Class 420/90 - Chromium containing

Subclass of Class 420 - Alloys or metallic compositions
Definition: Alloy or metallic composition which additionally contains chromium.
No. of patents: 32
Last issue date: 12/06/2011

Number	Title	Issue Date
8071017	Low cost high strength martensitic stainless steel A cobalt-free low cost high strength martensitic stainless steel, with concentration of Ni up to 3.0% and Mo up to 1.0% of weight, has HRC of 53, UTS of 297 ksi, YS of 220 ksi, Charpy V-notch impact energy of 17.8 ft-lb, corrosion resistance in salt spray test ASTM ...	12/06/2011
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
6454881	Non-refined steel being reduced in anisotropy of material and excellent in strength, toughness and machinability Provided is a non heat-treated steel that requires no particular controls over cooling rates and no aging treatments after hot working, that can sufficiently increase tensile strength, yield strength and toughness even at lightly deformed parts, and furth...	09/24/2002
6426038	Universal alloy steel A composition and method for reducing cost and improving the mechanical properties of alloy steels. The invention resides in the ability of certain combinations of carbon-subgroup surfactants and d-transition metals to modify and control diffusion mechani...	07/30/2002
6290904	Welding materials for high-Cr steels This invention relates to welding materials for high-Cr steels which exhibit higher toughness and improved creep characteristics. Specifically, this invention relates to a welding material for high-Cr steels which contains, on a weight percentage basis, 0...	09/18/2001
6287395	High-energy weldable soft magnetic steel and its use for parts of magnetic suspension railways A high-energy weldable soft magnetic steel with high toughness in the heat-affected zone of weld joints, high specific electric resistance to reduce eddy currents, aging resistance and weathering resistance comprises 0.65 to 1.0 to 2.0% s...	09/11/2001
6277895	Skeletal iron catalyst having improved attrition resistance and product selectivity in slurry-phase synthesis processes Particulate skeletal iron catalyst is provided which contain at least about 50 wt. % iron with the remainder being a minor portion of a suitable non-ferrous metal and having characteristics of 0.062-1.0 mm particle size, 20-100 m2 /g surface ar...	08/21/2001
6271642	Advanced battery controller with state of charge control Battery powered equipment is provide with a controller which monitors the voltage supplied by the battery. Should the battery voltage drop below a preset level when the equipment is inactive, the controller disconnects non-essential loads of the equipment...	08/07/2001
6265451	Skeletal iron catalyst and its preparation for Fischer-Tropsch synthesis processes Skeletal iron catalysts are prepared and utilized for producing hydrocarbon products from CO and H2 feeds by Fischer-Tropsch synthesis process. Iron powder is mixed with aluminum, antimony, silicon, tin or zinc powder and 0.01-5 wt % metal prom...	07/24/2001
6193930	Brazing alloy Two or more metal or alloy parts (such as catalytic convertor parts) are brazed by melting a homogeneous nickel-based brazing filler alloy containing boron in an amount of not more than 0.2% by weight; converting the molten alloy to a powder of uniform co...	02/27/2001
6187261	Si(Ge)(-) Cu(-)V Universal alloy steel A composition and method for reducing cost and improving the mechanical properties of alloy steels. The invention resides in the ability of certain combinations of carbon-subgroup surfactants and d-transition metals to modify and control diffusion mechani...	02/13/2001
6165289	Water-resistant long-life rolling bearing A water-resistant and long-life rolling bearing used in an environment involving water's seeping in the lubricant thereof, wherein at least one of the inner race, the outer race, and the rolling member is formed of alloy steel containing 0.05 to 0.60% by ...	12/26/2000
5951944	Lowly decarburizable spring steel A lowly decarburizable spring steel comprises, on a weight basis, 0.51 to 0.70% of C, 0.15 to 2.50% of Si, 0.40 to 1.20% of Mn, 0.005 to 0.100% of Al, 0.005 to 0.050% of S, at least one of 0.05 to 0.30% of Ni and 0.05 to 1.00% of Cu and, optionally, at le...	09/14/1999
5817275	Steel plate having excellent corrosion resistance and sulfide stress cracking resistance A steel plate comprising by weight C: 0.01 to 0.1%, Si: 0.02 to 0.5%, Mn: 0.6 to 2.0%, P	10/06/1998
5743972	Heavy-wall structural steel and method A heavy-wall steel having a flange thickness of about 40 mm or more and possessing excellent strength, toughness, weldability, and seismic resistance capable of being used for structure members such as columns and beams of high-rise buildings. The heavy-w...	04/28/1998
5445686	Fe-Cu alloy sheet having an alloy structure of high uniformity An Fe-Cu alloy sheet manufactured by a thin plate continuous casting method so as to be used as a material of electronic and magnetic parts. The alloy sheet has an alloy structure of high uniformity which contains 20 to 90% Cu, 1 to 10% Cr, 0 to 10% Mo, a...	08/29/1995
