| Patent Number |
Title Of Patent |
Date Issued |
| PP9089 |
Manila grass variety GS90-18 |
March 21, 1995 |
| Manila grass (also South Japanese grass; Zoysia matrella L.) usually completely withers at the leaf part in winter in an area where frost occurs. The present variety of Manila grass is characterized by the ability to maintain green leaves (evergreen) in a whole year, a trait which ha |
| 7416617 |
High strength seamless steel pipe excellent in hydrogen-induced cracking resistance |
August 26, 2008 |
| A high strength seamless steel pipe having mgh yield stress and excellent hydrogen-induced cracking resistance, comprises by mass %, C: 0.03-0.11%, Si: 0.05-0.5%, Mn: 0.8-1.6%, p: 0.025% or less, S: 0.003% or less, Ti: 0.002-0.017%, Al: 0.001-0.10%, Cr: 0.05-0.5%, Mo: 0.02-0.3%, V: 0 |
| 7416616 |
Non-heat treated steel for soft-nitriding |
August 26, 2008 |
| Non-heat treated steel for soft-nitriding to form parts having high fatigue strength and excellent bend leveling property even in a case of applying soft-nitriding without thermal refining, comprising, by mass %, C: 0.30 to 0.45%, Si: 0.1 to 0.5%, Mn: 0.6 to 1.0%, Ti: 0.005-0.1% and N: |
| 7401486 |
Die, method of manufacturing stepped metal pipe or tube, and stepped metal pipe or tube |
July 22, 2008 |
| A die through hole has an inside surface including a bell portion, an approach portion, and a bearing portion from the entrance side. The diameter of the approach portion is D1 on its entrance side and D2 on its exit side and gradually decreases from the entrance side to the exit sid |
| 7399535 |
Hot press-formed article |
July 15, 2008 |
| A hot press-formed article having improved corrosion resistance and coating adhesion when coated is obtained by hot press forming of a zinc-based plated steel material. It has a zinc-based plating layer comprising an iron-zinc solid solution phase and atop it a zinc oxide layer. The |
| 7396597 |
Ni-Cr-Fe alloy and Ni-Cr-Fe alloy pipe having resistance to carburization and coking |
July 8, 2008 |
| A stainless steel pipe includes a base metal containing 20-35 mass % of Cr, and a Cr-depleted zone is formed in the surface region of the pipe. The Cr concentration in the Cr-depleted zone is at least 10%, and the thickness of the Cr-depleted zone is at most 20 micrometers. A Cr-based |
| 7396421 |
Duplex stainless steel and manufacturing method thereof |
July 8, 2008 |
| 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 have a long diameter |
| 7393597 |
Welded joint made of an austenitic steel |
July 1, 2008 |
| A weld joint having a base material and a weld metal both of an austenitic steel, wherein the weld metal has a chemical composition, in mass %, that C: 0.04% or less, Si: 1.0% or less, Mn: 3% or less, P: 0.02% or less, S: 0.005% or less, Cr: 15 to 25%, Ni: 30% or more, Mo: 10% or less, N |
| 7393420 |
Steel tube for bearing element parts and method of manufacturing as well as machining the same |
July 1, 2008 |
| Steel tubes for bearing element parts according to the present invention, wherein the specific compositions are limited and an accumulation intensity of {211} face along with an impact property at ambient temperature in the longitudinal direction of steel tube are specified, can be p |
| 7387691 |
Hot forged non-heat treated steel for induction hardening |
June 17, 2008 |
| A hot forged non-heat treated steel for induction hardening, comprising by mass percent, C: 0.35 to 0.45%, Si: 0.20 to 0.60%, Mn: 0.40 to 0.80%, S: 0.040 to 0.070%, Cr: 0.10 to 0.40%, Ti: 0.020 to 0.100%, Ca: 0.0005 to 0.0050%, B: 0.0005 to 0.0030%, O: 0.0015 to 0.0050%, Mo: 0 to 0.05%, |
| 7383710 |
Seamless tube piercing/rolling apparatus, and seamless tube producing therewith |
June 10, 2008 |
| A seamless tube producing method uses a piercing/rolling plug wherein piercing/rolling is performed with an inclined rotary piercing mill while the seamless tube piercing/rolling plug is used as a piercing tool. In one mode, a front part and a rear part of the split plug are held as an |
| 7377989 |
Steel tube excellent in exfoliation resistance of scale on inner surface |
May 27, 2008 |
| 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 .mu.m or more. Preferably .DELTA.Hv of the tube is 100 or |
| 7371293 |
Cold finished seamless steel tubes |
May 13, 2008 |
| Cold finished seamless steel tubes are made such that the residual stress F to be generated at the stage of the correction process after cold working is controlled to be 30 MPa or more and the scattering thereof is 30 MPa or less, when measured by Crampton method. Further, by adjusting |
