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