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US20140014234 CASE HARDENING STEEL, METHOD FOR PRODUCING SAME, AND MECHANICAL STRUCTURAL PART USING CASE HARDENING STEEL  
A case hardening steel, which has excellent cold forgeability and excellent crystal grain coarsening prevention characteristics after carburization, contains, in mass %, 0.05-0.20% of C, 0.01-0.1%...
US20120031532 Steel plate for line pipe excellent in strength and ductility and method of production of same  
The present invention provides steel plate for line pipe excellent in strength and ductility and a method of production of the same. The steel plate has a steel composition containing, by mass %,...
US20110023991 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...
US20150030882 STEEL PLATE FOR PRODUCING LIGHT STRUCTURES AND METHOD FOR PRODUCING SAID PLATE  
The invention relates to a steel plate, the chemical composition of which comprises, the contents being expressed by weight: 0.010%≦C≦0.20%, 0.06%≦Mn≦3%, Si≦1.5%, 0.005%≦Al≦1.5%, S≦0.030%,...
US20130174942 STEEL PLATE FOR PRODUCING LIGHT STRUCTURES AND METHOD FOR PRODUCING SAID PLATE  
The invention relates to a steel plate, the chemical composition of which comprises, the contents being expressed by weight: 0.010%≦C≦0.20%, 0.06%≦Mn≦3%, Si≦1.5%, 0.005%≦Al≦1.5%, S≦0.030%,...
US20110017355 FERRITIC HEAT-RESISTANT STEEL  
Disclosed is a ferritic heat-resistant steel which has the following chemical composition (by weight): C: from 0.01% to less than 0.08%; Si: 0.30-1.0%; P: 0.02 or less; S: 0.010% or less; Mn:...
US20150090370 HIGH STRENGTH STEEL PLATE HAVING LOW YIELD RATIO EXCELLENT IN TERMS OF STRAIN AGEING RESISTANCE, METHOD OF MANUFACTURING THE SAME AND HIGH STRENGTH WELDED STEEL PIPE MADE OF THE SAME  
A steel plate has a chemical composition containing, by mass %, C: 0.03% or more and 0.08% or less, Si: 0.01% or more and 1.0% or less, Mn: 1.2% or more and 3.0% or less, P: 0.015% or less, S:...
US20140000767 STEEL WIRE ROD AND METHOD OF PRODUCING SAME  
A steel wire rod which is a material of steel wires includes, as a metallographic structure, by area %, 95% to 100% of a pearlite, wherein an average pearlite block size at a central portion of...
US20150059912 HIGH STRENGTH STEEL PLATE HAVING LOW YIELD RATIO EXCELLENT IN TERMS OF STRAIN AGEING RESISTANCE, METHOD OF MANUFACTURING THE SAME AND HIGH STRENGTH WELDED STEEL PIPE MADE OF THE SAME  
A steel plate has a chemical composition containing, by mass %, C: 0.03% or more and 0.08% or less, Si: 0.01% or more and 1.0% or less, Mn: 1.2% or more and 3.0% or less, P: 0.015% or less, S:...
US20130133789 STEEL WIRE OF SPECIAL STEEL AND WIRE ROD OF SPECIAL STEEL  
A predetermined composition is had, when a C content is represented by (C %), in a case of (C %) being not less than 0.35% nor more than 0.65%, a volume fraction of pearlite is 64×(C %)+52% or...
US20150114527 STEEL FOR OIL COUNTRY TUBULAR GOODS AND METHOD OF PRODUCING THE SAME  
A steel for oil country tubular goods includes, as a chemical composition, by mass %, C, Si, Mn, Al, Mo, P, S, O, N, and a balance containing Fe and impurities, wherein a full width at half...
US20150010775 HOT STAMPED STEEL AND METHOD FOR PRODUCING HOT STAMPED STEEL  
A hot stamped steel according to the present invention satisfies an expression of (5×[Si]+[Mn])/[C]>11 when [C] represents an amount of C by mass %, [Si] represents an amount of Si by mass %, and...
US20130174943 CASE HARDENED STEEL AND METHOD FOR PRODUCING SAME  
A case hardened steel with excellent cold forgeability and excellent impact properties after case hardening processing contains C, Si, Mn, S, Cr, Al, Ti, Nb, B, and N, with the balance being iron...
