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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...
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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...
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8163108 |
High-strength cold-rolled steel sheet, high-strength galvanized steel sheet, and high-strength alloyed hot-dip galvanized steel sheet having excellent formability and weldability, and methods for manufacturing the same
This cold-rolled steel sheet includes, in terms of mass %, C: not less than 0.05% and not more than 0.095%, Cr: not less than 0.15% and not more than 2.0%, B: not less than 0.0003% and not more...
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8152939 |
Non-heat treated connecting rod and method of manufacturing the same
A non-heat treated connecting rod which comprises, by mass %, C: 0.25-0.35%, Si: 0.50-0.70%, Mn: 0.60-0.90%, P: 0.040-0.070%, S: 0.040-0.130%, Cr: 0.10-0.20%, V: 0.15-0.20%, Ti: 0.15-0.20% and N:...
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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...
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8142576 |
Clutch member and process for manufacturing the same
A clutch member and a process for manufacturing the same. In the clutch member, a steel sheet has an initial composition of 0.32 to 0.38% of C, 0.15% or less of Si, 0.3 to 0.5% of Mn, and 0.16 to...
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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...
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8110292 |
High strength steel plate, steel pipe with excellent low temperature toughness, and method of production of same
The present invention provides high strength steel plate with excellent low temperature toughness, high strength steel pipe using this as a base metal, and methods of production of the same. The...
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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...
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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%,...
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8084144 |
High strength thick welded steel pipe for line pipe superior in low temperature toughness and method of production of the same
The present invention provides high strength thick welded steel pipe for line pipe superior in low temperature toughness, and a method of production of the same. A base material steel plate...
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8070889 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
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...
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8071018 |
High carbon hot-rolled steel sheet
A high carbon hot-rolled steel sheet which is a hot-rolled spheroidizing annealed material, including 0.2 to 0.7% C, 2% or less Si, 2% or less Mn, 0.03% or less P, 0.03% or less S, 0.08% or less...
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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,...
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8052812 |
Method of manufacturing high carbon cold-rolled steel sheet
A high carbon cold-rolled steel sheet having both excellent stretch-flange formability and excellent homogeneity of hardness in the sheet thickness direction is provided by a manufacturing method...
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8048237 |
Ultra soft high carbon hot rolled steel sheet and method for manufacturing same
An ultra soft high carbon hot-rolled steel sheet has excellent workability. The steel sheet is a high carbon hot-rolled steel sheet containing 0.2 to 0.7% C, and has a structure in which mean grain...
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8048238 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
High young's modulus steel plate and method of production of same
Steel sheet having a composition of ingredients containing substantially, by mass %, C: 0.005 to 0.200%, Si: 2.50% or less, Mn: 0.10 to 3.00%, N: 0.0100% or less, Nb: 0.005 to 0.100%, and Ti: 0.002...
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8043444 |
Steel wire for cold-formed spring excellent in corrosion resistance and method for producing the same
A steel wire for a cold-formed spring according to the present invention contains a prescribed chemical component composition, wherein: a martensitic transformation start temperature MS1 shown by...
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8038934 |
High-strength spring steel excellent in brittle fracture resistance and method for producing same
A spring steel having a high strength of 1900 MPa or more and superior in the brittle fracture resistance, as well as a method for manufacturing the same, are provided. The high strength spring...
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8039118 |
Welded steel pipe for high strength line pipe superior in low temperature toughness and method of production of the same
The present invention provides high strength welded steel pipe for line pipe inexpensive in cost and superior in low temperature toughness, and a method of production of the same, produced by...
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8038809 |
High strength hot rolled steel sheet excellent in bore expanding workability and method for production thereof
A high-strength hot-rolled steel sheet containing C: 0.05 to 0.15%, Si: no more than 1.50% (excluding 0%), Mn: 0.5 to 2.5%, P: no more than 0.035% (excluding 0%), S: no more than 0.01% (including...
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8034199 |
Case-hardening steel excellent in cold forgeability and low carburization distortion property
This invention provides a case-hardening steel excellent in cold forgeability and low carburization distortion property that exhibits low deformation resistance and high limit compressibility when...
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8007603 |
High-strength steel for seamless, weldable steel pipes
A low-alloy steel containing, by weight percent, C 0.03-0.13%, Mn 0.90-1.80%, Si≦0.40%, P≦0.020%, S≦0.005%, Ni 0.10-1.00%, Cr 0.20-1.20%, Mo 0.15-0.80%, Ca≦0.040%, V≦0.10%, Nb≦0.040%, Ti≦0.020% a...
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8007716 |
Steel wire for high strength spring excellent in workability and high strength
A steel wire has tempered martensite, comprises, as essential components, by mass, C: 0.53 to 0.68%; Si: 1.2 to 2.5%; Mn: 0.2 to 1.5%; Cr: 1.4 to 2.5%; Al: 0.05% or less; further comprises, as a...
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8002909 |
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...
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7998285 |
Abrasion-resistant steel plate
The invention concerns a method for making an abrasion resistant steel plate having a chemical composition comprising: 0.1%≦C<0.23%; 0%≦Si≦2%; 0%≦Al≦2%; 0.5%≦Si+Al≦2%; 0%≦Mn≦2.5%; 0%≦Ni≦5%; 0%≦Cr≦5...
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7981224 |
Multi-phase steel sheet excellent in hole expandability and method of producing the same
The present invention provides a steel sheet excellent in both a balance between strength and elongation and a balance between strength and hole expandability, in other words, a multi-phase steel...
