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| Number | Title | Issue Date |
| 7494618 | Alloy tool steel To provide an alloy tool steel having high-temperature strength at an operating temperature of the order of 700° C., while maintaining room-temperature strength as high as that of a conventional matrix high-speed tool steel. The steel contains from 0.45 wt % to 0.6... | 02/24/2009 |
| 7357060 | Vehicle armor A vehicle is armored the steps of sequentially making a steel plate with a thickness of 4 mm to 15 mm of by weight | 04/15/2008 |
| 7074282 | Steel wire rod for hard drawn spring, drawn wire rod for hard drawn spring and hard drawn spring, and method for producing hard drawn spring Disclosed is a steel wire rod for hard-drawn springs capable of exhibiting fatigue strength and sag resistance equivalent to or higher than springs made of an oil-tempered wire. The steel wire rod contains carbon in a range from 0.5 to less than 0.7 mass %, silicon ... | 07/11/2006 |
| 7018209 | Apparatus and methods for a shape memory spring actuator and display Various apparatus and methods for an actuator and display using one or more shape memory springs. A shape memory spring is heated and urges a pin to a first or extended position. The pin may be supported in the first position by a supporting mechanism. The shape mem... | 03/28/2006 |
| 6953508 | High strength steel weld having improved resistance to cold cracking and a welding method A welding method includes performing welding to form a weld metal consisting essentially of, in mass %, | 10/11/2005 |
| 6949149 | High strength, high carbon steel wire To achieve a drawn wire with a tensile strength defined by the equation of Y=Yo exp(A2εd) wherein Y is the tensile strength in MPa (N/mm2), Yo is the strength of as patented wire, A2 is a coefficient... | 09/27/2005 |
| 6869692 | Bimetal saw band Bimetal saw band comprising a support band of high microstructural stability and fatigue strength, comprising 0.25 to 0.35% of carbon, 0.3 to 0.5% of silicon, 0.8 to 1.5% of manganese, 1.0 to 2.0% of molybdenum, 1.5 to 3.5% of chromium, 0.5 to 1.5% of nickel, 0.5 to... | 03/22/2005 |
| 6866816 | Wear and corrosion resistant austenitic iron base alloy A unique austenitic iron base alloy for wear and corrosion resistant applications, characterized by its excellent sulfuric acid corrosion resistance and good sliding wear resistance, is useful for valve seat insert applications when corrosion resistance is required.... | 03/15/2005 |
| 6805757 | Casting material for indefinite rollers with sleeve part and method for producing the same A method of the production and processing of alloyed casting material for a working part of an indefinite chill roll, a corresponding casting material and a composite indefinite chill roll incorporating the casting material. The method comprises providing a melt of ... | 10/19/2004 |
| 6797231 | Steel for machine structural use The invention provides a steel for machine structural use, which is excellent in machinability, comprising, in percent by mass, C: 0.1-0.6%. Si: 0.01-2.0%, Mn: 0.2-2.0%, S: 0.005-0.2%, Al: not more than 0.009%, Ti: not less than 0.001% but less than 0.04%, Ca: 0.000... | 09/28/2004 |
| 6755920 | Low-alloy heat-resistant steel, heat treatment method therefor, and turbine rotor comprising the same A low-alloy heat-resistant steel may be used to manufacturing a large element which has uniform superior high temperature properties through a surface layer to a center part. The low-alloy heat-resistant steel comprises carbon in an amount of 0.20 to 0.35% by weight... | 06/29/2004 |
| 6702981 | Low-carbon, low-chromium carburizing high speed steels High speed steel (HSS) compositions having less C and Cr contents than standard grades of HSS to permit carburization using conventional techniques. The alloys contain less than 0.40 wt. % C and less than 2% Cr. The low Cr content is a critical factor in ... | 03/09/2004 |
| 6494970 | Heat resistant steel casting and method of manufacturing the same Disclosed is a heat resistant steel casting, comprising C, 0.15-0.3%, Si, 0.1-0.30%, Mn, 0.01-0.1%, Cr, 2.0-2.5%, Mo, 0.3-0.8%, V, 0.23-0.3%, W, 1.6-2.6%, N, 0.005-0.03%, B, 0.001-0.004%, impurity elements including Ni not larger than 0.2%, P not larger t... | 12/17/2002 |
| 6419878 | Fe-Cr alloy having excellent initial rust resistance, workability and weldability Fe--Cr alloy having excellent weldability and initial rust resistance with no requirement of greatly increasing the amount of elements such as Ni, Cu, Cr or Mo, addition of Nb or Ti and, further, excess reduction of C and N, in which the Fe--Cr alloy cont... | 07/16/2002 |
