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Class Information
Number: 420/43
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Nine percent or more chromium containing > Eight percent or more nickel containing
Description: Alloy or metallic composition which additionally contains 8 percent or more of nickel.










Sub-classes under this class:

Class Number Class Name Patents
420/49 Copper containing 63
420/54 Group iv or v transition metal containing 54
420/52 Molybdenum containing 79
420/55 Over 0.1 percent carbon containing 27
420/50 Over 1.5 percent silicon containing 65
420/44 Over 2 percent manganese containing 40


Patents under this class:
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Patent Number Title Of Patent Date Issued
8540825 Low-temperature stainless steel carburization method Sep. 24, 2013
8529708 Carburized ballistic alloy Sep. 10, 2013
8431072 Cast alumina forming austenitic stainless steels Apr. 30, 2013
8430075 Superaustenitic stainless steel and method of making and use thereof Apr. 30, 2013
8318083 Cast heat-resistant austenitic steel with improved temperature creep properties and balanced alloying element additions and methodology for development of the same Nov. 27, 2012
8137613 Austenitic stainless steel welded joint and austenitic stainless steel welding material Mar. 20, 2012
8105447 Austenitic stainless hot-rolled steel material with excellent corrosion resistance, proof stress, and low-temperature toughness Jan. 31, 2012
7847118 Process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated Dec. 7, 2010
7790942 Process for continuous heterogeneously catalyzed partial dehydrogenation of at least one hydrocarbon to be dehydrogenated Sep. 7, 2010
7780798 Medical devices including hardened alloys Aug. 24, 2010
7731895 Austenitic Fe-Ni-Cr alloy Jun. 8, 2010
7488392 Surface on a stainless steel matrix Feb. 10, 2009
7431812 Surface oxidised nickel-iron metal anodes for aluminium production Oct. 7, 2008
7381369 Free cutting alloy Jun. 3, 2008
7101446 Austenitic stainless steel Sep. 5, 2006
6939415 Austenitic stainless steel and manufacturing method thereof Sep. 6, 2005
6926778 Austenitic stainless steel excellent in high temperature strength and corrosion resistance, heat resistant pressurized parts, and the manufacturing method thereof Aug. 9, 2005
6918968 Austenitic stainless steel Jul. 19, 2005
6773660 Ferritic stainless steel for use in high temperature applications Aug. 10, 2004
6652991 Ductile NiAl intermetallic compositions Nov. 25, 2003
6623869 Metal material having good resistance to metal dusting Sep. 23, 2003
6391254 Fe-Cr-Ni alloy for electron gun electrodes May. 21, 2002
6379477 Fe-Cr-Ni alloy for electron gun electrodes and Fe-Cr-Ni alloy sheet for electron gun electrodes Apr. 30, 2002
6355212 Alloy for corrosion-resistant coatings or surface coatings Mar. 12, 2002
6290905 Welding material Sep. 18, 2001
5976275 High-nickel austenitic stainless steel resistant to degradation by neutron irradiation Nov. 2, 1999
5948182 Heat resisting steel Sep. 7, 1999
5882584 Interdental brush wire and interdental brush Mar. 16, 1999
5849420 Punched electron gun part of a Fe-Cr-Ni alloy Dec. 15, 1998
5830408 Stainless steel for high-purity gases Nov. 3, 1998
5824264 High-temperature stainless steel and method for its production Oct. 20, 1998
5820818 Stainless steel having excellent thermal neutron absorption ability Oct. 13, 1998
5749939 Melting of NI laterite in making NI alloyed iron or steel May. 12, 1998
5614149 Stainless steels for coins and method of producing coins of stainless steel Mar. 25, 1997
5556561 Method of forming a weld joint of austenitic stainless steel/ferritic steel Sep. 17, 1996
5539794 Reduction of manganese content of stainless alloys to mitigate corrosion of neighboring in-core zirconium based components Jul. 23, 1996
5529604 Modified stainless steel powder composition Jun. 25, 1996
5496514 Stainless steel sheet and method for producing thereof Mar. 5, 1996
5393487 Steel alloy having improved creep strength Feb. 28, 1995
5340413 Fe-NI based soft magnetic alloys having nanocrystalline structure Aug. 23, 1994
5340534 Corrosion resistant austenitic stainless steel with improved galling resistance Aug. 23, 1994
5338616 Far-infrared emitter of high emissivity and corrosion resistance and method for the preparation thereof Aug. 16, 1994
5292382 Molybdenum-iron thermal sprayable alloy powders Mar. 8, 1994
5203932 Fe-base austenitic steel having single crystalline austenitic phase, method for producing of same and usage of same Apr. 20, 1993
5158624 Soft-magnetic nickel-iron-chromium alloy Oct. 27, 1992
5147475 High strength stainless steel Sep. 15, 1992
5089223 Fe-Cr-Ni-Al ferritic alloys Feb. 18, 1992
5087414 Free machining, mon-magnetic, stainless steel alloy Feb. 11, 1992
5081393 Electron gun having electrodes effective for improving convergence in a color cathode-ray tube Jan. 14, 1992
4999158 Oxidation resistant iron base alloy compositions Mar. 12, 1991

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