Svetlana M Yaguchi

US Patent:

20080000554, Jan 3, 2008

Filed:

Jun 25, 2007

Appl. No.:

11/768133

Inventors:

Svetlana Yaguchi - Renton WA, US
George Luksetich - Renton WA, US

Assignee:

JORGENSEN FORGE CORPORATION - Seattle WA

International Classification:

C22C 38/58

US Classification:

148327000

Abstract:

The alloys of the present invention provide austenitic, paramagnetic materials with high strength, ductility, and yield strength and good corrosion resistance in media with high chloride concentrations. Alloys of the present invention were developed because of the need by oilfield industries for superior materials. The alloys of the present invention may be used in drilling string components, and the tests performed demonstrate that such alloys exhibit properties balanced for very high yield strength, magnetic permeability, and corrosion resistance superior in every respect to presently available paramagnetic, high strength, corrosion resistant austenitic stainless steels.

US Patent:

20120014829, Jan 19, 2012

Filed:

Jun 9, 2011

Appl. No.:

13/157146

Inventors:

Svetlana Yaguchi - Renton WA, US
George Luksetich - Renton WA, US

Assignee:

Jorgensen Forge Corporation - Seattle WA

International Classification:

C22C 38/58
C22C 38/44
C22C 38/54
C22C 38/42

US Classification:

420 57

Abstract:

The alloys of the present invention provide austenitic, paramagnetic materials with high strength, ductility, and yield strength and good corrosion resistance in media with high chloride concentrations. Alloys of the present invention were developed because of the need by oilfield industries for superior materials. The alloys of the present invention may be used in drilling string components, and the tests performed demonstrate that such alloys exhibit properties balanced for very high yield strength, magnetic permeability, and corrosion resistance superior in every respect to presently available paramagnetic, high strength, corrosion resistant austenitic stainless steels.

US Patent:

44500084, May 22, 1984

Filed:

Dec 14, 1982

Appl. No.:

6/449608

Inventors:

Rockne J. Andreini - Redmond WA
Audley J. Farmer - Kent WA
Svetlana Yaguchi - Renton WA

Assignee:

Earle M. Jorgensen Co. - Seattle WA

International Classification:

C22C 3804

US Classification:

75128A

Abstract:

The present invention relates to a fully austenitic, nonmagnetic stainless steel which maintains the carbon concentration of the final steel near the solubility limit for carbon in the steel and adds columbium in an amount sufficient to stabilize the steel by columbium's preferential scavenging of carbon over chromium. This preferential scavenging substantially eliminates chromium carbide formation at grain boundaries in the solid solution of the final stainless steel product. A highly preferred stainless steel consists essentially of, by weight: 16-20% Manganese, 12-15% Chromium, 5. 0% Molybdenum max. , 2. 5% Nickel max. , 1. 0% Copper max. , 0. 75% Silicon max. , 0. 2-0.