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| Number | Title | Issue Date |
| 8172959 | Austenitic stainless steel, manufacturing method for the same, and structure using the same There are provided an austenitic stainless steel having high stress corrosion crack resistance, characterized by containing, in percent by weight, 0.030% or less C, 0.1% or less Si, 2.0% or less Mn, 0.03% or less P, 0.002% or less S, 11 to 26% Ni, 17 to 30% Cr, 3% o... | 05/08/2012 |
| 8105447 | Austenitic stainless hot-rolled steel material with excellent corrosion resistance, proof stress, and low-temperature toughness An austenitic stainless steel hot-rolled steel material can be provided which has sea-water resistance and strength superior to conventional steel. Low-temperature toughness can be maintained, which is preferable in a structural member of speedy craft. The steel mat... | 01/31/2012 |
| 8097098 | Martensitic stainless steel composition, method for making a mechanical part from said steel and resulting part The invention concerns martensitic stainless steel, characterized in that its composition in weight percentages is as follows: 9%=Cr=13%; 1.5%=Mo=3%; 8%=Ni=14%; 1%=Al=2%; 0.5%=Ti=1.5% with AI+Ti=2.25%; traces=Co=2%; traces=W=1% with Mo+(W/2)=3%; traces=P=0.02%; trac... | 01/17/2012 |
| 7785427 | High strength alloys High strength metal alloys are described herein. At least one composition of a metal alloy includes chromium, nickel, copper, manganese, silicon, niobium, tungsten and iron. System, methods, and heaters that include the high strength metal alloys are described herei... | 08/31/2010 |
| RE41504 | Heat and corrosion resistant cast CF8C stainless steel with improved high temperature strength and ductility A CF8C type stainless steel alloy and articles formed therefrom containing about 18.0 weight percent to about 22.0 weight percent chromium and 11.0 weight percent to about 14.0 weight percent nickel; from about 0.05 weight percent to about 0.15 weight percent carbon... | 08/17/2010 |
| 7767039 | Martensitic stainless steel A martensitic stainless steel having a resistance to sulfide stress corrosion cracking superior to Super 13 Cr steel and having a strength and corrosion resistance comparable to dual phase stainless steels has a chemical composition consisting essentially of, in mas... | 08/03/2010 |
| 7708841 | Component for use in oil field technology made of a material which comprises a corrosion-resistant austenitic steel alloy An austenitic, substantially ferrite-free steel alloy and a process for producing components therefrom. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way. ... | 05/04/2010 |
| 7708842 | Metal gasket A metal gasket formed from a suitable iron-nickel chromium alloy includes at least one embossment that exhibits essentially full functional recovery at temperatures exceeding 1000° F. and including in the range of 1100° F. to 1600° F. or more and which is made fr... | 05/04/2010 |
| RE41100 | Heat and corrosion resistant cast CN-12 type stainless steel with improved high temperature strength and ductility A cast stainless steel alloy and articles formed therefrom containing about 0.5 wt. % to about 10 wt. % manganese, 0.02 wt. % to 0.50 wt. % N, and less than 0.15 wt. % sulfur provides high temperature strength both in the matrix and at the grain boundaries without r... | 02/09/2010 |
| 7442264 | Method of using low alloy anticoking steels with an increased silicon and manganese content in refining and petrochemicals applications The use is described, in the fabrication of apparatus and equipment used in refining and in petrochemicals (for example furnace, reactor or line elements), of a steel composition comprising: at most 0.25% C; more t... | 10/28/2008 |
| 7442265 | Heat-resistant cast steel excellent in aged ductility and creep rupture strength for hydrogen producing reaction tubes A heat-resistant cast steel excellent in high-temperature strength, aged ductility and creep rupture strength for use as a material for steam reforming reaction tubes in fuel cell hydrogen generation systems and the like. The cast steel has a chemical composition co... | 10/28/2008 |
| 7396421 | Duplex stainless steel and manufacturing method thereof A duplex stainless steel containing C, Si, Mn, P, S, Al, Ni, Cr, Mo, N (nitrogen, O (oxygen), Ca, Mg, Cu, B, and W, and the balance Fe and impurities, where a number of oxide-based inclusions, which have a total content of Ca and Mg of 20 to 40% by mass and also hav... | 07/08/2008 |
| 7377989 | Steel tube excellent in exfoliation resistance of scale on inner surface A steel tube excellent in exfoliation resistance of scale on its inner surface is provided. The steel tube includes 9 to 28% by mass of Cr and has a maximum height of profile (Rz) on the inner surface after cold working of 15 μm or more. Preferably ΔHv of the tube... | 05/27/2008 |
