John A Magee

US Patent:

20070025873, Feb 1, 2007

Filed:

Jul 29, 2005

Appl. No.:

11/192246

Inventors:

John Magee - Reading PA, US

International Classification:

C22C 38/22

US Classification:

420061000

Abstract:

A corrosion resistant, martensitic steel alloy having very good cold formability is described. The alloy has the following weight percent composition. The balance of the alloy is essentially iron. Nickel and copper are balanced in the alloy such that the ratio Ni/Cu is less than 0.2. A second embodiment of the alloy contains at least about 0.005% sulfur, selenium, or a combination thereof to provide good machinability.

US Patent:

57889228, Aug 4, 1998

Filed:

May 2, 1996

Appl. No.:

8/641758

Inventors:

John H. Magee - Reading PA

Assignee:

CRS Holdings, Inc. - Wilmington DE

International Classification:

C22C 3858

US Classification:

420 42

Abstract:

An austenitic, stainless steel alloy is disclosed consisting essentially of, in weight percent, about ______________________________________ C 0. 035 max Mn 3-10 Si 1. 0 max P 0. 05 max S 0. 15-0. 45 Cr 10-20 Ni 4-8 Mo 1. 0 max Cu 1. 0-3. 0 N 0. 035 max B 0. 005 max Se 0. 1 max ______________________________________ with the balance essentially iron. The disclosed stainless steel provides superior machinability relative to AISI Type 203 stainless steel with similar corrosion resistance, strength, ductility, hardness, and magnetic permeability.

US Patent:

45540284, Nov 19, 1985

Filed:

Dec 13, 1983

Appl. No.:

6/560932

Inventors:

Terry A. DeBold - Wyomissing PA
John H. Magee - Reading PA
Norman B. Schmidt - Reading PA

Assignee:

Carpenter Technology Corporation - Reading PA

International Classification:

C22C 3858

US Classification:

148 38

Abstract:

A large, austenitic, non-magnetic, stainless steel, alloy article which has been significantly warm worked between about 1500. degree. F. and 1650. degree. F. but not subsequently annealed, which has a 0. 2% yield strength of at least about 90 ksi, and which, when formed into a U-bend, does not undergo stress corrosion cracking within about 700 hours in boiling saturated aqueous sodium chloride containing 2 weight percent (w/o) ammonium bisulfite. The alloy of the article consists essentially of about: ______________________________________ Elements w/o ______________________________________ C 0. 1 Max. Mn 1-11 Si 0. 6 Max. Cr 18-23 Ni 14-25 Mo 2. 5-6. 5 Cu 2 Max. B. 01 Max.

US Patent:

55122388, Apr 30, 1996

Filed:

Jun 7, 1995

Appl. No.:

8/473412

Inventors:

Theodore Kosa - Reading PA
John H. Magee - Reading PA

Assignee:

CRS Holdings, Inc. - Wilmington DE

International Classification:

C22C 3842

US Classification:

420 49

Abstract:

An austenitic, stainless steel alloy consists essentially of, in weight percent, about: ______________________________________ C 0. 030 max Mn 2. 0 max Si 1. 0 max P 0. 05 max S 0. 02-0. 05 Cr 16. 0-20. 0 Ni 9. 8-14. 0 Mo 3. 0 max Cu 0. 8-1. 5 N 0. 035 max ______________________________________ up to about 0. 75 weight percent of an element selected from the group consisting of Ti and Cb, and the balance is essentially iron, wherein Cb is not more than about 0. 1 weight percent when Ti. gtoreq. (5. times. % C. ) and Ti is not more than about 0. 1 weight percent when Cb. gtoreq. (10. times. % C. ). The alloy provides a unique combination of machinability, corrosion resistance, formability, and mechanical properties.

