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 Max 0.7-1.0 Max 0.040 Max 0.040 Max 0.20-0.35 Max 0.40-1.10

 

Chromium
(Cr)
Manganese
(Mo)
Niobium + Tantalum
(Nb (Cb) + Ta)
Titanium
(Ti)
Copper
(Cu)
Aluminum
(Al)
Iron (Fe) & Others
0.40-1.75 0.15-0.50 Fe– Balance

 

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