| 7361236 | Martensitic stainless steel A martensitic stainless steel having a C content of 0.01 to 0.1 mass %, a Cr content of 9 to 15 mass % and a N content of not more than 0.1 mass %, wherein the maximum length of the carbides in the steel is 10 to 200 nm in the direction of the minor axis, or wherein... | 04/22/2008 |
| 7354660 | High performance alloys with improved metal dusting corrosion resistance Alloy compositions which are resistant to metal dusting corrosion are provided by the present invention. Also provided are methods for preventing metal dusting on metal surfaces exposed to carbon supersaturated environments. The alloy compositions include an alloy (... | 04/08/2008 |
| 7347903 | Duplex stainless steel for urea manufacturing plants A duplex stainless steel for use in urea manufacturing plants, in mass %, consisting of C: 0.03% or less, Si: 0.5% or less, Mn: 2% or less, P: 0.04% or less, S: 0.003% or less, Cr: 26% or more, but less than 28%, Ni: 6-10%, Mo: 0.2-1.7%, W: more than 2%, but no more... | 03/25/2008 |
| 7326307 | Thermal fatigue resistant cast steel Disclosed is a heat resistant cast steel having not only good heat resistance but also good thermal fatigue resistance, which is suitable as the material for engine parts, particularly, such as exhaust gas manifold and turbo-housing, which are repeatedly exposed to ... | 02/05/2008 |
| 7258752 | Wrought stainless steel compositions having engineered microstructures for improved heat resistance A wrought stainless steel alloy composition includes 12% to 25% Cr, 8% to 25% Ni, 0.05% to 1% Nb, 0.05% to 10% Mn, 0.02% to 0.15% C, 0.02% to 0.5% N, with the balance iron, the composition having the capability of developing an engineered microstructure at a tempera... | 08/21/2007 |
| 7255755 | Heat and corrosion resistant cast CN-12 type stainless steel with improved high temperature strength and ductility A cast stainless steel alloy and articles formed therefrom containing about 0.5 wt. % to about 10 wt. % manganese, 0.02 wt. % to 0.50 wt. % N, and less than 0.15 wt. % sulfur provides high temperature strength both in the matrix and at the grain boundaries without r... | 08/14/2007 |
| 7252249 | Solenoid-type fuel injector assembly having stabilized ferritic stainless steel components A solenoid-type fuel injector assembly having at least one component formed of stabilized, solenoid-quality ferritic stainless steel. In a preferred embodiment, an austenitic fuel tube is laser-welded to an injector body and to a solenoid pole piece formed of the su... | 08/07/2007 |
| 7156979 | Thermal cracking process using tubes, pipes, and coils made of novel stainless steel matrix A thermal cracking process using tubes, pipes, and coils made of. An outermost surface covering not less than 55% of stainless steel, said surface having a thickness from 0.1 to 15 microns and being a spinel of the formula MnxCr3-xO... | 01/02/2007 |
| 7153373 | Heat and corrosion resistant cast CF8C stainless steel with improved high temperature strength and ductility A CF8C type stainless steel alloy and articles formed therefrom containing about 18.0 weight percent to about 22.0 weight percent chromium and 11.0 weight percent to about 14.0 weight percent nickel; from about 0.05 weight percent to about 0.15 weight percent carbon... | 12/26/2006 |
| 7101446 | Austenitic stainless steel An austenitic stainless steel with minimized deformation by heating and cooling treatment after cold working, which consists of, % by mass, C: 0.03% or less, Si: 2 to 4%, Mn: 0.1 to 2%, P: 0.03% or less, S: 0.03% or less, Ni: 9 to 15%, Cr: 15 to 20%, N: 0.02 to 0.2%... | 09/05/2006 |
| 7081173 | Super-austenitic stainless steel A super-austenitic stainless steel alloy with a composition, balanced in such a way that products made from the alloy fulfill high requirements on a combination of high corrosion resistance, especially in inorganic and organic acids and mixtures thereof, good genera... | 07/25/2006 |
| 7014812 | Sulfur-containing free-cutting steel for machine structural use A sulfur-containing free-cutting steel for machine structural use, containing, in weight percent, 0.10 to 0.55% of C, 0.05 to 1.00% of Si, 0.30 to 2.50% of Mn, not more than 0.15% of P, 0.050 to 0.350% of S, more than 0.010% but not more than 0.020% of Al, 0.015 to ... | 03/21/2006 |
| 7014720 | Austenitic stainless steel tube excellent in steam oxidation resistance and a manufacturing method thereof The present invention provides an austenitic stainless steel tube with a uniform fine grained structure of regular grains, which is not changed to a coarse structure and the steam oxidation resistance is maintained even if the tube is subjected to a high temperature... | 03/21/2006 |
