8630 MOD - voestalpine Specialty Metals UK

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	–

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

0.20-0.35 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

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