US20150050519 HOT STAMPED STEEL AND METHOD FOR PRODUCING THE SAME  
In a hot stamped steel, when [C] represents an amount of C (mass %), [Si] represents an amount of Si (mass %), and [Mn] represents an amount of Mn (mass %), an expression of 5×[Si]+[Mn])/[C]>10 is...
US20130087250 STEEL FOR NITRIDING AND NITRIDED PART  
The present invention provides a steel for nitriding with a composition including, by mass %: C: 0.10% to 0.20%; Si: 0.01% to 0.7%; Mn: 0.2% to 2.0%; Cr: 0.2% to 2.5%; Al: 0.01% to less than...
US20120318410 STRAND FOR SAW WIRE AND MANUFACTURING METHOD THEREOF  
Regarding contents of C, Si, Mn and Cr, a value of parameter P represented by the following (equation 1) is 1000 or more. A metallic structure contains wire-drawn pearlite in an area ratio of 98%...
US20140053955 STEEL FOR COLD PUNCHING AND STEEL ELEMENT FOR STEEL BELT USING THE SAME  
A steel used in a belt-type CVT that is superior in wear resistance and toughness, and a steel for cold punching, that provides the same. The steel satisfies the following: 10.8 [C]+5.6 [Si]+2.7...
US20110017356 HIGH-STRENGTH STEEL PLATE EXCELLENT IN DROP WEIGHT PROPERTIES AND BASE STEEL TOUGHNESS  
Disclosed is a steel plate having a specific chemical component composition. The steel plate has an F value defined by the following expression (1) and satisfying the following condition: 3.20≦(F...
US20140083574 HEAT-HARDENED STEEL WITH EXCELLENT CRASHWORTHINESS AND METHOD FOR MANUFACTURING HEAT-HARDENABLE PARTS USING SAME  
Disclosed are heat-hardened steel with excellent crashworthiness and a method for manufacturing heat-hardenable parts using the same. The heat-hardened steel according to the invention comprises,...
US20120279621 STEEL, STEEL FLAT PRODUCT, STEEL PART AND METHOD FOR PRODUCING A STEEL PART  
Disclosed is a steel, a steel flat product, a steel part produced from it by hot forming with subsequent hardening, and a method for producing a steel part. In order to guarantee to a high degree...
US20110226389 PEARLITE RAIL  
A pearlite rail contains, by mass %, 0.65 to 1.20% of C; 0.05 to 2.00% of Si; 0.05 to 2.00% of Mn; and the balance composed of Fe and inevitable impurities, wherein at least part of the head...
US20120193000 STEEL FOR INDUCTION HARDENING AND INDUCTION HARDENED STEEL PART AND METHODS OF PRODUCTION OF SAME  
Steel for induction hardening wherein coarsening of austenite crystal grains can be prevented even at a high temperature of over 1100° C. such as which occurs at projecting parts of steel parts at...
US20110253271 HIGH-STRENGTH STEEL PLATE AND PRODUCING METHOD THEREFOR  
A high-strength steel plate includes the following composition: 0.18 to 0.23 mass % of C; 0.1 to 0.5 mass % of Si; 1.0 to 2.0 mass % of Mn; 0.020 mass % or less of P; 0.010 mass % or less of S;...
US20140261918 ENHANCED WEAR RESISTANT STEEL AND METHODS OF MAKING THE SAME  
Improved steel compositions and methods of making the same are provided. The present disclosure provides advantageous wear resistant steel. More particularly, the present disclosure provides high...
US20140322559 High-Strength Flat Steel Product and Method for Producing Same  
A flat steel product having a tensile strength of at least 1200 MPa and consists of steel containing (wt %) C: 0.10-0.50%, Si: 0.1-2.5%, Mn: 1.0-3.5%, Al: up to 2.5%, P: up to 0.020%, S: up to...
US20090020190 Fire Resistant High Strength Rolled Steel Material and Method of Production of The Same  
A fire resistant high strength rolled steel material superior in fire resistance and toughness used for a structural member of a building etc. containing, by mass %, C: 0.005% to less than...
US20110168302 HIGH-STRENGTH ULTRATHIN STEEL WIRE AND METHOD OF MANUFACTURING THE SAME  
The present invention provides a steel wire, including chemical components of: C: 0.7-1.2 mass %; Si: 0.05-2.0 mass %; and Mn: 0.2-2.0 mass %, with a balance including Fe and inevitable...
