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 Max0.30-0.60 Max0.040 Max0.040 Max0.50 Max
Chromium(Cr)Manganese(Mo)Niobium + Tantalum(Nb (Cb) + Ta)Titanium(Ti)Copper(Cu)Aluminum(Al)Iron (Fe) & Others
2.0-2.50.87-1.13Fe– Balance, V– 0.050 Max
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