Oil Country Tubular Goods or a line pipe formed of a high-streng

Details Oil Country Tubular Goods or a line pipe formed of a high-streng Oil Country Tubular Goods or a line pipe formed of a high-streng

1990-02-15

1991-09-17

Yee, Deborah

Stock material or miscellaneous articles

All metal or with adjacent metals

Workpiece with longitudinal passageway or stopweld material

148909, 148136, 420 90, 420103, 420104, C22C 3820

Patent

active

050492101

ABSTRACT:
A high-strength martensitic stainless steel excellent in corrosion resistance and stress corrosion cracking resistance, the composition of which comprises: 0.1% or less carbon, 1% or less silicon, 2% or less manganese, 8-14% chromium, 1.2-4.5% copper, 0.005-0.2% aluminum, 0.01-0.15% nitrogen, and the balance of iron except incidental elements. The stainless steel can contain nickel, molybdenum, tungsten, vanadium, titanium, niobium, etc. under the fixed conditions in addition to the above elements. The heat treatment of the stainless steel comprises: the step of austenitizing at temperatures of 920.degree. C. to 1,000.degree. C., the step of cooling at a cooling rate equal to or higher than the air cooling rate, the step of tempering at temperatures between 580.degree. C. and A.sub.cl point, and the step of cooling at a cooling rate higher than the air cooling rate.

REFERENCES:
patent: 4326885 (1982-04-01), Larson et al.
patent: 4769213 (1988-09-01), Haswell, Jr. et al.

Affiliated with

Also associated with

Rating

Oil Country Tubular Goods or a line pipe formed of a high-streng does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oil Country Tubular Goods or a line pipe formed of a high-streng, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil Country Tubular Goods or a line pipe formed of a high-streng will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1914704