| 7361236 |
Martensitic stainless steel |
April 22, 2008 |
| 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 the ratio of the aver |
| 7360798 |
Threaded joint for steel pipes |
April 22, 2008 |
| A threaded joint for steel pipes comprising a pin 1 and a box 2 each having a contact surface comprising a threaded portion 3 or 4 and an unthreaded metal contact portion 8 is provided with improved anti-galling propertied by forming a lubricating coating on the contact surface of at |
| 7347903 |
Duplex stainless steel for urea manufacturing plants |
March 25, 2008 |
| 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 than 3%, N: more than |
| 7347486 |
Metal tube for reinforcing car body and car body reinforcement therewith |
March 25, 2008 |
| A metal tube for reinforcing car body, and a car body reinforcement according to the invention have a curved portion extending over the entire longitudinal length or a local longitudinal length, wherein, when the reinforcement is assembled such that the outer periphery of the curved |
| 7334821 |
Premium threaded tubular joint comprising at least a threaded element with end lip |
February 26, 2008 |
| A premium threaded tubular connection including, on at least one threaded element, a distal abutment surface at the free end of a threaded element, and a lip sealing surface at a given distance from the threading. The lip includes an appendix that extends the lip towards its free end bey |
| 7333925 |
Manufacturing method and manufacturing apparatus of pipe, thickness deviation information deriva |
February 19, 2008 |
| A complex Fourier transform is performed on measured values of wall thickness at points in a cross section of a pipe in an axial direction, types of thickness deviation are classified, thickness deviation amount is calculated from the absolute value of the complex Fourier component, |
| 7331614 |
Tubular threaded joint with trapezoid threads having convex bulged thread surface |
February 19, 2008 |
| A threaded tubular connection includes two elements, male and female, made up one into the other to a given torque in which, prior to making up, at least one thread face under contact pressure has a convexly rounded shape that is continuous over its width with a radius of curvature in th |
| 7325429 |
Method for manufacturing seamless steel pipe or tube |
February 5, 2008 |
| A round billet containing, by mass %, 10.50 to 14.00% of Cr with a value represented by the equation of "Cr+4Si-(22C+0.5Mn+1.5Ni+30N)" of not more than 9.0%, wherein the symbols of the elements represent the contents, by mass %, of the elements in the steel, is heated at a soaking temper |
| 7320237 |
Method for measuring misalignment of continuance mill and apparatus for measuring the same |
January 22, 2008 |
| While a reference means having a positional relationship to the pass-line of a continuance mill determined in advance and caliber profile (area enclosed by the groove profile of a rolling roll) formed by a rolling roll at each stand are imaged within the same visual field and a position |
| 7316143 |
Seamless steel tubes and method for producing the same |
January 8, 2008 |
| A seamless steel tube comprising, in mass %, C: 0.30 to 0.50%, Si: 0.5% or less, Mn: 0.3 to 2.0%, P: 0.025% or less, S: 0.005% or less, Cr: 0.15 to 1.0%, Al: 0.001 to 0.05%, Ti: 0.005 to 0.05%, N: 0.02% or less, B: 0.0005 to 0.01% and O (oxygen): 0.0050% or less, wherein Beff defined in |
| 7315009 |
Material for welding and welded article |
January 1, 2008 |
| A material for welding 5 having a region 11 in which welding such as laser welding or arc welding is performed, the region including indentations 5a-1 which are produced by carrying out a first working step comprising embossing, V-bending, U-bending, L-bending, drawing, stepped drawing, |
| 7308812 |
Process for producing seamless steel pipe |
December 18, 2007 |
| A process for producing a seamless steel pipe, in which the occurrence of inner surface flaws in the pipe can be reduced through the lowering of the friction coefficient during the elongation rolling by means of a mandrel mill is provided. The reduction of inner surface flaws is acco |
| 7293443 |
Method for manufacturing seamless pipes or tubes |
November 13, 2007 |