| 6413329 | High strength steel for dies with excellent machinability A high strength steel for dies has excellent machinability and including, by weight, 0.005 to 0.1% C, not more than 1.5% Si, not more than 2.0% Mn, from 3.0 to less than 8.0% Cr, not more than 4.0% Ni, 0.1 to 2.0% Al, not more than 3.5% Cu, and balance of... | 07/02/2002 |
| 6386583 | Low-carbon high-strength steel A low carbon high strength steel consists essentially of, by weight, about 0.07% to about 0.12% carbon, about 0.70% to about 1.60% manganese, up to about 0.020% phosphorous, up to about 0.015% sulfur, about 0.06% to about 0.35% silicon, about 0.25% to abo... | 05/14/2002 |
| 6379611 | High strength, low alloy, heat resistant steel A high strength, low alloy, heat resistant steel having excellent weldability has an average crystal grain diameter of at most 110 μm and consists essentially of, by mass %: C: 0.03-0.15%, Si: at most 1%, Mn: at most 2%, P: at most 0.03%, S: at most 0.03... | 04/30/2002 |
| 6368549 | Metallurgical vessel Disclosed is a metallurgical vessel, in particular a converter for treating liquid molten metals, in particular steel, formed of a refractory lining and a supporting metal shell that surrounds the refractory lining. The vessel is composed of welded togeth... | 04/09/2002 |
| 6322747 | High-strength spring steel A high-strength spring steel having an Hv of at least 600 and an impact value of at least 40 J/cm2, comprising 0.40 to 0.70 wt. % carbon, 1.00 to 2.50 wt. % silicon, 0.30 to 0.90 wt. % manganese, 0.50 to 1.50 wt. % nickel, 1.00 to 2.00 wt. % ch... | 11/27/2001 |
| 6315946 | Ultra low carbon bainitic weathering steel An ultra-low carbon weathering steel has a carbon content of from about 0.015 wt % to about 0.035 wt %; a copper content of from about 0.20 wt % to about 0.40 wt %; a chromium content of from about 0.40 wt % to about 0.70 wt %; a nickel content of from ab... | 11/13/2001 |
| 6280685 | Tool steel composition The invention relates to a tool steel composition comprising, expressed in weight percentage: C 0.3%-0.4% Cr 2.0%-4.0% Mo 0.8%-3.0% V 0.4%-1.0% W 1.5%-3.0% Co 1.0%-5.0% Si 0 %-1.0% Mn 0 %-1.0% Ni 0 %-1.0% the balance being mainly constituted by iron and inevitable ... | 08/28/2001 |
| 6254697 | Cast steel material for pressure vessels and method of making a pressure vessel by using same The present invention provides a cast steel material for pressure vessels which has improved impact resistance (weldability) and toughness while maintaining its creep rupture strength at a level equal to or higher than the excellent creep rupture strength... | 07/03/2001 |
| 6248187 | Corrosion resisting steel and corrosion resisting oil well pipe having high corrosion resistance to carbon dioxide gas An object of the present invention is to provide a corrosion resistant steel excellent in strength and low temperature toughness as well as resistance to corrosion by carbon dioxide and seawater, and most suitable for oil well steel pipes and line pipes f... | 06/19/2001 |
| 6245290 | High-tensile-strength steel and method of manufacturing the same A high-tensile-strength steel having excellent toughness throughout its thickness, excellent properties at welded joints, and a tensile strength (TS) of at least about 900 MPa (130 ksi), and a method for making such steel, are provided. Steels according t... | 06/12/2001 |
| 6238493 | Method of making a weathering grade plate and product thereform A method of making a weathering grade steel plate includes the steps of casting, hot rolling, and accelerated cooling using a modified weathering grade alloy composition. The composition employs effective levels of manganese, carbon, niobium, molybdenum, ... | 05/29/2001 |
| 6224825 | Case hardening steel A case hardening steel with a minimum of grain boundary oxidation, suitable for use in the manufacture of mechanical elements with high demands on fatigue resistance and wear resistance, comprising, in % by weight: C 0.12... | 05/01/2001 |
| 6146583 | Alloy steel composition and chain products fabricated in such alloy steel A steel alloy for fabricating into chain links particularly for a mining chain having a composition including nickel in the range of 0.3 to 1.5%, particularly 1%, chromium in the range of 0.2 to 1.0%, particularly 0.5%, molybdenum in the range of 0.1 to 1... | 11/14/2000 |
