8630 Mod

Low Alloy Steel typically used in wellheads, blow out preventers and other applications needing good hardenability to maintain yield strength through thick cross-sections. It can be used in limited sour environments when  ordered to  meet NACE MR0175 requirements for hardness max of 22 HRC.

8630 Mod Specification/Condition

  • ASTM A322/ASTM A788 / NACE MR0175

8630 Mod applications

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

8630 Mod technical data

  • UTS (KSI): 105 Min
  • Yield 0.2% Offset (KSI): 80 Min
  • EL (% Min): 20
  • RA (% Min): 25
  • Hardness (HRC): 22
  • Charpy Impact Min. ft-lbs: 40@-20oF

8630 Mod dimensions

  • 9.0-19.5 in

8630 Mod Chemical composition (Wt %)

Carbon(C)Manganese(Mn)Phosphorus(P)Sulfur(S)Silicon(Si)Nickel(Ni)Cobalt(Co)
0.28-0.33 Max0.7-1.0 Max0.040 Max0.040 Max0.20-0.35 Max0.40-1.10
Chromium(Cr)Manganese(Mo)Niobium + Tantalum(Nb (Cb) + Ta)Titanium(Ti)Copper(Cu)Aluminum(Al)Iron (Fe) & Others
0.40-1.750.15-0.50Fe– Balance
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