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Class Information
Number: 420/50
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Nine percent or more chromium containing > Eight percent or more nickel containing > Over 1.5 percent silicon containing
Description: Alloy or metallic composition which additionally contains more than 1.5 percent silicon.










Sub-classes under this class:

Class Number Class Name Patents
420/51 Group iv or v transition metal containing 36


Patents under this class:
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Patent Number Title Of Patent Date Issued
8647448 Nitratable steel piston rings and steel cylindrical sleeves, and casting method for the production thereof Feb. 11, 2014
8486204 Hinge device and electronic device using the same Jul. 16, 2013
8287805 Brazing material Oct. 16, 2012
7455811 Brazing material and brazed products manufactured therewith Nov. 25, 2008
7101446 Austenitic stainless steel Sep. 5, 2006
6883701 Iron-chromium base brazing filler metals Apr. 26, 2005
6773660 Ferritic stainless steel for use in high temperature applications Aug. 10, 2004
6355212 Alloy for corrosion-resistant coatings or surface coatings Mar. 12, 2002
6060180 Alloy having high corrosion resistance in environment of high corrosiveness, steel pipe of the same alloy and method of manufacturing the same steel pipe May. 9, 2000
6036917 Corrosion resistant austenitic stainless steel Mar. 14, 2000
5944917 Stainless steel for ozone added water and manufacturing method thereof Aug. 31, 1999
5749939 Melting of NI laterite in making NI alloyed iron or steel May. 12, 1998
5693155 Process for using anti-coking steels for diminishing coking in a petrochemical process Dec. 2, 1997
5569334 Stainless steel member for semiconductor fabrication equipment and surface treatment method therefor Oct. 29, 1996
5565167 Stainless steel excellent in fused-salt corrosion resistance and method of producing the same Oct. 15, 1996
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
5320801 High carbon high chromium alloys having corrosion and abrasion resistance Jun. 14, 1994
5316721 Heat-resistant alloy having high creep rupture strength under high-temperature low-stress conditions and excellent resistance to carburization May. 31, 1994
5306464 Abrasion, erosion and corrosion resistant alloy Apr. 26, 1994
5296054 Austenitic steel Mar. 22, 1994
5252148 Soft magnetic alloy, method for making, magnetic core, magnetic shield and compressed powder core using the same Oct. 12, 1993
5244513 Fe-Cr-Ni-Si shape memory alloys with excellent stress corrosion cracking resistance Sep. 14, 1993
5151248 Pd-added austenitic stainless steel for use for high temperature concentrated sulfuric acid Sep. 29, 1992
5147475 High strength stainless steel Sep. 15, 1992
5120496 Stainless wrought and cast materials and welding additives for structural units exposed to hot, concentrated sulfuric acid Jun. 9, 1992
5051233 Stainless wrought and cast materials and welding additives for structural units exposed to hot, concentrated sulfuric acid Sep. 24, 1991
5028396 Apparatus formed of high silicon chromium/nickel in steel in the manufacture of sulpheric acid Jul. 2, 1991
4999158 Oxidation resistant iron base alloy compositions Mar. 12, 1991
4999159 Heat-resistant austenitic stainless steel Mar. 12, 1991
4933027 Iron-based shape-memory alloy excellent in shape-memory property, corrosion resistance and high-temperature oxidation resistance Jun. 12, 1990
4933143 Austenitic stainless steel having improved corrosion resistance in hot water Jun. 12, 1990
4929289 Iron-based shape-memory alloy excellent in shape-memory property and corrosion resistance May. 29, 1990
4917860 Corrosion resistant alloy Apr. 17, 1990
4826655 Cast high silicon heat resistant alloys May. 2, 1989
4802894 Method of using a structural member of anti-sulfur-attack cr-ni-al-si alloy steel for coal gasification system Feb. 7, 1989
4784705 Wrought high silicon heat resistant alloys Nov. 15, 1988
4690711 Sintered compact and process for producing same Sep. 1, 1987
4671929 Austenitic stainless steel with improved resistance to corrosion by nitric acid Jun. 9, 1987
4653684 Welding material for austenite stainless steel having high Si content and method of application Mar. 31, 1987
4640817 Dual-phase stainless steel with improved resistance to corrosion by nitric acid Feb. 3, 1987
4610437 Crucible for holding salt baths for the boriding of steels Sep. 9, 1986
4543244 Use of high silicon Cr Ni steel in H.sub.2 SO.sub.4 manufacture Sep. 24, 1985
4516716 Method of brazing with iron-based and hard surfacing alloys May. 14, 1985
4505232 Boiler tube Mar. 19, 1985
4468250 Welding additive material substantially free of cobalt and carbide for deposit welding Aug. 28, 1984
4444731 Tube for thermal cracking or reforming hydrocarbon Apr. 24, 1984
4444587 Brazing alloy Apr. 24, 1984
4410604 Iron-based brazing alloy compositions and brazed assemblies with iron based brazing alloys Oct. 18, 1983

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