5252148	Soft magnetic alloy, method for making, magnetic core, magnetic shield and compressed powder core using the same A soft magnetic alloy having a composition of general formula: (Fe1-a Nia)100-x-y-z-p-q Cux Siy Bz Crp M1q (I) wherein M	10/12/1993
5192497	Superalloys with low thermal-expansion coefficient A superalloy with a low thermal expansion coefficient has of 0.1% or less of C, 1.0% of less or Si, 1.0% or less of Mn, 0.5 to 2.5% of Ti, more than 3.0% and not more than 6.0% of Nb, 0.01% or less of B, 20 to 32% of Ni and more than 16% and not more than...	03/09/1993
5049210	Oil Country Tubular Goods or a line pipe formed of a high-strength martensitic stainless steel A high-strength martensitic stainless steel excellent in corrosion resistance and stress corrosion cracking resistance, the composition of which comprises: 0.1% or less carbon, 1% or less silicon, 2% or less manganese, 8-14% chromium, 1.2-4.5% copper, 0.0...	09/17/1991
5045279	Corrosion-resistant carbon steel with good drawability characteristics A corrosion-resistant carbon sheet steel with good stamping characteristics is disclosed as relating to compositions for steel resistant to atmospheric corrosion, obtained from a basis composition containing elements such as C, Mn, P, S, Al, Si, and Cu, t...	09/03/1991
5013525	Steel for corrosion-resistant rolling part and rolling part The present invention provides a steel for a corrosion-resistant rolling part having excellent corrosion resistance, high quenching and tempering hardness, and excellent workability for use in linear bearings, ball screws and rolling bearings of industria...	05/07/1991
4869758	Iron/copper/chromium alloy material for high-strength lead frame or pin grid array An iron/copper/chromium alloy material for a high-strength lead frame or pin grid array, which comprises 20 to 90% by weight of Cu and 2.5 to 12% by weight of Cr, with the balance being mainly iron, and which has an average grain size number of at least 1...	09/26/1989
4650645	Heat-resisting steels A heat-resisting steel suitable for use in valve parts of internal combustion engine is disclosed, which consists essentially by weight percentage of 0.3-0.5% of C, more than 1.0% to 2.5% of Si, 0.1-2.0% of Mn, 0.5-7.0% of Cr, 0.3-2.0% of Mo and 0.1-1.0% ...	03/17/1987
4360381	Ferritic stainless steel having good corrosion resistance A 10-35% Cr ferritic stainless steel stabilized with 0.20-1.00% of Nb wherein Nb%ࣙ(8×C%+2.0%) with impurities, such as carbon, nitrogen, phosphorous, oxygen and sulfur reduced to given levels is disclosed. By reducing the sulfur content to a level of n...	11/23/1982
4350525	Magnetic suspension railroad parts A magnetic suspension railroad magnetically active part is made of steel with the following composition: 0 to 0.15--% carbon, 0 to 0.045--% phosphorus, 0 to 0.008--% nitrogen, 0.75 to 2.0--% silicon, 0.15 to 1.00--% manganese, 0.02 to 0.07--% aluminum, soluble, 0.2...	09/21/1982
4348229	Enamelling steel sheet An enamelling steel sheet comprising not larger than 0.10% carbon, 0.01 to 0.10% aluminum, 0.004 to 0.020% boron, 0.007 to 0.020% nitrogen, the balance being iron and unavoidable impurities....	09/07/1982
4266974	Alloy steel powder having excellent compressibility, moldability and heat-treatment property An alloy steel powder having a basic alloy composition, which is composed of at least one of manganese, chromium, molybdenum and vanadium, and the remainder being iron, and having low carbon, nitrogen and oxygen contents is excellent in the compressibilit...	05/12/1981
4261768	Low alloyed steel having improved corrosion behavior, in particular relative to sea water A low alloyed structural steel for desalination plants with improved corrosion behavior has a carbon content of between 0.01 and 0.15 percent, a chromium content of between 2.0 and 4.5 percent and a columbium content of between 0.1 and 1.0 percent, and if...	04/14/1981
4253874	Alloys steel powders A finely divided annealed steel powder consisting by weight of up to 1.5% carbon, 1.0 to 2.0% chromium, less than 0.05% silicon, less than 0.1% manganese and either one or a combination of two or more of the following elements: 0.2 to 1.0% molybdenum, 0.2...	03/03/1981
4210445	Niobium-containing weldable structural steel having good weldability Disclosed herein is a niobium-containing weldable structural steel having good weldability which consists of 0.005-0.04% of C, 0.01-0.50% of Si, 1.20-2.50% of Mn, 0.01-0.07% of Nb, 0.005-0.030% of Ti, 0.005-0.06% of Al and the balance of iron and inevitab...	07/01/1980
4094670	Weathering steel with high toughness A weathering steel has high toughness and rapidly develops a protective oxide coating and contains C 0.05 - 0.15, Mn 0.5 - 1.5, Cu 0.2 - 0.5,Al 0.2 - 0.5, Si 0.1 - 0.8, Cr 0.5 - 1.5, S up to 0.02, P up to 0.04, Nb up to 0.020, N up to 0.010 Mo up to 0.15,...	06/13/1978
3954421	Alloys for high creep applications There is disclosed a ferritic alloy having a high creep resistance particularly suitable for use in the castings, the welding material, and welds of the casings and conductors of apparatus operating at high temperatures, typically steam turbines operating...	05/04/1976

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Class 420/90 - Chromium containing