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| Number | Title | Issue Date |
| 8168008 | Martensitic stainless steel pipe A martensitic stainless steel pipe having a heat-affected zone with high resistance to intergranular stress corrosion cracking is provided. In particular, the martensitic stainless steel pipe contains less than 0.0100% of C; less than 0.0100% of N; 10% to 14% of Cr;... | 05/01/2012 |
| 8157930 | Martensitic stainless steel A martensitic stainless steel comprising C: 0.01-0.10%, Si: 0.05-1.0%, Mn: 0.05-1.5%, P: not more than 0.03%, S: not more than 0.01%, Cr: 9-15%, Ni: 0.1-4.5%, Al: not more than 0.05% and N: not more than 0.1% in mass %, and further comprising at least one of Cu: 0.0... | 04/17/2012 |
| 8152937 | Ferritic stainless steel sheet having superior sulfuric acid corrosion resistance and method for manufacturing the same Disclosed is a ferritic stainless steel sheet which has excellent corrosion resistance against sulfuric acid in the high-temperature environment and shows less surface roughness at a bent part which is bent at 90° or more. Specifically disclosed is a ferritic stain... | 04/10/2012 |
| 8034197 | Ultra-high strength stainless steels An ultra-high strength stainless steel alloy with enhanced toughness includes in % by weight: 0 to 0.06% carbon (C); 12.0 to 18% chromium (Cr); 16.5 to 31.0% cobalt (Co); 0 to 8% molybdenum (Mo); 0.5 to 5.0% nickel (Ni); 0 to 0.5% titanium (Ti); 0 to 1.0% niobium (N... | 10/11/2011 |
| 8034198 | Austenitic stainless steel tube for boiler with excellent resistance to high temperature steam oxidation The present invention relates to an austenitic stainless steel tube for boiler, used for superheater or reheater in thermal power plant, giving excellent resistance to high temperature steam oxidation, in particular to an austenitic stainless steel tube containing 1... | 10/11/2011 |
| 8007602 | Spring element made from a ferritic chromium steel Spring element, in particular spring rail for wipers, in particular of motor vehicles, with a low tendency to vibrate or a high attenuation, made from a ferritic chromium steel comprising 0.03 to 0.12% of carbon, 0.2 to 0.9% of silicon, 0.3 to 1% of manganese, 13 to... | 08/30/2011 |
| 7892366 | Duplex stainless steel alloy and use thereof The present invention relates to a stainless steel alloy, more specifically a duplex stainless steel alloy with a ferritic-austenitic matrix and high corrosion resistance in combination with good structure stability, specifically a duplex stainless steel with a ferr... | 02/22/2011 |
| 7879159 | Martensitic stainless steel strengthened by NiTi η-phase precipitation A precipitation-hardened stainless maraging steel which exhibits a combination of strength, toughness, and corrosion resistance comprises by weight about: 8 to 15% chromium (Cr), 2 to 15% cobalt (Co), 7 to 14% nickel (Ni), and up to about 0.7% aluminum (Al), less th... | 02/01/2011 |
| 7862666 | Highly anticorrosive high strength stainless steel pipe for linepipe and method for manufacturing same A highly corrosion resistant high strength stainless steel pipe for linepipe, having a composition containing about 0.001 to about 0.015% C, about 0.01 to about 0.5% Si, about 0.1 to about 1.8% Mn, about 0.03% or less P, about 0.005% or less S, about 15 to about 18%... | 01/04/2011 |
| 7842141 | Stainless-steel pipe for oil well and process for producing the same A steel composition contains: 0.05% or less of C; 0.5% or less of Si; 0.20% to 1.80% of Mn; 0.03% or less of P; 0.005% or less of S; 14.0% to 18.0% of Cr; 5.0% to 8.0% of Ni; 1.5% to 3.5% of Mo; 0.5% to 3.5% of Cu; 0.05% or less of Al; 0.20% or less of V; 0.01% to 0... | 11/30/2010 |
| 7819991 | Ferritic stainless steel sheet for raw material pipe for bellows pipe A ferritic stainless steel sheet for forming a raw material pipe for bellows pipe is excellent in formability and high-temperature properties (high-temperature salt corrosion resistance and high-temperature fatigue properties). Specifically, the ferritic stainless s... | 10/26/2010 |
| 7806993 | Heat-resistant ferritic stainless steel and method for production thereof The present invention provides a ferritic stainless steel that has excellent strength at high temperature, oxidation resistance at high temperature, and salt corrosion resistance at high temperature and that can be used under high temperatures exceeding 900° C., an... | 10/05/2010 |