| 6126897 | Carburizing steel and steel products manufactured making use of the carburizing steel A carburizing steel having the following chemical composition: C: 0.1 to 0.25%, Si: 0.2 to 0.4%, Mn: 0.3 to 0.9%, P: 0.02% or less, S: 0.001 to 0.15%, Cr: 0.5 to 0.9%, Mo: 0.15 to 1%, Al: 0.01 to 0.1%, B: 0.0005 to 0.009%, N: less than 0.006%, and the balance of Fe and ... | 10/03/2000 |
| 6123504 | Steam-turbine power plant and steam turbine A steam turbine includes a rotor shaft, movable blades assembled on the rotor shaft, fixed blades for guiding inflow of steam to the moving blades, and an inner casing for holding the fixed blades. The rotor shaft and at least a first stage of the movable... | 09/26/2000 |
| 6042782 | Welding material for stainless steels A welding material for use in a consumable or non-consumable electrode welding of stainless steels, capable of forming a weld metal with excellent corrosion resistance and mechanical properties, being drawn into a welding wire easily. The welding material... | 03/28/2000 |
| 6019938 | High ductility very clean non-micro banded die casting steel A die casting die and a Cr--Mo--V steel therefore having an ultimate strength of 190,000 psi, a yield strength of 160,000, a tempering response of 400 BHN at a tempering temperature of 1150° F. and final gas contents of N--70 ppm, O--30 ppm and H--about ... | 02/01/2000 |
| 5948354 | Ferrules for continuous castings of metal or metal alloy, in particular aluminum Cylinder ferrule for continuous casting of metal or metal alloy, in particular aluminum, characterized in that it is made of a steel the composition of which, in percentage by weight, is the following: Carbon: 0.25 to 0.35% Manganese: 0.30 to 0.60% Silicon: 0.... | 09/07/1999 |
| 5945064 | Welding material for low chromium (Cr) ferritic steel having high toughness This invention provides a welding material for low chromium (Cr) ferritic heat-resisting steel having high toughness, wherein the chemical composition of welding metal comprises, in weight %, carbon (c) 0.04-0.1%, silicon (Si) 0.1-0.6%, manganese (Mn) 0.1... | 08/31/1999 |
| 5939019 | Steel for foundry roll shells The invention relates to a steel for foundry roll shells comprising (in % by weight) 0.1 to 0.4% carbon 0.1 to 0.8% silicon 0.2 to 0.7% manganese 2.0 to 2.9% chromium 0.2 to 0.9% nickel 0.5 to 1.2% molybdenum 0.3 to 0.7% vanadium 0.15 to 0.3% columbium 0.10 to 0.3%... | 08/17/1999 |
| 5928442 | Medium/high carbon low alloy steel for warm/cold forming A medium/high carbon low alloy steel which can be cold formed by cold or warm forging and heat treated. The material consists essentially of: ______________________________________ Element Weight Percent _______________________________... | 07/27/1999 |
| 5888450 | Fine grained ductile plastic injection molds forging tools and machine components and alloy steel therefor having a titanium nitride pinned austenitic grain structure Fabricated components, such as plastic injection molds, forging tools and machine components formed from a fine grained, low phosphorus, high hardness, high wear resistance, high hardenability, good machineability and high polishability, low alloy steel w... | 03/30/1999 |
| 5876521 | Ultra high strength, secondary hardening steels with superior toughness and weldability High strength steel is produced by a first rolling of a steel composition, reheated above 1100° C., above the austenite recrystallization, a second rolling below the austenite recrystallization temperature, water cooling from above Ar3 to less... | 03/02/1999 |
| 5866066 | Age hardenable alloy with a unique combination of very high strength and good toughness An age hardenable martensitic steel alloy having a unique combination of very high strength and good toughness consists essentially of, in weight percent, about ______________________________________ C 0.21-0.34 Mn ... | 02/02/1999 |
| 5855845 | Low alloy steel for the manufacture of molds for plastics Steel for the manufacture of molds for injection molding of plastics, wherein its chemical composition contains, by weight: 0.35%ࣘCࣘ0.5%, 0%ࣘSiࣘ0.5%, 0.2%ࣘMnࣘ2.5%, 0%ࣘNiࣘ4%, 0%ࣘCrࣘ4%, 0%ࣘMo+W/2ࣘ2%, 0%ࣘCuࣘ1%, 0%ࣘV+Nb... | 01/05/1999 |
| 5820819 | Steel for chimney or gas duct, excellent in pitting resistance and rust adhesion The present invention has an object to provide a steel for a chimney or a gas duct, which is excellent in pitting resistance and rust adhesion in a corrosive environment caused by combustion waste gas in a plant in which the combustion of natural gas occu... | 10/13/1998 |
