Title:
HIGH STRENGTH STEEL HAVING SUPERIOR RESISTANCE TO SULFIDE STRESS CORROSION CRACKING
Document Type and Number:
Japanese Patent JPS6070164
Kind Code:
A
Abstract:
PURPOSE: To obtain a high strength steel having high resistance to sulfide stress corrosion cracking by adding specified percentages of C, Si, Mn, Cr, Mo and Al to Fe.
CONSTITUTION: A steel consisting of, by weight, 0.10W0.40% C, 0.05W0.50% Si, 0.30W1.00% Mn, 0.3W1.2% Cr, 0.15W0.70% Mo, 0.5W2.0% Al and the balance Fe with inevitable impurities or further contg. 0.005W0.030% Ti and 0.0005W 0.0030% B is prepd. To the steel may be added 0.005W0.050% Nb. The steel is a high strength steel having ≥ about 70kgf/mm2 yield strength and such a high resistance to sulfide stress corrosion cracking that the steel can be used as the material of an oil well pipe in a sour environment.
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Inventors:
OKAZAWA SUSUMU
TOOMOYA YOSHI
TOOMOYA YOSHI
Application Number:
JP17770083A
Publication Date:
April 20, 1985
Filing Date:
September 26, 1983
Export Citation:
Assignee:
SUMITOMO METAL IND
International Classes:
C22C38/00; C22C38/22; C22C38/32; (IPC1-7): C22C38/22; C22C38/32
Domestic Patent References:
| JPS585417A | 1983-01-12 | |||
| JPS5853614A | 1983-03-30 | |||
| JPS4938768A | 1974-04-11 | |||
| JP16005434A | ||||
| JPS575848A | 1982-01-12 | |||
| JPS5252114A | 1977-04-26 |
Attorney, Agent or Firm:
Kazuo Tomita
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