| 7785426 | Welded joint of tempered martensite based heat-resistant steel A welded joint of a tempered martensitic heat resisting steel includes a fine-grained heat affected zone of weldment of a heat resisting steel having a tempered martensite structure which exhibits a creep strength of 90% or more of the creep strength of the base met... | 08/31/2010 |
| 7767037 | High strength stainless steel pipe for use in oil well having superior corrosion resistance and manufacturing method thereof A stainless steel pipe for use in oil wells which has a high strength having a YS of 654 MPa or more and superior corrosion resistance even in a severe corrosive environment in which CO2 and are present and the temperature is high, such as up to 230° C. ... | 08/03/2010 |
| 7758707 | Martensitic stainless steel and method of the manufacture The invention relates to a martensitic stainless steel to be used for making a razor, surgical and similar blades or other cutting tools, which steel contains 0.40 to 0.55 wt % carbon, 0.8 to 1.5 wt % silicon, 0.7 to 0.85 wt % manganese, 13.0 to 14.0 wt % chromium, ... | 07/20/2010 |
| 7686898 | Creep-resistant maraging heat-treatment steel A maraging heat-treatment steel includes 8.5 to 9.5% by weight of Cr, 0.15 to 0.25% by weight of Mn, 2 to 2.7% by weight of Ni, 0.5 to 2.5% by weight of Mo, 0.4 to 0.8% by weight of V, 0.001 to 0.15% by weight of Si, 0.06 to 0.1% by weight of C, 0.11 to 0.15% by wei... | 03/30/2010 |
| 7686897 | Martensitic stainless steel seamless pipe and a manufacturing method thereof The present invention provides a martensitic stainless steel seamless pipe and a method of making, wherein the pipe has minimal inner surface defects and prevents delayed fracture generation in the impact-worked portions. The pipe comprises C: 0.15 to 0.22%, Si: 0.1... | 03/30/2010 |
| 7662244 | Martensitic stainless steel and method for manufacturing same A martensitic stainless steel provided includes C: 0.01-0.1% and Cr: 9-15%, and the retained austenite phase has a thickness not more than 100 nm in such a manner that the X-ray integral intensities of 111γ and 110α satisfy the following formula (a): 0.0... | 02/16/2010 |
| RE40950 | Ferritic stainless steel plate The present invention provides a ferritic stainless steel sheet having excellent formability and excellent surface quality after forming. In specific means, the steel sheet contains, by mass %, 0.02 to 0.06% of C, 1.0% or less of Si, 1.0% or less of Mn, 0.05% or les... | 11/10/2009 |
| 7601230 | Medical devices Alloy compositions suitable for fabricating medical devices, such as stents, are disclosed. In certain embodiments, the compositions have small amounts of nickel, e.g., the compositions can be substantially free of nickel. ... | 10/13/2009 |
| 7531052 | Steel strip for razor blades and method of manufacturing the same The present invention provides a martensitic stainless steel strip for razor blades in annealed state comprising a continuous processed groove being formed with thermal energy in a longitudinal direction on one side of the strip at a position with a predetermined di... | 05/12/2009 |
| 7485197 | Method for manufacturing martensitic stainless steel tube In a martensitic stainless steel tube according to the present invention, the content is determined by each of elements C, Si, Mn and Cr, and the bubble content ratio is further prescribed in accordance with the scale thickness on the outer surface of the steel tube... | 02/03/2009 |
| 7476282 | Martensitic stainless steel pipe A martensitic stainless steel pipe, which comprises specified quantities of C, Si, Mn, P, S, Cr, Ni, Al, N, Cu, Ti, V, Mo, Nb, B and Ca, and the balance being Fe and impurities, has satisfactory toughness at a high strength of 650 MPa or more by yield strength and a... | 01/13/2009 |
| 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 |
| 7429302 | Stainless steel sheet for welded structural components and method for making the same A structural hot-rolled or cold-rolled stainless steel sheet having improved intergranular corrosion resistance and toughness at the welding heat affected zone and further having low strength and high elongation. The composition of the steel sheet contains less than... | 09/30/2008 |
