John J Eckenrod, 874115 Duckhorn Dr, Moon Twp, PA 15108

4797252, Jan 10, 1989

Sep 19, 1986

6/910238

John J. Eckenrod - Coraopolis PA
Geoffrey O. Rhodes - Saxonburg PA
Kenneth E. Pinnow - Pittsburgh PA
William E. Royer - Lafayette NY

Crucible Materials Corporation - Pittsburgh PA

C22C 3840

420 42

A free-machining, austenitic stainless steel having low carbon plus nitrogen contents in combination with manganese and sulfur additions. The steel may have silicon of 0. 045 to 1. 00 percent.

4613367, Sep 23, 1986

Jun 14, 1985

6/744627

John J. Eckenrod - Coraopolis PA
Kenneth E. Pinnow - Pittsburgh PA
Geoffrey O. Rhodes - Sewickley PA
William E. Royer - Lafayette NY

Crucible Materials Corporation - Pittsburgh PA

C22C 3858

420 42

A chromium-nickel austenitic stainless steel having improved machinability resulting from low carbon and nitrogen contents, along with a high manganese to sulfur ratio. The composition of the steel consists essentially of, in weight percent, carbon plus nitrogen up to 0. 060, preferably up to 0. 049, and most preferred up to 0. 032, chromium 16 to 30, preferred 17 to 19, nickel 5 to 26, preferred 6 to 14, sulfur 0. 25 to 0. 45, manganese over 2 to about 7 and at least about eight times the sulfur content, balance iron and incidental impurities.

5841046, Nov 24, 1998

May 30, 1996

8/652686

Geoffrey O. Rhodes - Saxonburg PA
John J. Eckenrod - Moon Township PA
Frank J. Rizzo - McMurray PA
Michael W. Peretti - Washington PA
Ulrike Habel - Pittsburgh PA
William B. Eisen - Pittsburgh PA

Crucible Materials Corporation - Syracuse NY

C22C 3302

75246

A consolidated, fully dense, high yield strength, austenitic stainless steel and article produced therefrom having improved pitting resistance and a low sigma solvus temperature. The article is produced from nitrogen gas atomized prealloyed particles. The steel and article have a high nitrogen content for increased strength and corrosion resistance.

4933142, Jun 12, 1990

Feb 3, 1989

7/306216

Walter T. Haswell - Jamesville NY
Kenneth E. Pinnow - Pittsburgh PA
John J. Eckenrod - Coraopolis PA
Geoffrey O. Rhodes - Saxonburg PA

Crucible Materials Corporation - Pittsburgh PA

C22C 3840
C22C 3860

420 42

A low carbon plus nitrogen, free-machining, austenitic stainless steel having improved machinability and excellent corrosion resistance. The steel composition in weight percent is carbon plus nitrogen up to about 0. 06, chromium 16 to 20, nickel 6 to 14, manganese up to 0. 60, sulfur 0. 15 to 0. 50, silicon up to about 1, phosphorus up to about 0. 20, molybdenum up to about 1 and balance iron.

4942922, Jul 24, 1990

Oct 18, 1988

7/259520

Lawrence S. Redmerski - McKees Rocks PA
Kenneth E. Pinnow - Pittsburgh PA
John J. Eckenrod - Coraopolis PA

Crucible Materials Corporation - Pittsburgh PA

F28F 2108

1651341

Welded ferritic stainless steel tubing having high resistance to hydrogen embrittlement particularly adapted for use in heat exchangers handling chemical media containing hydrogen sulfide or nascent hydrogen and in cathodically protected heat exchangers. The ferritic stainless steel of the welded tubing consists essentially of, in weight percent, carbon at least 0. 002, nitrogen at least 0. 002, carbon plus nitrogen 0. 02 max. and preferably 0. 01 to 0. 02, chromium 23 to 28, preferably 25 to 28, manganese up to 1, preferably up to 0. 5, nickel 1 to 4, silicon up to 1, preferably up to 0. 5, phosphorus up to 0. 04, sulfur up to 0. 02, preferably up to 0. 005, molybdenum 2 to 5, preferably 2 to 4, aluminum up to 0. 1, columbium 0. 60 max. with columbium being at least equal to eight times carbon plus nitrogen, and the balance iron and incidental impurities.

4421557, Dec 20, 1983

Oct 26, 1982

6/436873

Paul A. Rossomme - Midland PA
John J. Eckenrod - Coraopolis PA
Curtis W. Kovach - Pittsburgh PA
Kenneth E. Pinnow - Pittsburgh PA

Colt Industries Operating Corp. - Pittsburgh PA

C22C 3816
C22C 3820
C22C 3822
C22C 3842

75125

An austenitic stainless steel having good corrosion resistance, particularly in chloride environments; this is achieved by the use of a rare earth element, preferably lanthanum, singly or in combination with nitrogen, along with nickel and molybdenum at relatively low levels for an austenitic stainless steel. The composition includes 15 to 25% chromium, greater than 16 to 25% nickel, 3 to 7% molybdenum, with a rare earth element consisting of lanthanum within the range of 0. 005 to 0. 05% in combination with 0. 1 to 0. 5% nitrogen.

4769213, Sep 6, 1988

Aug 21, 1986

6/898487

Walter T. Haswell - Jamesville NY
Kenneth E. Pinnow - Pittsburgh PA
Geoffrey O. Rhodes - Saxonburg PA
John J. Eckenrod - Coraopolis PA

Crucible Materials Corporation - Pittsburgh PA

C22C 3820

420 61

A chromium-nickel-copper, age-hardenable martensitic stainless steel having improved machinability in the solution-treated and also in the age-hardened condition. The steel has carbon plus nitrogen up to 0. 08%, preferably 0. 05 or 0. 035% for purposes of improved machinability.

4784828, Nov 15, 1988

Aug 21, 1986

6/898488

John J. Eckenrod - Coraopolis PA
Geoffrey O. Rhodes - Saxonburg PA
Kenneth E. Pinnow - Pittsburgh PA
William E. Royer - Lafayette NY

Crucible Materials Corporation - Pittsburgh PA

C22C 3840
C22C 3860

420 42

A resulfurized, chromium-nickel austenitic stainless steel having improved machinability resulting from low carbon and low nitrogen contents in combination with manganese and sulfur additions. The composition of the steel consists essentially of, in weight percent, carbon plus nitrogen total up to 0. 065, preferably up to 0. 040 or 0. 056, chromium 16 to 30, preferably 17 to 19, nickel 5 to 26, preferably 6 to 14, sulfur 0. 10 to 0. 45, preferably 0. 10 to 0. 25, more preferably 0. 25 to 0. 45, manganese 0. 75 to 2. 0, silicon up to 1, phosphorus up to about 0. 20, molybdenum up to 1. 0 and copper up to 1. 00, and balance iron and incidental impurities.