| A method for manufacturing a seamless pipe, capable of preventing the carburization phenomenon that occurs in a manufacturing process of pipe and simplifying an elongation rolling process, is provided. In this method, after piercing in the piercing rolling process, rolling is perform |
| 7264684 |
Steel for steel pipes |
September 4, 2007 |
| A steel for steel pipes which comprises, on the percent by mass basis, C: 0.2 to 0.7%, Si: 0.01 to 0.8%, Mn: 0.1 to 1.5%, S: 0.005% or less, P: 0.03% or less, Al: 0.0005 to 0.1%, Ti: 0.005 to 0.05%, Ca: 0.0004 to 0.005%, N: 0.007% or less, Cr: 0.1 to 1.5%, Mo: 0.2 to 1.0%, Nb: 0 to 0 |
| 7260966 |
Tube shell for manufacturing a seamless steel pipe and a method for its manufacture |
August 28, 2007 |
| A pierced shell of an austenitic stainless steel having a good inner surface condition is provided, and a means is established which can perform mass production on an industrial scale of a good quality seamless steel pipe of stainless steel. An austenitic stainless steel billet with |
| 7252314 |
Crash energy absorption member |
August 7, 2007 |
| A crash energy absorption member formed from a tubular body for absorbing impact energy by buckling when it receives an impact load in the axial direction from one end in the axial direction. It has a transverse cross-sectional shape along at least a portion in the axial direction wh |
| 7247211 |
Method of manufacture of ultra-low carbon steel |
July 24, 2007 |
| A steel sheet with a thickness of at least 0.30 mm is made of an ultra-low carbon steel with a chemical composition including C: at most 0.010%, Si: at most 0.5%, Mn: at most 1.5%, P: at most 0.12%, S: at most 0.030%, Ti: at most 0.10%, Al: at most 0.08%, and N: at most 0.0080%. The tota |
| 7244471 |
Method for surface treatment of metal pipes |
July 17, 2007 |
| A method and apparatus for surface treating metal pipes includes introducing a treatment liquid into a first distribution chamber having a flat bottom surface, and dropping the treatment liquid onto at least a portion of the outer peripheral surface of the metal pipe through a plural |
| 7238434 |
Welded structure having improved resistance to stress corrosion cracking |
July 3, 2007 |
| This invention relates to a welded line pipe structure for transporting corrosive petroleum or natural gas. It is constituted by martensitic stainless steel pipes containing 8 16% Cr and at most 0.05% C. By suitably controlling the welding conditions at the time of girth welding of t |
| 7231792 |
Method and device for manufacturing UOE steel pipes |
June 19, 2007 |
| A method and device for manufacturing UOE steel pipes, wherein, when an opening width of the U-can obtained by U-ing press is larger than the die-diameter in an O-press of later step, while said opening is narrowed from the front end by the closing rolls disposed before said O-press |
| 7225868 |
Steel pipe for embedding-expanding, and method of embedding-expanding oil well steel pipe |
June 5, 2007 |
| (1) A steel pipe that is expanded radially in a state wherein it was inserted in a well such as an oil well, characterized in that the non-uniform wall thickness ratio E0 (%) before expanding satisfies the following expression {circle around (1)}. E0.ltoreq.30/(1+0.018.alpha.){circle |
| 7201812 |
Method for manufacturing seamless steel tube |
April 10, 2007 |
| A method for manufacturing a seamless steel tube, wherein a tubing material for the seamless steel tube is produced by a hot working process from a material having less workability, such as a high Cr--high Ni--high C alloy steel including Cr at a content not less than 15 weight % and Ni |
| 7197906 |
Cold rolling process for metal tubes |
April 3, 2007 |
| In the cold rolling process by pilger rolling that holds a mandrel between each of paired roll-dies, by optimizing the side relief rate SR and the pass schedule factors such as the Area Rd, ID Rd and the feed rate F of the workpiece material, and further by properly selecting the taper |
| 7188501 |
Cold rolling process for metal tubes |
March 13, 2007 |
| In the cold rolling process by pilger rolling that holds a mandrel between each of paired roll-dies, by optimizing the side relief rate SR and the mandrel factors like the taper .theta.1 in the primary deformation zone of the mandrel and the taper .theta.2 in the final size reduction zon |
| 7174761 |
Method of manufacturing a seamless pipe |
February 13, 2007 |
| When manufacturing a seamless pipe by carrying out elongation rolling and sizing on a mother tube for forming a seamless pipe, the occurrence of portions of thickness variation in the seamless pipe is suppressed by previously identifying the portions of wall thickness variation where the |
