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| Number | Title | Issue Date |
| 8187530 | Steel for high-cleanliness spring with excellent fatigue characteristics and high-cleanliness spring An object of this invention is to provide a steel for high-cleanliness spring which is useful for the production of a spring excellent in fatigue characteristics in high Si steels. The steel for high-cleanliness spring with excellent fatigue characteristics accordin... | 05/29/2012 |
| 8187529 | Wear resistant alloy and method of producing thereof A wear resistant, high chromium white iron, in an unheat-treated condition has a microstructure substantially comprising austenite and M7C3 carbides. The white iron contains at least one martensite promoter and at least one austenite stabilizer... | 05/29/2012 |
| 8177925 | High-tensile steel plate, welded steel pipe or tube, and methods of manufacturing thereof In a high-tensile steel plate according to the invention, the carbon equivalent Pcm represented in Expression (1) is from 0.180% to 0.220%, the surface hardness is a Vicker's hardness of 285 or less, the ratio of a Martensite Austenite constituent in the surface lay... | 05/15/2012 |
| 8177929 | Method of making an embossed 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... | 05/15/2012 |
| 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 |
| 8168009 | Hard alloys with dry composition “HARD ALLOYS WITH DRY COMPOSITION”, presenting a composition of alloy elements consisting, in mass percentage, of Carbon between 0.5 and 2.0; Chrome between 1.0 and 10.0; Tungsten-equivalent, as given by ratio 2Mo+W, between 7.0 and 14.0; Niobium between 0.5 and... | 05/01/2012 |
| 8168011 | High-strength steel wire excellent in ductility and method of manufacturing the same The invention provides wire rod excellent in drawability and steel wire made from the wire rod as starting material with high productivity at good yield and low cost. A hard steel wire rod of a specified composition is heated in a specified temperature range to cond... | 05/01/2012 |
| 8168014 | Method for manufacturing martensitic stainless steel pipe or tube The method for manufacturing a martensitic stainless pipe includes heating the steel pipe until the external surface temperature thereof reaches a predetermined temperature not lower than A3 transformation point+20° C. and not higher than 980° C. The heated steel ... | 05/01/2012 |
| 8163233 | Martensitic stainless steel for welded structures A martensitic stainless steel for welded structures including by mass %, C: 0.001 to 0.05%, Si: 0.05 to 1%, Mn: 0.05 to 2%, P: 0.03% or less, REM: 0.0005 to 0.1%, Cr: 8 to 16%, Ni: 0.1 to 9% and sol. Al: 0.001 to 0.1%; and further including one or more elements sele... | 04/24/2012 |
| 8158057 | Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells Various embodiments relate to interconnects for solid oxide fuel cells (“SOFCs”) comprising ferritic stainless steel and having at least one via that when subjected to an oxidizing atmosphere at an elevated temperature develops a scale comprising a manganese-chr... | 04/17/2012 |
| 8157928 | Non-oriented electrical steel sheet and production process thereof A main object thereof is to provide a non-oriented electrical steel sheet being excellent in surface characteristics and having both excellent mechanical characteristics and magnetic characteristics necessary for a rotor of rotating machines such as motors and gener... | 04/17/2012 |
| 8153054 | High-temperature alloy An iron-based high-temperature alloy is disclosed which contains the following chemical composition: 20% by weight Cr; 5 to 6% by weight Al; 4% by weight Ta; 4% by weight Mo; 3 to 4% by weight Re; 0.2% by weight Zr; 0.05% by weight B; 0.1% by weight Y; 0.1% by weigh... | 04/10/2012 |
| 8153055 | Ferritic stainless steel with excellent heat resistance A ferritic stainless steel contains no expensive elements such as Mo and W, is free from the oxidation resistance loss caused by addition of Cu, and thereby has excellent levels of oxidation resistance (including water vapor oxidation resistance), thermal fatigue pr... | 04/10/2012 |
| 8147623 | Steel pipe as fuel injection pipe To provide a steel pipe as a fuel injection pipe with high material strength, high internal pressure limit free from fatigue failure, prolonged fatigue life, and high reliability. A steel pipe as a fuel injection pipe of 500 N/mm2 or higher tensile streng... | 04/03/2012 |
