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| Number | Title | Issue Date |
| 8052808 | High strength hot rolled steel sheet with excellent press workability and method of manufacturing the same Disclosed is a hot rolled steel sheet which contains C, Si, Mn, Al, Ti, N, and S. The C, Ti, N, and sulfur contents satisfy the following condition (1), and the Si and Mn contents satisfy the following condition (2): [C]−{[Ti]−(48/14)×[N]−(48/32)×[... | 11/08/2011 |
| 7794552 | Method of producing austenitic iron/carbon/manganese steel sheets having very high strength and elongation characteristics and excellent homogeneity A hot-rolled austenitic iron/carbon/manganese steel sheet, the strength of which is greater than 1200 MPa, the product P (strength (in MPa)×elongation at break (in %)) of which is greater than 65 000 MPa % and the nominal chemical composition of which comprises, th... | 09/14/2010 |
| 7780799 | Cold-rolled steel sheet having a tensile strength of 780 MPA or more, an excellent local formability and a suppressed increase in weld hardness The present invention provides a high-strength cold-rolled steel sheet and a high-strength surface treated steel sheet 780 MPa or more in tensile strength, said steel sheets having excellent local formability and suppressed weld hardness increase and being character... | 08/24/2010 |
| 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 |
| 6948649 | Method of producing steel pipes, and welded pipes The high yield ratio problem intrinsic in high-strength steel pipes is solved and a method of producing a steel pipe, while securing the pipe roundness is provided. A steel pipe produced from a steel plate by forming and welding is subjected to 0.3 to 1.2% of expans... | 09/27/2005 |
| 6623571 | Metastable aluminum-titanium materials This invention relates to the synthesis of a new generation of metastable aluminum-titanium (Al--Ti) alloys and the process of making them. The preparation method used is a combination process incorporating the advantages of conventional casting and spray... | 09/23/2003 |
| 6617050 | Low density and high ductility alloy steel for a golf club head An alloy for golf club head include by weight 25 to 31 wt % manganese, 6.3 to 7.8 wt % aluminum, 0.65 to 0.85 wt % carbon and 5.5 to 9.0 wt % chromium, and the balance being iron. Additions of 0.8 to 1.5 wt % silicon, 2.0 to 5.0 wt % titanium, or 0.5 to 1... | 09/09/2003 |
| 6586117 | Steel sheet having excellent workability and shape accuracy and a method for its manufacture A steel for forming a high strength steel sheet contains, in mass %, C: at most 0.04%, Si: at most 0.4%, Mn: 0.5-3.0%, P: at most 0.15%, S: at most 0.03%, Al: at most 0.50%, N: at most 0.01%, and Mo: 0.01-1.0%. Steel sheet formed from the steel is suitabl... | 07/01/2003 |
| 6559573 | Spindle motor and pivot assembly A shaft 2 of a spindle motor is composed of a steel material including 0.20 wt % of C, 0.35 wt % of Si, 8.00 wt % of Mn, higher than 0 and equal to or less than 0.05 wt % of P, 0.15 wt % of S, higher than 0 and equal to or less than 2.00 wt % of Ni and 14... | 05/06/2003 |
| 6524726 | Cold-rolled steel sheet and galvanized steel sheet, which are excellent in formability, panel shapeability, and dent-resistance, and method of manufacturing the same Disclosed is a cold-rolled steel sheet excellent in formability, panel shapeability and dent-resistance, comprising 0.005 to 0.015% by weight of C, 0.01 to 0.2% by weight of Si, 0.2 to 1.5% by weight of Mn, 0.01 to 0.07% by weight of P, 0.006 to 0.015% by... | 02/25/2003 |
| 6506266 | Tire or solid wheel for wheelsets of rail vehicles A composition for steel used for tires or solid wheels of rail vehicles, which composition provides improved properties, in terms of wear, crack susceptibility, ability to withstand thermal loads, homogenous microstructural properties and suitability for ... | 01/14/2003 |
| 6423426 | High tensile hot-dip zinc-coated steel plate excellent in ductility and method for production thereof A steel sheet having a composition comprising C: 0.05-0.20 mass %, Si: 0.3-1.8 mass %, Mn: 1.0-3.0 mass %, Fe of the balance and inevitable impurities is subjected to a primary step of primary heat treatment and subsequent rapid cooling to Ms point or low... | 07/23/2002 |
| 6410163 | High strength thin steel sheet, high strength alloyed hot-dip zinc-coated steel sheet, and method for producing them The present invention provides a high strength thin excellent workability and galvanizability, having a composition comprising from 0.01 to 0.20 wt. % C, up to 1.0 wt. % Si, from 1.0 to 3.0 wt. % Mn, up to 0.10 wt. % P, up to 0.05 wt. % S, up to 0.10 wt. ... | 06/25/2002 |