| 7170073 |
Stainless steel product containing B and method for production thereof |
January 30, 2007 |
| A stainless steel slab containing B, wherein a protecting material is joined onto at least two faces across the bloom from each other in a stainless steel bloom containing B of 0.3 2.5 mass %, being integrated into one-piece by forming a weld metal comprising a stainless steel with c |
| 7165431 |
Cr-plated mandrel bar for manufacturing hot seamless tube and method of manufacturing the same |
January 23, 2007 |
| By employing a Cr-plated mandrel bar for producing hot seamless tubes according to the present invention wherein centerline average roughness Ra in axial and circumferential directions as well as maximum depth Rv in axial and circumferential directions is specified and further maximum |
| 7160825 |
Machinable ceramic |
January 9, 2007 |
| A high-strength machinable ceramic capable of high-precision fine machining has a coefficient of thermal expansion close to that of silicon and preferably a uniform blackish color which facilitates image processing of machined parts. The ceramic comprises a main constituent and a sin |
| 7150391 |
Material for welding and welded article |
December 19, 2006 |
| A material for welding 5 having a region 11 in which welding such as laser welding or arc welding is performed, the region including indentations 5a-1 which are produced by carrying out a first working step comprising embossing, V-bending, U-bending, L-bending, drawing, stepped drawing, |
| 7146836 |
Piercing method for manufacturing of seamless pipe |
December 12, 2006 |
| A piercing method for manufacturing a seamless pipe capable of suppressing the rotary forging effects and suppressing the redundant shear strain without excessive narrowing of the roll diameter is provided. This method is characterized by holding a feed angle .beta. and a cross angle .ga |
| 7132021 |
Process for making a work piece from a .beta.-type titanium alloy material |
November 7, 2006 |
| A process for making a work piece from a .beta.-type titanium alloy material includes subjecting the .beta.-type titanium alloy material to cold working with controlling the reduction rate thereof to vary the reduction rate depending on a position across a plain direction of the .bet |
| 7128791 |
Heat-resistant martensite alloy excellent in high-temperature creep rupture strength and ductili |
October 31, 2006 |
| The present invention provides a martensitic heat resistant alloy having a composition (A) comprising, % by weight: 0.03 to 0.15% of C; 0.01 to 0.9% of Si: 0.01 to 1.5% of Mn; 8.0 to 13.0% of Cr; 0.0005 to 0.015% of Al; no more than 2.0% of Mo; no more than 4.0% of W; 0.05 to 0.5% of V; |
| 7112549 |
Low thermal expansion ceramic and member for exposure system |
September 26, 2006 |
| A low-thermal-expansion, rigid and wear-resistant ceramic is provided. The low-thermal-expansion ceramic of the invention includes 60 vol % to 99.9 vol % of at least one selected from the group consisting of cordierite, spodumene and eucryptite and 0.1 vol % to 40 vol % of at least one |
| 7101446 |
Austenitic stainless steel |
September 5, 2006 |
| 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%, Nb: 0.03% or less, |
| 7100410 |
Method of manufacturing seamless tube |
September 5, 2006 |
| A method of manufacturing a seamless tube by the invention can duly control the rotary forging effect without miss-rolling such as defective onset engagement with rolls by satisfying either of (1) (3) formulas below, dependent on a given range of roll diameter ratio Dg/D1, prevent th |
| 7093469 |
Manufacturing method and manufacturing apparatus of pipe, thickness deviation information deriva |
August 22, 2006 |
| A complex Fourier transform is performed on measured values of wall thickness at points in a cross section of a pipe in an axial direction, types of thickness deviation are classified, thickness deviation amount is calculated from the absolute value of the complex Fourier component, |
| 7086450 |
Continuous casting method, continuous casting apparatus and continuously cast steel slab |
August 8, 2006 |
| A continuous casting method is demonstrated, in which a slab including a liquid core 11 is bulged and then reduced in its thickness with a reduction roll pair 7, in which case, the uppermost surface of the lower roll 7b in the reduction roll pair 7 is located at a higher level than t |
