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Class Information
Number: 420/44
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Nine percent or more chromium containing > Eight percent or more nickel containing > Over 2 percent manganese containing
Description: Alloy or metallic composition which additionally contains more than 2 percent of manganese.

Sub-classes under this class:

Class Number Class Name Patents
420/45 Copper containing 35
420/48 Group iv or v transition metal containing 31
420/46 Molybdenum or tungsten containing 51

Patents under this class:

Patent Number Title Of Patent Date Issued
8486204 Hinge device and electronic device using the same Jul. 16, 2013
8431072 Cast alumina forming austenitic stainless steels Apr. 30, 2013
8158274 Welding material and welded joint structure Apr. 17, 2012
7951469 Welding material and welded joint structure May. 31, 2011
RE41504 Heat and corrosion resistant cast CF8C stainless steel with improved high temperature strength and ductility Aug. 17, 2010
7749431 Stainless steel for high-pressure hydrogen gas Jul. 6, 2010
RE41100 Heat and corrosion resistant cast CN-12 type stainless steel with improved high temperature strength and ductility Feb. 9, 2010
7575712 Ferromagnetic alloy for induction cooking Aug. 18, 2009
7531129 Stainless steel for high-pressure hydrogen gas May. 12, 2009
7255755 Heat and corrosion resistant cast CN-12 type stainless steel with improved high temperature strength and ductility Aug. 14, 2007
7153373 Heat and corrosion resistant cast CF8C stainless steel with improved high temperature strength and ductility Dec. 26, 2006
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
6918967 Corrosion resistant austenitic alloy Jul. 19, 2005
6379477 Fe-Cr-Ni alloy for electron gun electrodes and Fe-Cr-Ni alloy sheet for electron gun electrodes Apr. 30, 2002
5849420 Punched electron gun part of a Fe-Cr-Ni alloy Dec. 15, 1998
5583900 Structural member having superior resistance to neutron irradiation embrittlement, austenitic steel for use in same, and use thereof Dec. 10, 1996
5569334 Stainless steel member for semiconductor fabrication equipment and surface treatment method therefor Oct. 29, 1996
5340534 Corrosion resistant austenitic stainless steel with improved galling resistance Aug. 23, 1994
5147475 High strength stainless steel Sep. 15, 1992
5116569 Austenitic steel excellent in resistance to neutron irradiation embrittlement and members made of the steel May. 26, 1992
5021215 High-strength, heat-resistant steel with improved formability and method thereof Jun. 4, 1991
4933027 Iron-based shape-memory alloy excellent in shape-memory property, corrosion resistance and high-temperature oxidation resistance Jun. 12, 1990
4818484 Austenitic, non-magnetic, stainless steel alloy Apr. 4, 1989
4675156 Structural austenitic stainless steel with superior proof stress and toughness at cryogenic temperatures Jun. 23, 1987
4671929 Austenitic stainless steel with improved resistance to corrosion by nitric acid Jun. 9, 1987
4586957 Iron-base alloy materials having excellent workability May. 6, 1986
4484958 Non-magnetic alloy having high hardness and good weldability Nov. 27, 1984
4462957 Sliding mechanism Jul. 31, 1984
4444587 Brazing alloy Apr. 24, 1984
4337088 Non-magnetic stabilizer Jun. 29, 1982
4285725 Non-magnetizable steel casting alloy, its use and process of manufacture Aug. 25, 1981
4279648 High silicon chromium nickel steel for strong nitric acid Jul. 21, 1981
4220689 Galling resistant austenitic stainless steel powder product Sep. 2, 1980
4146412 Galling resistant austenitic stainless steel Mar. 27, 1979
4099967 Galling resistant austenitic stainless steel Jul. 11, 1978
4086107 Heat treatment process of high-carbon chromium-nickel heat-resistant stainless steels Apr. 25, 1978
4086085 Austenitic iron alloys Apr. 25, 1978
4060429 Manganese-nickel alloys Nov. 29, 1977
4032367 Corrosion resistant steels Jun. 28, 1977

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