Crs Holdings, Inc.

Carpenter Technology Corporation

John H Magee, Jr

Theodore Kosa

Donald K Schlosser

James W Martin

Terry A DeBold

Bradford A Dulmaine

Ronald P Ney, Sr

Norman B Schmidt

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.

Corrosion-resistant, cold-formable, machinable, high strength, martensitic stainless steel

Free-machining austenitic stainless steel

An austenitic, stainless steel alloy is disclosed consisting essentially of, in weight percent, about

An austenitic, stainless steel alloy consists essentially of, in weight percent, about:

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

An austenitic, stainless steel alloy having a good combination of galling resistance and corrosion resistance is disclosed containing in weight percent about:

Corrosion resistant austenitic stainless steel with improved galling

Austenitic, non-magnetic, stainless steel alloy and articles made

A duplex stainless steel having a good combination of galling resistance and corrosion resistance is disclosed containing in weight percent about:

Corrosion resistant duplex stainless steel with improved galling

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:

Austenitic, non-magnetic, stainless steel alloy

A large, austenitic, non-magnetic, stainless steel, alloy article which has been significantly warm worked between about 1500 F. and 1650 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:

A galling and corrosion resistant austenitic stainless steel alloy is disclosed containing in weight percent about

Galling resistant austenitic stainless steel alloy

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:

Growing community of inventors

Reading, PA, United States of America

John H Magee, Jr