Abstract: A corrosion resistant, martensitic steel alloy having very good cold formability is described. The alloy has the following weight percent composition. Carbon 0.10-0.40 Manganese 0.01-2.0? Silicon ?2.0 max. Phosphorus ?0.2 max. Sulfur 0.030 max.? Chromium 10-15 Nickel ?0.5 max. Molybdenum 0.75-4.0? Nitrogen 0.02-0.15 Copper 1.5-4.0 Titanium 0.01 max. Aluminum 0.01 max. Niobium + Tantalum 0.10 max. Vanadium 0.20 max. Zirconium less than 0.001 Calcium less than 0.001 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.

Abstract: A corrosion resistant, martensitic steel alloy having very good cold formability is described. The alloy has the following weight percent composition. Carbon 0.10-0.40 Manganese 0.01-2.0? Silicon ?2.0 max. Phosphorus ?0.2 max. Sulfur 0.030 max.? Chromium 10-15 Nickel ?0.5 max. Molybdenum 0.75-4.0? Nitrogen 0.02-0.15 Copper 1.5-4.0 Titanium 0.01 max. Aluminum 0.01 max. Niobium + Tantalum 0.10 max. Vanadium 0.20 max. Zirconium less than 0.001 Calcium less than 0.001 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.

Abstract: The present invention relates to an austenitic stainless steel alloy and in particular to a resulfurized austenitic stainless steel alloy, and an article made therefrom, having a unique combination of corrosion resistance, machinability and low magnetic permeability, especially in the cold worked condition.

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.

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.

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.

Abstract: An austenitic, non-magnetic, stainless steel alloy is disclosed which, in the wrought condition, is essentially ferrite-free and has 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 1.0 max. 1.0 max. 0.75 max. Cr 12-21 14-19.5 16-18 Ni 3.5 2.5 max. 1.5 max. Mo 0.5-4 0.75-2.5 1.0-2.0 Cu 2.0 max. 1.5 max. 1.0 max. N 0.2-0.8 0.3-0.7 0.4-0.6 B 0.06 max. 0.005 max. 0.005 max. ______________________________________the balance being iron.

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)+0.55 (% Mn)+0.45 (% Si)+(% C+% N)+% Mo+0.2 (% Co), is at least about 27.5, and the Ni/Si ratio is not more than about 2.5.

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. Mo 0.5-4 0.75-2.5 1.0-2.0 Cu 2.0 max. 1.5 max. 1.0 max. N 0.2-0.8 0.3-0.7 0.4-0.6 B 0.06 max. 0.005 max. 0.005 max. ______________________________________the balance being iron. The alloy is balanced to be essentially ferrite-free and is further balanced according to Equations 1 and 2 (Eqs.

Abstract: 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:______________________________________ 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. N 0.15 Min. C + N .gtoreq. ##STR1## ______________________________________and the balance is essentially iron. A preferred alloy for this article contains about: ______________________________________ Elements w/o ______________________________________ C .02 Max. Mn 3.0-9.0 Si 0.5 Max. Cr 18-23 Ni 15-22 Mo 2.5-6.5 N 0.20 Min. 3 Mo + Cr .gtoreq. 29.

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%. Care must be taken that when the amount of silicon present is less than about 2.25%, at least about 4.0% manganese is present.

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. N 0.15 Min. C + N .gtoreq. ##STR1## ______________________________________and the balance is essentially iron. a preferred alloy for this article contains about: ______________________________________ Elements w/o ______________________________________ C .02 Max. Mn 3.0-9.0 Si 0.5 Max. Cr 18-23 Ni 15-22 Mo 2.5-6.5 N 0.20 Min. 3Mo + Cr .gtoreq.