F22 NQT - UNS K21590

     

    F22 is a Low Alloy Steel which meets NACE MR0175 requirements for sour service environments whwn heat treated to a maximum hardness of of 22 HRC. F22 has very good through hardenability allowing uniform properties across thick cross-sections. It is usually used in oil field equipment for wellheads, BOPs, hangers and valves.

     

    F22 NQT Specification/Condition

    • ASTM A182 / NACE MR0175

    F22 NQT applications

    • wellhead applications in oil patch, such as connectors, hangars and
      block valves

    F22 NQT technical data

    • UTS (KSI): 95 Min
    • Yield 0.2% Offset (KSI): 75 Min
    • EL (% Min): 18
    • RA (% Min): 35
    • Hardness (HRC): 22
    • Charpy Impact Min. ft-lbs: –

    F22 NQT dimensions

    • 12.25-23.75 in

    F22 NQT Chemical composition (Wt %)

     

    Carbon
    (C)
    Manganes
    (Mn)
    Phosphorus
    (P)
    Sulfur
    (S)
    Silicon
    (Si)
    Nickel
    (Ni)
    Cobalt
    (Co)
    0.05-0.15 Max 0.30-0.60 Max 0.040 Max 0.040 Max 0.50 Max

     

    Chromium
    (Cr)
    Manganese
    (Mo)
    Niobium + Tantalum
    (Nb (Cb) + Ta)
    Titanium
    (Ti)
    Copper
    (Cu)
    Aluminum
    (Al)
    Iron (Fe) & Others
    2.0-2.5 0.87-1.13 Fe– Balance, V– 0.050 Max

     

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