Free-machining austenitic stainless steel
AssigneeCRS Holdings, Inc.
InventorsTheodore Kosa, John H. Magee, Jr.
Life of this patent
Estimating the term…
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.
Claims23
An austenitic, stainless steel alloy consisting 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 0.76-1.5 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 being 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.).
An austenitic, stainless steel alloy consisting essentially of, in weight percent, about:
- ______________________________________ C 0.030 max Mn 2.0 max Si 1.0 max P 0.05 max S 0.020-0.030 Cr 18.0-19.0 Ni 10.0-11.0 Mo 1.0 max Cu 0.76-1.0 N 0.030 max ______________________________________
- and the balance being essentially iron.
An austenitic, stainless steel alloy consisting essentially of, in weight percent, about:
- ______________________________________ C 0.030 max Mn 2.0 max Si 1.0 max P 0.05 max S 0.020-0.030 Cr 16.0-17.5 Ni 10.5-12.5 Mo 2.0-3.0 Cu 0.76-1.0 N 0.030 max ______________________________________
- and the balance being essentially iron.
An austenitic, stainless steel alloy consisting essentially of, in weight percent, about:
- ______________________________________ C 0.030 max Mn 2.0 max Si 1.0 max P 0.05 max S 0.020-0.030 Cr 17.0-18.0 Ni 10.0-11.0 Mo 1.0 max Cu 0.76-1.0 N 0.030 max Ti (5 .times. % C) to 0.5 ______________________________________
- and the balance being essentially iron.
An austenitic, stainless steel alloy consisting essentially of, in weight percent, about:
- ______________________________________ C 0.030 max Mn 2.0 max Si 1.0 max P 0.05 max S 0.020-0.030 Cr 17.0-18.0 Ni 10.0-11.0 Mo 1.0 max Cu 0.76-1.0 N 0.030 max Cb (10 .times. % C) to 0.5 ______________________________________
- and the balance being essentially iron.
Dependencies are inferred from the claim text.