Carpenter Technology Corporation

Crs Holdings, Inc.

Donald K Schlosser

Theodore Kosa

John H Magee, Jr

Bradford A Dulmaine

Donald R Muzyka

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

Precipitation hardenable or hardened nickel-cobalt-iron base alloy containing nickel, cobalt, iron, columbium, titanium, aluminum and boron as the only essential elements, characterized by a mean coefficient of linear expansion of about 3.times.10.sup.-.sup.6 /.degree. F to 6.times.10.sup.-.sup.6 /.degree. F from room temperature to its Curie temperature of at least about 600.degree. F to 1000.degree. F or higher. The alloy contains about 35-45% nickel, 13-18% cobalt, 2.5-7.0% columbium, 1.0-4.0% titanium, 0.1-2% aluminum, and a small but essential amount of boron.

Growing community of inventors

Shillington, PA, United States of America

Donald K Schlosser