US20120160376 HEAT RESISTANT CAST STEEL, MANUFACTURING METHOD THEREOF, CAST PARTS OF STEAM TURBINE, AND MANUFACTURING METHOD OF CAST PARTS OF STEAM TURBINE  
A heat resistant cast steel of an embodiment contains in percent by mass C: 0.05-0.15, Si: 0.03-0.2, Mn: 0.1-1.5, Ni: 0.1-1, Cr: 8-10.5, Mo: 0.2-1.5, V: 0.1-0.3, Co: 0.1-5, W: 0.1-5, N:...
US20110041965 HIGH STRENGTH THICK-GAUGE STEEL PLATE SUPERIOR IN WELDABILITY AND HAVING TENSILE STRENGTH OF 780 MPA OR MORE AND METHOD OF PRODUCTION OF SAME  
The present invention provides high strength thick-gauge steel plate superior in weldability and having a tensile strength of 780 MPa or more and provides a method of production of the high...
US20130048158 SPRING STEEL AND METHOD FOR MANUFACTURING THE SAME  
Disclosed is high strength spring steel that can limit the depth of pitting occurring when corroded and therefore possesses high strength as well as excellent pitting corrosion resistance and...
US20150232971 ABRASION RESISTANT STEEL PLATE HAVING EXCELLENT LOW-TEMPERATURE TOUGHNESS AND EXCELLENT CORROSIVE WEAR RESISTANCE  
An abrasion resistant steel plate which possesses excellent abrasion resistance, excellent low-temperature toughness and excellent corrosive wear resistance. The abrasion resistant steel plate...
US20150047752 HIGH STRENGTH INTERSTITIAL FREE LOW DENSITY STEEL AND METHOD FOR PRODUCING SAID STEEL  
A high strength interstitial free low density steel and method for producing the steel.
US20140363696 HIGH-STRENGTH HOT ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME  
A high-strength hot rolled steel sheets with excellent stretch flangeability has small variations in mechanical properties in individual coils. Variations in strength from place to place in a coil...
US20140230969 TRIP-AIDED DUAL-PHASE MARTENSITIC STEEL AND ULTRAHIGH-STRENGTH-STEEL PROCESSED PRODUCT USING SAME  
Provided is a TRIP-aided dual-phase martensitic steel which is excellent in terms of strength-elongation balance and Charpy impact value and has dual-phase martensite composed of a soft lath...
US20110079328 HIGH STRENGTH HOT ROLLED STEEL SHEET FOR LINE PIPE USE EXCELLENT IN LOW TEMPERATURE TOUGHNESS AND DUCTILE FRACTURE ARREST PERFORMANCE AND METHOD OF PRODUCTION OF SAME  
The present invention has as its object the provision of hot rolled steel sheet (hot coil) for line pipe use in which API5L-X80 standard or better high strength and low temperature toughness and...
US20130233454 HIGH HARDNESS, HIGH TOUGHNESS IRON-BASE ALLOYS AND METHODS FOR MAKING SAME  
An aspect of the present disclosure is directed to low-alloy steels exhibiting high hardness and an advantageous level of multi-hit ballistic resistance with low or no crack propagation imparting...
US20110100516 Bake Hardening Steel with Excellent Surface Properties and Resistance to Secondary Work Embrittlement, and Preparation Method Thereof  
Provided are a bake hardening steel having a crystalline grain size of ASTM No. 9 or more and a method for preparing the bake hardening steel by controlling the winding, rolling and cooling...
US20070051434 Ready-use low-carbon steel mechanical component for plastic deformation and method for making same  
A ready-for-use low-carbon steel mechanical component, like wheel swivel joints of terrestrial vehicles, pins, shafts, suspension bars, links . . . with elevated characteristics obtained by a hot...
US20110259482 Use of a Steel Alloy for Well Pipes for Perforation of Borehole Casings, and Well Pipe  
Use of a steel alloy for well pipes of perforating units for perforation of borehole casings, with the steel alloy comprised, in mass-%, of Carbon (C) 0.12-0.25, Manganese (Mn) 0.5-2.0, Silicon...
US20090250146 High Strength Thick-Gauge Electric-Resistance Welded Steel Pipe Excellent in Hardenability, Hot Workability and Fatigue Strength and Method of Production of the Same  
The present invention provides high strength thick-gauge electric-resistance welded steel pipe excellent in hardenability, hot workability, and fatigue strength and a method of production of the...