| 7404865 | Steel wire for heat-resistant spring, heat-resistant spring and method for producing heat-resistant spring A high-strength steel wire for heat-resistant springs has both excellent high-temperature tensile strength and excellent high-temperature sag resistance at a temperature as high as 350 to 500° C., particularly at 400° C. or so (these properties are needed for spri... | 07/29/2008 |
| 7396422 | Rolling bearing, material for rolling bearing, and equipment having rotating part using the rolling bearing The invention relates to a rolling bearing which provides superior noiselessness and high corrosion resistance and longer life, and is manufactured at a low cost, a material for the rolling bearing, and an instrument including a rotating portion using the rolling be... | 07/08/2008 |
| 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 |
| 7361235 | Method for producing dispersed oxide reinforced ferritic steel having coarse grain structure and being excellent in high temperature creep strength A method of manufacturing an oxide dispersion strengthened ferritic steel excellent in high-temperature creep strength having a coarse grain structure. The method comprises mixing alloy powders and an Y2O3 powder, subjecting the mixed powder to... | 04/22/2008 |
| 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 |
| 7361411 | Hardfacing alloy, methods, and products Disclosed is a hardfacing alloy capable of withstanding service abrasion of the order of silicious earth particles and weldable on industrial products, such as tool joints and stabilizers used in oil and gas well drilling, and other industrial products. The hardfaci... | 04/22/2008 |
| 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 |
| 7341637 | Ferritic stainless steel sheet excellent in press formability and workability and method for production thereof A ferritic stainless steel sheet excellent in press formability and operability, characterized by: containing appropriate amounts of C, N, Cr, Si, Mn, P, S, Al, Ti and V, with the balance consisting of Fe and unavoidable impurities; having a solid lubricating film o... | 03/11/2008 |
| 7341690 | Soft Cr-containing steel The soft Cr-containing steel includes, on a % by mass basis, C: from about 0.001% to about 0.020%, Si: more than about 0.10% and less than about 0.50%, Mn: less than about 2.00%, P: less than about 0.060%, S: less than about 0.008%, Cr: from about 12.0% to about 16.... | 03/11/2008 |
| 7331102 | Apparatus for detecting an amount of strain and method for manufacturing same An apparatus for detecting an amount of strain comprises a strain generating part, an electrical insulating layer and sensing elements. The strain generating part is a member to which strain is to be applied. The electrical insulating layer is formed on the strain g... | 02/19/2008 |
| 7325432 | Method for manufacturing fuel cell metallic separator A metallic separator according to a first embodiment is formed by obtaining a blank by rolling a metallic material having conductive inclusions, and removing a surface of the blank by 2% or more of the thickness of the blank. A metallic separator according to a seco... | 02/05/2008 |
| 7322361 | Method for supplying a flowable medium to the tobacco of a smoking product The invention relates to a method for supplying a flowable medium to the tobacco rod of a smoking product, wherein the medium is introduced on a drum (1) of a cigarette machine, after the tobacco rod is formed. ... | 01/29/2008 |
| 7294214 | Medical devices Alloy compositions suitable for fabricating medical devices, such as stents, are disclosed. In certain embodiments, the compositions have small amounts of nickel, e.g., the compositions can be substantially free of nickel. ... | 11/13/2007 |
| 7294212 | High-strength stainless steel material in the form of a wheel rim and method for manufacturing the same Material for stainless steel sheets is heated to a temperature within a range of 850 to 1250° C. and cooled at a rate 1° C./s or faster, the material including 0.02% by mass or less of C, 1.0% by mass or less of Si, 2.0% by mass or less of Mn, 0.04% by mass or les... | 11/13/2007 |