| 8147626 | Method for manufacturing high strength steel plate A high strength steel plate containing 0.02 to 0.08% C, by mass, and has substantially a two phase microstructure of ferrite and bainite. The ferrite contains precipitates having a particle size of 30 nm or smaller grain size. The steel plate has a yield strength of... | 04/03/2012 |
| 8147748 | Creep-resistant steel A creep-resistant steel is characterized by the following chemical composition (values in % by weight): 9.0 to 12.0 Cr, 0.1 to 0.5 Mn, 2.3 to 3 Ni, 1.5 to 2.0 Mo, 0.1 to 0.4 V, 0.01 to 0.06 Nb, 0.08 to 0.16 C, 0.02 to 0.08 N, 0.004 to 0.012 B, 0.001 to 2 Ta, 0.001 t... | 04/03/2012 |
| 8137613 | Austenitic stainless steel welded joint and austenitic stainless steel welding material An austenitic stainless steel welded joint, whose base metal and weld metal each comprises, by mass percent, C: not more than 0.3%, Si: not more than 2%, Mn: 0.01 to 3.0%, P: more than 0.04% to not more than 0.3%, S: not more than 0.03%, Cr: 12 to 30%, Ni: 6 to 55%,... | 03/20/2012 |
| 8137487 | Method of production of high strength thin-gauge steel sheet excellent in elongation and hole expandability The present invention provides high strength thin-gauge steel sheet with excellent elongation and hole expandability having a tensile strength of 500 MPa or more and a method of production of high strength thin-gauge steel sheet with excellent elongation and hole ex... | 03/20/2012 |
| 8137484 | Method of production of steel superior in machinability The present invention provides steel superior in machinability comprised of, by wt %, C: 0.005 to 0.2%, Si: 0.001 to 0.5%, Mn: 0.2 to 3.0%, P: 0.001 to 0.2%, S: 0.03 to 1.0%, T.N: 0.002 to 0.02%, T.O: 0.0005 to 0.035%, and the balance of Fe and unavoidable impuritie... | 03/20/2012 |
| 8137483 | Method of making a low cost, high strength, high toughness, martensitic steel A method of designing low cost, high strength, high toughness martensitic steel uses mathematical modeling to define optimum low cost chemical compositions, the content of retained austenite, and critical temperatures; melting an ingot, processing same, making steel... | 03/20/2012 |
| 8133333 | Processing method for the production of nanoscale/near nanoscale steel sheet The present disclosure relates to an iron alloy sheet comprising α-Fe, and/or γ-Fe phases wherein the alloy has a melting point in the range of 800 to 1500° C., a critical cooling rate of less than 105 K/s and structural units in the range of about 150... | 03/13/2012 |
| 8128762 | High-strength steel sheet superior in formability Disclosed is a high-strength steel sheet which has a predetermined component composition, structurally has a ferrite matrix structure and bainitic and martensitic second phase structures, and has a ferrite fraction of from 50 to 86 percent by area, a bainite fractio... | 03/06/2012 |
| 8128763 | Bake-hardenable cold rolled steel sheet with superior strength, galvannealed steel sheet using the cold rolled steel sheet and method for manufacturing the cold rolled steel sheet A cold-rolled steel sheet for outer panels and the like of an automobile body, a galvannealed steel sheet using the cold-rolled steel sheet, and a method for manufacturing the same are disclosed. It is an object of the present invention to provide a high strength co... | 03/06/2012 |
| 8118953 | Method for producing steel part having long rolling contact fatigue life A steel part having a long rolling contact fatigue life and capable of further increasing the life of a bearing under severer using condition than usual conditions. The steel part includes steel having a composition containing 0.7% by mass to 1.1% by mass of C, 0.5%... | 02/21/2012 |
| 8119063 | Austenitic iron and an iron product High-alloy austenitic stainless steels that are extra resistant to pitting and crevice corrosion in aggressive, chloride-containing solutions have a tendency for macro-segregation of Mo, at solidification of the melt. This problem is solved by a super austenite stai... | 02/21/2012 |
| 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 |
| 8101029 | Weld metal of high-strength Cr-Mo steel A weld metal of a high-strength Cr—Mo steel formed by shielded metal arc welding contains: 0.04 to 0.10% by mass C, 0.15 to 0.5% by mass Si, 0.5 to 1.0% by mass Mn, 2.00 to 3.25% by mass Cr, 0.9 to 1.2% by mass Mo, 0.01 to 0.03% by mass Nb, 0.2 to 0.7% by mass V, ... | 01/24/2012 |
