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Class Information
Number: 420/120
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > 1.5 percent or more manganese containing, but less than 8 percent
Description: Alloy or metallic composition which additionally contains 1.5 percent or more manganese.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8691030 Low alloy steels with superior corrosion resistance for oil country tubular goods Apr. 8, 2014
8641836 Steel plate for line pipe excellent in strength and ductility and method of production of same Feb. 4, 2014
8562762 High strength hot rolled steel products for line-pipes excellent in low temperature toughness and production method of the same Oct. 22, 2013
8512487 Seamless expandable oil country tubular goods and manufacturing method thereof Aug. 20, 2013
8465600 High-strength steel sheet having excellent workability Jun. 18, 2013
8361248 Steel superior in CTOD properties of weld heat-affected zone and method of production of same Jan. 29, 2013
8349471 High-strength cold-rolled steel sheet excellent in workability and shape freezing property Jan. 8, 2013
8182740 High-strength steel sheets excellent in hole-expandability and ductility May. 22, 2012
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 Apr. 24, 2012
8084143 High-yield-ratio and high-strength thin steel sheet superior in weldability and ductility, high-yield-ratio high-strength hot-dip galvanized thin steel sheet, high-yield ratio high-strength ho Dec. 27, 2011
8071018 High carbon hot-rolled steel sheet Dec. 6, 2011
8052808 High strength hot rolled steel sheet with excellent press workability and method of manufacturing the same Nov. 8, 2011
8048367 High strength thick-gauge steel plate superior in weldability and having tensile strength of 780 MPA or more and method of production of same Nov. 1, 2011
7998282 Heat treatment method of steel components, steel components and manufacture method of steel components Aug. 16, 2011
7842141 Stainless-steel pipe for oil well and process for producing the same Nov. 30, 2010
7820099 Hot rolled steel sheet excellent in chemical convertibility and method of production of the same Oct. 26, 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 Aug. 24, 2010
7678204 Good-workability and high-strength cold-rolled steel sheet excellent in post-painting corrosion resistance Mar. 16, 2010
7591977 High strength and low yield ratio cold rolled steel sheet and method of manufacturing the same Sep. 22, 2009
7488396 Superior in machinability and method of production of same Feb. 10, 2009
7455736 High tensile strength steel sheet excellent in processibility and process for manufacturing the same Nov. 25, 2008
7252721 Power transmission shaft Aug. 7, 2007
6824672 Use of austenitic stainless steels in applications requiring anti-coking properties Nov. 30, 2004
6660105 Case hardened steel excellent in the prevention of coarsening of particles during carburizing thereof, method of manufacturing the same, and raw shaped material for carburized parts Dec. 9, 2003
6440579 Process for producing a drawn wire made of stainless steel, in particular a wire for reinforcing tires, and wire obtained by the process Aug. 27, 2002
6228183 Ultra-high strength, weldable, boron-containing steels with superior toughness May. 8, 2001
5882585 Steel material with high thermal-resistance for producing engine piston upper parts Mar. 16, 1999
5858130 Composition and method for producing an alloy steel and a product therefrom for structural applications Jan. 12, 1999
5853903 Steel sheet for excellent panel appearance and dent resistance after panel-forming Dec. 29, 1998
5851481 Rebar with vanadium alloy Dec. 22, 1998
5338508 Alloy steel powders for injection molding use, their compounds and a method for making sintered parts from the same Aug. 16, 1994
5256219 Steel reinforcement tube Oct. 26, 1993
5252148 Soft magnetic alloy, method for making, magnetic core, magnetic shield and compressed powder core using the same Oct. 12, 1993
5141570 High strength low carbon steel wire rods Aug. 25, 1992
5100613 Hot-rolled microalloyed steel and its use in variable-thickness sections Mar. 31, 1992
5067993 Magnetic core material made of Fe-Co base alloy for high frequencies Nov. 26, 1991
4946519 Semi-processed non-oriented electromagnetic steel strip having low core loss and high magnetic permeability, and method of making Aug. 7, 1990
4891274 Hot-dip aluminum coated steel sheet having excellent corrosion resistance and heat resistance Jan. 2, 1990
4855105 Wear-resistant steel Aug. 8, 1989
4842657 Amorphous alloys containing iron group elements and zirconium and particles made of said alloys Jun. 27, 1989
4544406 Spring steel having a good sag-resistance and a good hardenability Oct. 1, 1985
4531974 Work-hardenable austenitic manganese steel and method for the production thereof Jul. 30, 1985
4510706 Cutting-tooth anchor for suction dredge and method of making same Apr. 16, 1985
4491476 Boron-containing steel and a process for producing the same Jan. 1, 1985
4475961 High remanence iron-manganese alloys for magnetically actuated devices Oct. 9, 1984
4448617 Steel for a vehicle suspension spring having good sag-resistance May. 15, 1984
4437891 Oil-atomized low-alloy steel powder Mar. 20, 1984
4396425 Addition agent for adding vanadium to iron base alloys Aug. 2, 1983
4358316 Alloys for hydrogen storage Nov. 9, 1982
4348229 Enamelling steel sheet Sep. 7, 1982

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