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| Number | Title | Issue Date |
| 6893727 | Metal gasket and a material for its manufacture and a method for their manufacture This invention relates to a stainless steel gasket having markedly improved strength and fatigue properties due to precipitation strengthening. Its composition comprises C: at most 0.03%, Si: at most 1.0%, Mn: at most 2%, Cr: 16.0%-18.0%, Ni: 6.0%-8.0%, N: at most 0... | 05/17/2005 |
| 6475310 | Oxidation resistant alloys, method for producing oxidation resistant alloys A method for producing oxidation-resistant austenitic alloys for use at temperatures below 800° C. comprising of: providing an alloy comprising, by weight %: 14-18% chromium, 15-18% nickel, 1-3% manganese, 1-2% molybdenum, 2-4% silicon, 0% aluminum and t... | 11/05/2002 |
| 6406570 | Elastic component for a precision instrument and process for its manufacture An elastic component for a precision measuring instrument is made from an austenitic metal alloy containing less than two percent ferrite, less than two percent martensite, and more than eleven percent chromium. The crystalline texture has a nano-structur... | 06/18/2002 |
| 6338762 | Stainless steel for use in engine gaskets and a method for manufacturing thereof An austenitic stainless steel for use in engine gaskets having a high fatigue strength and resistance to settlement and method of manufacture thereof. The austenitic stainless steel is prepared by cold rolling at least 40%, annealing at a temperature of 7... | 01/15/2002 |
| 6149744 | Method of making austenitic stainless steel sheet Method of making a hot-rolled steel sheet having superior surface appearance, free of surface patterns and uneven glossiness from an austenitic stainless steel slab containing about 0.03 percent by weight or more of Cu, about 0.03 percent by weight or mor... | 11/21/2000 |
| 6132525 | Manufacturing of materials and workpieces for components in nuclear plant applications Austenitic steel intended for use in radiation areas of nuclear reactors is largely resistant to irradiation-induced stress corrosion cracking if its silicon, phosphorus and sulfur contents are reduced in relation to standard commercial steel quantities a... | 10/17/2000 |
| 6129795 | Metallurgical method for processing nickel- and iron-based superalloys A method is provided for improving the microstructure of nickel and iron-based precipitation strengthened superalloys used in high temperature applications by increasing the frequency of "special", low-Σ CSL grain boundaries to levels in excess of 50%. P... | 10/10/2000 |
| 6060180 | Alloy having high corrosion resistance in environment of high corrosiveness, steel pipe of the same alloy and method of manufacturing the same steel pipe The present invention provides a highly corrosion-resistant alloy used as a boiler tube in equipment the energy source of which is obtained by burning fossil fuel or waste, a steel tube for which the alloy is used, and a process for producing the steel tu... | 05/09/2000 |
| 5980662 | Method for batch annealing of austenitic stainless steels Methods are provided for annealing coils of austenitic stainless steels through the use of a batch annealing process. The preferred methods involved selecting compositions of austenitic stainless steel alloys having a sufficiently low weight percentage of... | 11/09/1999 |
| 5976275 | High-nickel austenitic stainless steel resistant to degradation by neutron irradiation The present invention aims at providing structural materials having a resistance to degradation by neutron irradiation, causing no SCC in an environment of light-water reactors even after subjecting the materials to neutron irradiation of approximately at... | 11/02/1999 |
| 5858135 | Method for cold rolling and annealing strip cast stainless steel strip A method for producing strip cast, austenitic stainless steel strip comprises providing a strip cast strip having an initial microstructure including a detrimental amount of delta ferrite and a detrimental amount of dendritic structure is provided. The st... | 01/12/1999 |
| 5824264 | High-temperature stainless steel and method for its production A high-temperature austenitic stainless steel having improved weldability is disclosed. The steel consists essentially, by weight, of: C: 0.05%-0.15%, Si: less than 1.0%, Mn: 2.0% or less, P: 0.04% or less, S: 0.01% or less, Cr: 20%-30%, Ni: 10%-15%, N: 0.10%-0.30%... | 10/20/1998 |