| 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 |
| 8097094 | High-strength electrical steel sheet and processed part of same The present invention has as its object to stably produce a high strength electrical steel sheet and a processed part of the same which is high in strength and has wear resistant and is superior in magnetic flux density and core loss without greatly changing the col... | 01/17/2012 |
| 8097096 | Fire resistant steel excellent in high temperature strength, toughness, and reheating embrittlement resistance and process for production of the same The present invention provides a fire resistant steel material excellent in high temperature strength, toughness, and reheating embrittlement resistance containing, by mass %, C: 0.001% to 0.030%, Si: 0.05% to 0.50%, Mn: 0.4% to 2.0%, Nb: 0.03% to 0.50%, Ti: 0.005% ... | 01/17/2012 |
| 8097097 | Stainless steel having a high hardness and excellent mirror-finished surface property, and method of producing the same Disclosed is a stainless steel containing, by mass, 0.05% or less carbon, 1.5 to smaller than 3.5% Si, 3.0% or less Mn, 6.0 to 12.0% Cr, 4.0 to 10.0% Ni, 10.0% or less Co, 6.0% or less Cu, 0.5 to 3.0% Ti, 0 to 2.0% Al, less than 0.4% Mo, not more than 0.01% nitrogen... | 01/17/2012 |
| 8097099 | High toughness abrasion resistant steel with little change in hardness during use and method of production of same The present invention provides an abrasion resistant steel having a hardness of HB400 to HB520, having little change of hardness during long term use, and superior in toughness, characterized by containing, by mass %, C: 0.21% to 0.30%, Si: 0.30 to 1.00%, Mn: 0.32 t... | 01/17/2012 |
| 8097207 | Steel having high mechanical strength and wear resistance Method for reducing the segregated seams of a steel which has high mechanical strength and high wear resistance and whose composition comprises by weight: 0.30%≦C≦1.42%; 0.05%≦Si≦1.5%; Mn≦1.95%; Ni≦2.9%; 1.1%≦Cr≦7.9%; 0.61%≦Mo≦4.4%; optionally V... | 01/17/2012 |
| 8070889 | High-strength steel sheet and galvanized steel sheet having very good balance between hole expansibility and ductility, and also excellent in fatigue resistance, and methods of producing the steel sheets The invention is directed to providing, for application in automobiles, construction materials, household appliances and the like, high-strength sheets excellent in formability properties such as hole expansibility and ductility, and also in fatigue resistance, char... | 12/06/2011 |
| 8071020 | High strength Cr-Ni alloy material and seamless pipe for oil well A high strength Cr—Ni alloy material excellent in hot workability and stress corrosion cracking resistance, and seamless pipe for oil well application which consists of, by mass percent, C: 0.05% or less, Si: 0.05 to 1.0%, Mn: 0.01% or more and less than 3.0%, P: ... | 12/06/2011 |
| 8070890 | Induction hardened hollow driving shaft The present invention provides an induction-hardened hollow driving shaft that comprises, as a raw material, a steel pipe that contains, by mass %, 0.30 to 0.47% C, 0.5% or less Si, 0.3 to 2.0% Mn, 0.018% or less P, 0.015% or less S, 0.15 to 1.0% Cr, 0.001 to 0.05% ... | 12/06/2011 |
| 8066828 | Method for efficient heat treatment of steel A method for heat treatment of steel and a system thereof is provided. First the steel is austenitized at a suitable temperature and then the temperature is rapidly brought down to the austempering temperature. Here the cyclic austempering is carried out between two... | 11/29/2011 |
| 8057737 | Forging steel and its manufacturing method, and forged parts A forging steel has a dissolved Mg concentration within the range of 0.04-5 ppm by mass and a dissolved Al concentration within the range of 50-500 ppm. ... | 11/15/2011 |
| 8052807 | Steel sheet excellent in workability The present invention provides a steel sheet excellent in workability, which may be used for components of an automobile or the like, and a method for producing the same. More specifically, according to one exemplary embodiment of the present invention, a steel shee... | 11/08/2011 |
| 8052925 | Low carbon resulfurized free-machining steel having high machinability A low carbon resulfurized free-machining steel having a high machinability is provided. This steel comprises 0.02 to 0.15% by mass of C, up to 0.004% by mass (more than 0% by mass) of Si, 0.6 to 3% by mass of Mn, 0.02 to 0.2% by mass of P, 0.2 to 1% by mass of S, up... | 11/08/2011 |
