The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 1984
Filed:
May. 09, 1983
Applicant:
Inventors:
Kazuo Fujiwara, Kobe, JP;
Haruo Tomari, Hyogo, JP;
Osamu Aritomi, Shimonoseki, JP;
Nobuhiro Sato, Shimonoseki, JP;
Assignee:
Kabushiki Kaisha Kobe Seiko Sho, Kobe, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
75125 ; 7512 / ; 7512 / ; 7512 / ;
Abstract
Disclosed herein is a dual phase stainless steel suitable for use in sour wells. It comprises 0.06-0.20% C, .ltoreq.1.0% Si, 2.5-4% Mn, 20-27% Cr, 5-8% Ni, 2.5-4% Mo, 0.3-2% Cu, 0.1-0.25% N, 40-60% ferrite and the balance Fe and inevitable impurities. It may further contain one or more metals selected from Ti, Nb and V in a total amount of 0.1% to 0.5%. The dual phase stainless steel is excellent in proof strength, tensile strength and elongation and is capable of exhibiting good corrosion resistance in Cl.sup.- --CO.sub.2 --H.sub.2 S environments.