| 6361740 | Suspension arm and load beam for a disk drive A high-damping, corrosion resistant and substantially non-magnetic material having high damping properties has been developed for use in dynamic applications, specifically, a disk drive suspension arm and load beam. A disk drive assembly includes a disk h... | 03/26/2002 |
| 6112669 | Projectiles made from tungsten and iron A lead-free projectile made from a composition containing about 5-25% by weight tungsten and more than about 97% by weight tungsten plus iron.... | 09/05/2000 |
| 5743972 | Heavy-wall structural steel and method A heavy-wall steel having a flange thickness of about 40 mm or more and possessing excellent strength, toughness, weldability, and seismic resistance capable of being used for structure members such as columns and beams of high-rise buildings. The heavy-w... | 04/28/1998 |
| 5735974 | Irradiated intermetallic compound containing part of light-water reactor A part of a light-water reactor, for example, a cladding for a light-water reactor has at least a portion made of an intermetallic compound, such as Ni3 Al, Ni2 Al3, TiAl, Ti3 Al, Pt2 Si, PtSi, FeAl | 04/07/1998 |
| 5728238 | Iron based powder, component produced therefrom and method of producing the component An iron-based powder for producing impact-resistant components by powder compacting and sintering contains, in addition to Fe, 0.3-0.7% by weight of P, 0.3-3.5% by weight of Mo, and not more than 2% by weight of other alloying elements. A method of powder... | 03/17/1998 |
| 5538044 | Welded steel pipe steel and welded steel pipe having good wear Welded steel pipe having wear resistance properties, corrosion resistance and low-temperature toughness is provided by preparing welded steel pipe formed of composite steel material comprised of an outer layer of high-carbon, low-alloy steel and an inner ... | 07/23/1996 |
| 5385617 | Ultralow yield strength steel An ultralow yield strength steel consisting of: from 0.01 to 0.25 wt % of hexagonal boron nitride particles having an average diameter of from 1 to 30 μm; and the balance consisting of iron and unavoidable impurities.... | 01/31/1995 |
| 5069981 | Steel sheet dip-plated with a Zn-Al alloy and process for the manufacture thereof A low carbon steel sheet dip-plated with a Zn-Al alloy, which is in a non-recrystallized and rolled state and which comprises, as an element to raise the recrystallization temperature, at least one of Ti: 0.01~0.40% by weight, Nb: 0.01~0.10% by weight, an... | 12/03/1991 |
| 4816090 | Heat treated cold rolled steel strapping A method of heat treating cold rolled steel strapping comprising rapidly heating the strapping to the dual phase temperature range at a rate of the order of 100° C. per second, with little or more soaking, and rapidly cooling the strapping at a rate of t... | 03/28/1989 |
| 4812182 | Air-cooling low-carbon bainitic steel Steel articles have a granular bainite microstructure on continuous air cooling, from hot working temperature, of a low cost, tough, high strength, low alloy (HSLA) steel having a composition which, in broadest scope, scope, consists essentially, by weigh... | 03/14/1989 |
| 4662953 | Creep resistant cold-rolled and annealed steel sheet and strip A cold-rolled, annealed and coated steel sheet or strip characterized by (1) a high degree of creep resistance, as measured by excellent performance in a sag deflection test when subjected to temperatures up to 1500° F. for times in excess of 100 hours, ... | 05/05/1987 |
| 4657606 | High chromium duplex stainless steel A high chromium, copper containing, duplex steel alloy having a microstructure in which 40% to 60% is a ferritic matrix, the matrix having austenite grains embedded therein, the structure being substantially free of precipitated particles of other phases,... | 04/14/1987 |
| 4613385 | High strength, low carbon, dual phase steel rods and wires and process for making same A high strength, high ductility, low carbon, dual phase steel wire, bar or rod and process for making the same is provided. The steel wire, bar or rod is produced by cold drawing to the desired diameter in a single multipass operation a low carbon steel c... | 09/23/1986 |
| 4585062 | Method of using rods resistant to hydrosulfuric acid High-strength rods, useful in an acid enviroment, in which the H2 S partial pressure in gaseous phase may exceed 300 Pa or in which the H2 S content in liquid phase may have a corresponding equilibrium pressure and/or in which CO | 04/29/1986 |