| 5817193 | Metal alloys having improved resistance to intergranular stress corrosion cracking In the fabrication of components from a face centered cubic alloy, wherein the alloy is cold worked and annealed, the cold working is carried out in a number of separate steps, each step being followed by an annealing step. The resultant product has a gra... | 10/06/1998 |
| 5284535 | Method of manufacturing an austenitic stainless steel sheet and a manufacturing system for carrying out the same A method of manufacturing an austenitic stainless steel sheet having reduced minute surface concavities and convexties ropings and gloss unevenness and a manufacturing system for carrying out the same are provided. The method comprises (a) a casting proce... | 02/08/1994 |
| 5269856 | Process for producing high strength endless steel belt having a duplex structure of austenite and martesite A high strength steel belt having an excellent flatness and a duplex structure of austenite and martensite has been prepared by a process which comprises providing a cold rolled or cold rolled and annealed strip of a martensitic structure from low carbon ... | 12/14/1993 |
| 5252149 | Ferrochromium alloy and method thereof An erosion and corrosion resistant ferrochromium alloy comprising the following composition, in wt. %, 34-50 chromium, 1.5-2.5 carbon, up to 5 manganese, up to 5 silicon, up to 5 molybdenum, up to 10 nickel, up to 5 copper, up to 1% of each of one or more... | 10/12/1993 |
| 5180450 | High performance high strength low alloy wrought steel A high strength, low alloy, low to medium carbon structural steel is provided of the Fe/Cr/C type, said steel characterized by the presence of a small but effective amount of each of Cu and Ni sufficient to enhance the mechanical stability of retained aus... | 01/19/1993 |
| 5171384 | Process for producing high strength stainless steel strip excellent in shape A high strength steel strip excellent in shape having a duplex structure of austenite and martensite has been prepared by a process which comprises providing a cold rolled or cold rolled and annealed strip of a martensitic structure from low carbon marten... | 12/15/1992 |
| 4846899 | Nitride dispersion-strengthened steels and method of making A low carbon steel has a composition which is ferritic, martensitic or ferritic: martensitic at temperatures of the order of 700° C. and substantially fully austenitic at temperatures in excess of 1000° C. and nitriding of a refractory stable metal nitr... | 07/11/1989 |
| 4699671 | Treatment for overcoming irradiation induced stress corrosion cracking in austenitic alloys such as stainless steel Stress corrosion cracking of austenitic stainless steel or nickel-based alloys attributable at least in part to exposure to irradiation is reduced with a specific heat treatment.... | 10/13/1987 |
| 4671827 | Method of forming high-strength, tough, corrosion-resistant steel A high-strength, tough alloy steel is formed by heating an alloy steel comprising iron, 0.1-0.4 weight % carbon, 1-3 weight % manganese and 1-13 weight % chromium and optionally containing microalloying amounts of other metals to about 1150° C. to form a... | 06/09/1987 |
| 4514236 | Method of manufacturing an article of non-magnetic austenitic alloy steel for a drill collar A non-magnetic austenitic alloy steel capable of producing the magnetic properties required in items such as Drill Collars in the as-rolled or as-rolled and direct quenched condition. The steel composition includes by weight up to 0.5% carbon from 10 to 25% ... | 04/30/1985 |
| 4272305 | Ferritic-austentitic chromium-nickel steel and method of making a steel body Steel bodies composed of ferritic-austenitic Cr-Ni steel with 30 to 70% austenite and consisting essentially of: up to 0.1% by weight carbon, up to 1.0% by weight silicon, 4.0% to 6.0% by weight manganese, 22.0% to 28.0% by weight chromium, 3.5% to 5.5% by weight n... | 06/09/1981 |
| 4263063 | Process for stabilizing dimensions of duplex stainless steels for service at elevated temperatures Duplex stainless steel materials containing austenite plus delta ferrite, are dimensionally stabilized by heating the material to a reaction temperature between about 1050°-1450° F. (566°-788° C.), holding it at this temperature during transforma... | 04/21/1981 |
| 4086107 | Heat treatment process of high-carbon chromium-nickel heat-resistant stainless steels The present invention relates to a heat treatment process of high-carbon chromium-nickel heat-resistant stainless steels for the purpose of improving the creep rupture strength of the steel at temperatures over about 800° C particularly at about 1000° C... | 04/25/1978 |