US20110239835 STEEL FOR MACHINE STRUCTURE USE EXCELLENT IN CUTTING TOOL LIFETIME AND MACHINING METHOD OF SAME  
Steel for machine structure use excellent in tool lifetime in a broad range of cutting speeds regardless of continuous machining, intermittent machining, or other systems and further in various...
US20130025747 STEEL FOR INDUCTION HARDENING, ROUGHLY SHAPED MATERIAL FOR INDUCTION HARDENING, PRODUCING METHOD THEREOF, AND INDUCTION HARDENING STEEL PART  
A steel for an induction hardening including, by mass %, C: more than 0.75% to 1.20%, Si: 0.002 to 3.00%, Mn: 0.20 to 2.00%, S: 0.002 to 0.100%, Al: more than 0.050% to 3.00%, P: limited to 0.050%...
US20120279620 HIGH STRENGTH HOT-ROLLED STEEL PLATE EXHIBITING EXCELLENT ACID PICKLING PROPERTY, CHEMICAL CONVERSION PROCESSABILITY, FATIGUE PROPERTY, STRETCH FLANGEABILITY, AND RESISTANCE TO SURFACE DETERIORATION DURING MOLDING, AND HAVING ISOTROPIC STRENGTH AND DUCTILITY, AND METHOD FOR PRODUCING SAID HIGH STRENGTH HOT-ROLLED STEEL PLATE  
This high strength hot-rolled steel sheet includes: in terms of percent by mass, C: 0.05 to 0.12%; Si: 0.8 to 1.2%; Mn: 1.6 to 2.2%; Al: 0.30 to 0.6%; P: 0.05% or less; S: 0.005% or less; and N:...
US20150167112 ROLLED WIRE ROD AND MANUFACTURING METHOD THEREOF  
A rolled wire rod includes, as a chemical component, by mass %, C: 0.95% to 1.10%, Si: 0.10% to 0.70%. Mn: 0.20% to 1.20%, and Cr: 0.90% to 1.60%, the balance consisting of Fe and unavoidable...
US20140216609 HIGH STRENGTH HOT-ROLLED STEEL SHEET FOR WELDED STEEL LINE PIPE HAVING EXCELLENT SOURING RESISTANCE, AND METHOD FOR PRODUCING SAME (AS AMENDED)  
A steel material containing 0.01% to 0.07% C, 0.40% or less Si, 0.5% to 1.4% Mn, 0.1% or less Al, 0.01% to 0.15% Nb, 0.1% or less V, 0.03% or less Ti, and 0.008% or less N on a mass basis, Nb, V,...
US20130008570 ULTRAHIGH-STRENGTH STEEL SHEET WITH EXCELLENT WORKABILITY, AND MANUFACTURING METHOD THEREOF  
Disclosed is an ultra high strength steel plate with at least 1100 MPa of tensile strength that has both an excellent strength-stretch balance and excellent bending workability, and a method for...
US20080017283 Steel For Machine Structural Use With Excellent Strength, Ductility, And Toughness And Method For Producing The Same  
A steel for machine structural use with a better strength-ductility-toughness balance than maraging steel and applications thereof are provided. The steel for machine structural use with excellent...
US20130056115 AUTOMOBILE CHASSIS PART EXCELLENT IN LOW CYCLE FATIGUE CHARACTERISTICS AND METHOD OF PRODUCTION OF SAME  
An automobile chassis part which is excellent in low cycle fatigue characteristics, characterized by being formed by steel which contains, by mass %, C: 0.02 to 0.10%, Si: 0.05 to 1.0%, Mn: 0.3 to...
US20120222781 HIGH STRENGTH STEEL PLATE WITH ULTIMATE TENSILE STRENGTH OF 900 MPa OR MORE EXCELLENT IN HYDROGEN EMBRITTLEMENT RESISTANCE AND METHOD OF PRODUCTION OF SAME  
High strength steel plate with an ultimate tensile strength of 900 MPa or more which is excellent in hydrogen embrittlement resistance characterized in that, in the structure of the steel plate,...
US20080264524 High-Strength Steel and Metal Bolt Excellent In Character of Delayed Fracture  
A high-strength steel having excellent character of delayed fracture can be manufactured at a low cost without adding expensive alloy elements such as Ni, Co or V in large quantities. The steel...

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