of the standard electric arc welding processes but oxyacetylene welding is not recommended because carbon pickup in the weld metal may occur.

     

    F51 Application field
    Typical applications include pumps, valves, flanges and pipework with various applications in the oil & gas, chemical, power and brewing industries.

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