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    Super 13CR

    SUPER 13 CHROME(13-5-2): ASTM A-276, & ASTM A-484

    GENERAL SCOPE:

    There are several proprietary Super 13 Chrome grades available in the market today. The most common are UNS S41425, S41426, & S41427. These grades are used in oilfield environments that contain CO2, and low concentrations of H2S.


    Chemical Composition:

    UNS-41425

    C Mn P S Si Cr Ni Mo
    Minimum   0.500       12.500 4.500 1.600
    Maximum 0.030 1.000 0.020 0.005 0.500 14.000 6.000 2.000

    UNS-41426

    C Mn P S Si Cr Ni Mo
    Minimum           11.500 4.500 1.500
    Maximum 0.030 0.500 0.020 0.005 0.500 13.500 6.000 2.500

    UNS-41427

    C Mn P S Si Cr Ni Mo
    Minimum           11.800 4.500 1.600
    Maximum 0.030 1.000 0.020 0.005 0.500 13.500 6.000 2.500

    COMMONLY STOCKED STRENGTH LEVELS:

    95,000 psi minimum yield- limited to a Rockwell C - 28/29 maximum
    110,000 psi minimum yield - limited to a Rockwell C -32 maximum

    COMMONLY STOCKED MATERIAL FORMS:

    Rolled bar
    Forged bar
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