| 4581079 | Bearing steel A bearing steel containing about 0.8% to about 1.2% carbon, about 0.5% to about 1.33% manganese, about 0.25% to about 0.7% silicon, about 0.14% to about 0.5% molybdenum, up to about 0.75% chromium and the balance essentially iron has improved hardenabilit... | 04/08/1986 |
| 4533405 | Tubular high strength low alloy steel for oil and gas wells An article of manufacture is provided comprising a heat treated high strength low-alloy steel tubular product of the L-80 and N-80 type suitable for use as an oil well tubular member. The composition consists essentially of about 0.1 to 0.4% C, about 0.07... | 08/06/1985 |
| 4529441 | Electrical steels The invention provides a continuous cast electrical steel and its method of production from a steel melt having a composition range of up to 0.06% carbon, up to 0.04% sulphur, up to 0.15% phosphorus, up to 1.0% manganese, and not more than 0.001% silicon,... | 07/16/1985 |
| 4501626 | High strength steel plate and method for manufacturing same There are described a high strength steel plate having a low yield ratio and improved strength-elongation balance and stretch flangeability, and a method for producing same, the steel plate containing 0.01-0.2% of C, 0.3-2.5% of Mn and 0.01-1.8% of Si and... | 02/26/1985 |
| 4496400 | Thin steel sheet having improved baking hardenability and adapted for drawing and a method of producing the same The present invention belongs to a technical field of cold rolled steel sheet. The present invention provides a thin steel sheet suitable to be formed into, for example, an external automotive plate by a method including an appearance-finishing step by ba... | 01/29/1985 |
| 4478652 | Class D sucker rods It has been found that API Class D sucker rods can be made inexpensively from low-alloy, low-cost steel by following a suitable induction-normalizing process and using a suitable steel to which there has been added 0.07 to 0.15 percent of vanadium.... | 10/23/1984 |
| 4473414 | High tensile strength cold rolled steel sheets and high tensile strength hot-dip galvanized steel sheets The present invention provides high tensile strength cold rolled steel sheets having excellent formability, which consist of 0.002-0.015% of C, not more than 1.2% of Si, 0.04-0.8% of Mn, 0.03-10% of P, 0.02-0.10% and not less than N%×4 of Al, C%×3-{C%×... | 09/25/1984 |
| 4472208 | Hot-rolled high tensile titanium steel plates and production thereof A hot-rolled high tensile titanium steel plate and production thereof are disclosed. The steel plate has improved toughness and cold formability and is made of a killed steel which consists essentially of: the balance being Fe and incidental impurities, the Ti... | 09/18/1984 |
| 4466842 | Ferritic steel having ultra-fine grains and a method for producing the same A novel hot-rolled ferritic steel composed of 70% or more of equiaxed ferrite grains having an ultra-fine grain size of 4 μm or less. This steel is produced by a hot working at approximately the Ar3 point and by one or more passes of the hot w... | 08/21/1984 |
| 4437891 | Oil-atomized low-alloy steel powder An oil-atomized low-alloy steel powder having improved compressibility, compactibility and hardenability is disclosed. The steel powder has the chemical composition: C: no greater than 0.02%, Mn: 0.3-2.0%, oxygen: no greater than 0.10%, one or more of Cr:... | 03/20/1984 |
| 4432812 | Drive train gear of lower bainite alloy steel A drive train gear having a plurality of teeth thereon is formed of an alloy steel having a predominantly homogeneous and substantially complete low temperature bainite microstructure, including less than 10 Vol % austenite. The gear preferably consists e... | 02/21/1984 |
| 4426236 | Method for manufacturing high strength rail of excellent weldability A method for manufacturing high strength rail having excellent weldability comprises subjecting a steel rail of specific composition to specific heat treatment conditions at the surface layer portion of the head thereof, to impart high strength to the rai... | 01/17/1984 |
| 4426235 | Cold-rolled high strength steel plate with composite steel structure of high r-value and method for producing same A cold-rolled high strength steel plate with excellent formability and baking hardenability, has the composition (% by weight) 0.2-0.15% of C, 0.02-0.7% of Mn, 0.01-0.1% of Al and 0.002-0.01% of N, optionally at least one element selected from the group c... | 01/17/1984 |