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7972451 |
Pearlitic steel rail excellent in wear resistance and ductility and method for producing same
The present invention is: a pearlitic steel rail excellent in wear resistance and ductility, characterized in that, in a steel rail having pearlite structure containing, in mass, 0.65 to 1.40% C,...
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7959745 |
High-strength steel pipe of API X65 grade or higher
A high-strength steel pipe having a strength of API X65 grade or higher consisting essentially of, by mass %, 0.02 to 0.08% of C, 0.01 to 0.5% of Si, 0.5 to 1.8% of Mn, 0.01% or less of P, 0.002%...
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7955445 |
Internal high hardness type pearlitic rail with excellent wear resistance and rolling contact fatigue resistance and method for producing same
An internal high hardness type pearlitic rail that has a composition containing 0.73% to 0.85% by mass C, 0.5% to 0.75% by mass Si, 0.3% to 1.0% by mass Mn, 0.035% by mass or less P, 0.0005% to...
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7935197 |
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...
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7931757 |
Seamless steel pipe for line pipe and a process for its manufacture
A thick-walled seamless steel pipe for line pipe which has a high strength and improved toughness and corrosion resistance in spite of the thick wall and which is suitable for use as a riser and...
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7922968 |
Corrosion resistance improved steel sheet for automotive muffler and method of producing the steel sheet
Provided are a steel sheet for an automotive muffler and a method for producing the steel sheet. The steel sheet includes 0.01% by weight or less of C, 0.1 to 0.3% by weight of Si, 0.3 to 0.5% by...
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7919194 |
High strength steel sheet having superior ductility
A high strength steel sheet and a method for manufacturing the same has superior phosphatability properties and hot-dip galvannealed properties besides a tensile strength of 950 MPa or more and a...
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7914629 |
High strength thick steel plate superior in crack arrestability
The present invention provides high strength thick steel plate superior in crack arrestability high in strength, free of deterioration of HAZ toughness, and free of anisotropy, that steel plate...
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7901520 |
Spring wire rod excelling in fatigue characteristics
Disclosed herein is a spring wire rod excelling in fatigue characteristics. It contains TiN inclusions having a specific size defined by the ratio of each group in all the visual fields as follows:...
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7887924 |
High-strength steel with excellent unsusceptibility to hydrogen embrittlement
A high-strength steel excellent in hydrogen embrittlement resistance is provided. The high-strength steel of the present invention excellent in hydrogen embrittlement resistance has a tensile...
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7887648 |
Ultrahigh-strength thin steel sheet
The invention relates to an ultrahigh-strength thin steel sheet excellent in the hydrogen embrittlement resistance, the steel sheet including, by weight %, 0.10 to 0.60% of C, 1.0 to 3.0% of Si,...
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7879160 |
Cold rolled dual-phase steel sheet
A steel sheet having (a) a dual phase microstructure with a martensite phase and a ferrite phase and (b) a composition containing by percent weight: 0.01% to 0.2% C; 0.3% to 3% Mn; 0.05% to 2% Si;...
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7875130 |
Crude oil tank comprising a corrosion resistant steel alloy
The present invention provides: a steel for a welded structure to be used for a crude oil tank that exhibits excellent general and local corrosion resistance in crude oil corrosion caused in a...
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7862667 |
Steels for sour service environments
Embodiments of the present application are directed towards steel compositions that provide improved properties under corrosive environments. Embodiments also relate to protection on the surface of...
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7854808 |
Steel sheet for vitreous enameling and production method
To provide a non-aging steel sheet for vitreous enameling, the steel sheet being excellent in resistance to bubbles and black spots, without the employment of decarbonization and denitrification...
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7794651 |
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...
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7789974 |
High-strength spring steel wire
The present invention provides a spring steel having both a high strength and a good coiling property after heat treatment, characterized by: containing, in mass, C: 0.4 to 1.2%, Si: 0.9 to 3.0%,...
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7776161 |
Cold-rolled 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,...
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7767036 |
High strength cold rolled steel sheet and plated steel sheet excellent in the balance of strength and workability
A high-strength cold-rolled steel sheet exhibiting an excellent strength-workability balance, including in percent by mass: 0.10-0.25% of C;1.0-2.0% of Si;1.5-3.0% of Mn;0.01% or less (not...
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7763123 |
Spring produced by a process comprising coiling a hard drawn steel wire excellent in fatigue strength and resistance to setting
Disclosed is a hard-drawn spring which exhibits fatigue strength and sag resistance equal or superior to springs produced using an oil-tempered wire. The hard-drawn spring is produced using a steel...
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7754031 |
Weldable steel building component and method for making same
The invention concerns weldable steel building components whereof the chemical composition comprises, by weight: 0.10%≦C≦0.22%, 0.50%≦Si≦1.50%, AI≦0.9%, 0%≦Mn≦3%, 0%≦Ni≦5%, 0%≦Cr≦4%, 0%≦Cu≦1...
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7749339 |
Process for manufacturing an airbag inflator bottle member
An airbag inflator bottle member comprising a tubular body having a reduced-diameter portion at an end portion for fitting an initiator or the like thereto in which the reduced-diameter portion has...
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7749338 |
High burring, high strength steel sheet excellent in softening resistance of weld heat affected zone and method of production of same
The present invention provides high burring, high strength steel sheet excellent in softening resistance of the weld heat affected zone and a method of production of the same, that is, high...
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