| 7014719 | Austenitic stainless steel excellent in fine blankability An austenitic stainless steel comprising (C+½N) up to 0.060 mass %, Si up to 1.0 mass %, Mn up to 5 mass %, S up to 0.003 mass %, S/Mn ratio up to 0.003, 15–20 mass % Cr, 5–12 mass % Ni, Cu up to 5 mass %, 0–3.0 mass % Mo and the balance being Fe except inevi... | 03/21/2006 |
| 6939415 | Austenitic stainless steel and manufacturing method thereof An austenitic stainless steel excellect in high temperature strength and creep rupture ducitility which comprises, on the percent by mass basis, C: 0.03-0.12%, Si: 0.2-2%, Mn: 0.1-3%, P: 0.03% or less, S: 0.01% or less, Ni: more than 18% and less than 25%, Cr: more ... | 09/06/2005 |
| 6926778 | Austenitic stainless steel excellent in high temperature strength and corrosion resistance, heat resistant pressurized parts, and the manufacturing method thereof An austenitic stainless steel suited for ultra supercritical boilers, which consists of C: 0.03-0.12%, Si: 0.1-1%, Mn: 0.1-2%, Cr: not less than 20% but less than 28%, Ni: more than 35% but not more than 50%, W: 4-10%, Ti: 0.01-0.3%, Nb: 0.01-1%, sol. Al: 0.0005-0.0... | 08/09/2005 |
| 6918967 | Corrosion resistant austenitic alloy An austenitic alloy having improved ductility/processability and improved pitting and crevice corrosion resistance comprising, in % by weight, about: 25-30% Ni; 19-23% Cr; 6-8% Mo; 0.3-0.5% N; 0.5% Mn; 0-1.5% Cu; 0-0.2% C; 0-1% Al; 0-0.01% S; 0-1% Ti; 0-1% Si; up to... | 07/19/2005 |
| 6918968 | Austenitic stainless steel An austenitic stainless steel excellent in high temperature strength, high temperature ductility and hot workability, consisting of, by mass %, C: more than 0.05% to 0.15%, Si: 2% or less, Mn: 0.1 to 3%, P: 0.04% or less, S: 0.01% or less, Cr: more than 20% to less ... | 07/19/2005 |
| 6896747 | Austenitic alloy for heat strength with improved pouring and manufacturing, process for manufacturing billets and wire Austenitic alloy for high-temperature strength with improved pourability and manufacturing, of which the composition comprises, in weight-%: 0.010% | 05/24/2005 |
| 6811622 | Semifinished and finished products made of austenitic special steel and method for the production thereof The invention relates to semifinished and finished products made from special corrosion-resistant precipitation-hardened austenitic steel containing a large amount of intersticially dissolved nitrogen, comprising substantially smooth surfaces. The invention also rel... | 11/02/2004 |
| 6806635 | Fe-Ni-Cr- based alloy strip having improved press-formability and used for electrode of electron gun The Fe—Ni—Cr based alloy strip having improved press-formability is provided. The alloy strip essentially consists of from 15 to 20% of Cr, from 9 to 15% of Ni, the balance being Fe and unavoidable impurities, has 0.03% or less of cleanliness as stipulated under... | 10/19/2004 |
| 6780258 | Austenitic stainless steel less susceptible to cracking during forming and a manufacturing method thereof A new austenitic stainless steel containing approximately 0.1-1.0 mass % of Si and not more than approximately 0.003 mass % of Al. Nonmetallic inclusions dispersed in a steel matrix are converted to MnO—SiO2—Al2O3 containing not ... | 08/24/2004 |
| 6776728 | Weight member for a golf club head A weight member for a golf club head is made of a WFeNi alloy by a precision casting process. The WFeNi alloy includes wt 15%-40% of iron, wt 30%-60% of nickel, wt 15%-30% of tungsten, wt 1.5%-10.0% of chromium, and wt 0.5%-5.0% of molybdenum. Chromium improves the ... | 08/17/2004 |
| 6770113 | Method for forming anisotrophic metal particles A method for forming dendritic metal powders, comprising the steps of: (1) heating a powder comprising non-dendritic particles, under conditions suitable for initial stage sintering, to form a lightly sintered material; and (2) breaking the lightly sintered material... | 08/03/2004 |
| 6767416 | Corrosion resistant, high strength alloy and a method for manufacturing the same A corrosion resistant, high strength austenitic stainless steel consisting of 1.0% or less of Si, 2.0% or less of Mn, 0.5% or less of O, 7 to 30% of Ni, 14 to 26% of Cr, 0.3% or less of combination of C and N, at least one element selected from the group consisting ... | 07/27/2004 |
| 6764555 | High-strength austenitic stainless steel strip having excellent flatness and method of manufacturing same A high-strength austenitic stainless steel strip exhibiting excellent flatness with Vickers hardness of 400 or more has the composition comprising: C up to 0.20 mass %, Si up to 4.0 mass %, Mn up to 5.0 mass %, 4.0-12.0 mass % Ni, 12.0-20.0 mass % Cr, Mo up to 5.0 m... | 07/20/2004 |
| 6761777 | High chromium nitrogen bearing castable alloy The present invention is directed to a corrosion and erosion resistant High Chromium, Nitrogen bearing alloy, comprising the following composition in wt. %: 28-48 chromium, 0.01-0.7 nitrogen, 0.5-30 manganese, 0.01-5 boron, 0.3-2.5 carbon, up to 0.01-25 cobalt plus ... | 07/13/2004 |