US Patent:

52541843, Oct 19, 1993

Filed:

Jun 5, 1992

Appl. No.:

7/893774

Inventors:

John H. Magee - Reading PA
Theodore Kosa - Reading PA
Donald K. Schlosser - Shillington PA

Assignee:

Carpenter Technology Corporation - Reading PA

International Classification:

C22C 3844

US Classification:

148325

Abstract:

A duplex stainless steel having a good combination of galling resistance and corrosion resistance is disclosed containing in weight percent about: ______________________________________ Broad Intermediate Preferred ______________________________________ C 0. 1 Max. 0. 05 Max. 0. 025 Max. Mn 0-6 1-4 1-3 Si 2. 5-6 3-6 4-5 Cr 16-24 17-22 18-21 Ni 2-12 6-10 7-9 Mo 4 Max. 0. 5-3 1. 0-2 N 0. 07-0. 30 0. 10-0. 25 0. 15-0. 20 ______________________________________ and the balance of the alloy is essentially iron. In the annealed condition the alloy is limited to about 15-50% v/o ferrite. To attain its good galling resistance, the alloying elements are balanced so that the % Ni+0. 68 (% Cr)+0.

US Patent:

48141402, Mar 21, 1989

Filed:

Jun 16, 1987

Appl. No.:

7/062899

Inventors:

John H. Magee - Reading PA

Assignee:

Carpenter Technology Corporation - Reading PA

International Classification:

C22C 3840

US Classification:

420 56

Abstract:

A galling and corrosion resistant austenitic stainless steel alloy is disclosed containing in weight percent about ______________________________________ w/o ______________________________________ Carbon 0. 25 Max. Manganese 2. 0-7. 0 Silicon 1. 0-5. 0 Phosphorus 0. 05 Max. Sulfur 0. 3 Max. Chromium 12-20 Nickel 2. 0-7. 75 Molybdenum 3 Max. Copper 3 Max. Nitrogen 0. 35 Max. ______________________________________ the balance being essentially iron. To attain its unique properties the alloy must be balanced so as to contain no more than about 10% ferrite. The % Ni+1/2(% Mn) must not be less than 5. 5% and not greater than 1/8[11(% Si)+42], and the sum of the (% C+% N) is at least 0. 15%.

US Patent:

50948121, Mar 10, 1992

Filed:

Apr 12, 1990

Appl. No.:

7/508222

Inventors:

Bradford A. Dulmaine - Muhlenberg Township PA
Theodore Kosa - Cumru Township PA
John H. Magee - Exeter Township PA
Donald K. Schlosser - Shillington PA

Assignee:

Carpenter Technology Corporation - Reading PA

International Classification:

C22C 3838

US Classification:

420 57

Abstract:

An austenitic, non-magnetic, stainless steel alloy and articles made therefrom are disclosed which, in the wrought condition, are essentially ferrite-free and have a relative magnetic permeability of less than about 1. 02, a room temperature 0. 2% yield strength of at least about 100 ksi, and good resistance to stress corrosion cracking in chloride environments. Broad, intermediate, and preferred ranges are disclosed as follows: ______________________________________ w/o Broad Intermediate Preferred ______________________________________ C 0. 08 max. 0. 05 max. 0. 035 max. Mn 14-19 15-18 16-18 Si 1 max. 1 max. 0. 75 max. Cr 12-21 14-19. 5 16-18 Ni 3. 5 2. 5 max. 1. 5 max.

US Patent:

54826748, Jan 9, 1996

Filed:

Jul 7, 1994

Appl. No.:

8/271199

Inventors:

Theodore Kosa - Reading PA
John H. Magee - Reading PA
James W. Martin - Sinking Spring PA
Ronald P. Ney - Reading PA

Assignee:

CRS Holdings, Inc. - Wilmington DE

International Classification:

C22C 3840
C22C 3860

US Classification:

420 42

Abstract:

An austenitic, stainless steel alloy having a unique combination of machinability and a low magnetic permeability, especially in the cold worked condition, is disclosed consisting essentially of, in weight percent, about ______________________________________ C 0. l035 max Mn 1. 0-4. 0 Si 1. 0 max P 0. 2 max S 0. 15-0. 45 Cr 16. 0-20. 0 Ni 9. 2-12. 0 Mo 1. 5 max Cu 0. 8-2. 0 N 0. 035 max Se 0. 1 max ______________________________________ with the balance essentially iron.