Steel tube alloy

Details Steel tube alloy Steel tube alloy

1991-08-28

1993-07-13

Yee, Deborah

Metal treatment

Stock

Ferrous

148909, C22C 3812, C22C 3804

Patent

active

052269787

ABSTRACT:
Seamless steel tubes suitable for use as grades of casing and line pipe having yield strengths in excess of 70,000 psi, without being heat treated, are made of an alloy comprising, by weight, about 0.10% to 0.18% carbon, about 1.0% to 2.0% manganese, about 0.10% to 0.16% vanadium, about 0.008% to 0.012% titanium and about 150 parts per million to 220 parts per million nitrogen, the balance comprising iron and incidental impurities. Strains are applied to the shell in a stretch reducing mill below the T.sub.nr of the steel and above the A.sub.r3 to provoke dynamic recrystallization. The nitrogen and vanadium are preferably introduced to the steel during alloying in the form of a VN alloying agent. The vanadium, titanium and nitrogen are predominantly present as vanadium nitride and titanium nitride. The steel may also comprise 0.03% to 0.05% aluminum by weight.

REFERENCES:
patent: 3773500 (1973-11-01), Kanazawa et al.
"Laboratory Simulation of Seamless Tube Piercing and Rolling Using Dynamic Recrystallization Schedules", Pussegoda et al, Metallurgical Transactions A., Jan. 1990, vol. 21A, pp. 153-164.
"Recrystallization Controlled Rolling of Seamless Tubing" Barbosa et al, 1986.

Affiliated with

Also associated with

Rating

Steel tube alloy does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Steel tube alloy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Steel tube alloy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2308998