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Class Information
Number: 420/67
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Nine percent or more chromium containing > Molybdenum or tungsten containing
Description: Alloy or metallic composition which additionally contains one or more of molybdenum or tungsten.










Sub-classes under this class:

Class Number Class Name Patents
420/68 Titanium, zirconium or hafnium containing 78
420/69 Vanadium, niobium or tantalum containing 124


Patents under this class:
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Patent Number Title Of Patent Date Issued
8663403 High corrosion resistance precipitation hardened martensitic stainless steel Mar. 4, 2014
8313691 Lean austenitic stainless steel Nov. 20, 2012
8158057 Interconnects for solid oxide fuel cells and ferritic stainless steels adapted for use with solid oxide fuel cells Apr. 17, 2012
8062584 Ferritic stainless steel sheet superior in heat resistance Nov. 22, 2011
7985306 High corrosion resistance precipitation hardened martensitic stainless steel Jul. 26, 2011
7914732 Ferritic stainless steel cast iron, cast part using the ferritic stainless steel cast iron, and process for producing the cast part Mar. 29, 2011
7842141 Stainless-steel pipe for oil well and process for producing the same Nov. 30, 2010
7767039 Martensitic stainless steel Aug. 3, 2010
7745029 Ferritic steels for solid oxide fuel cells and other high temperature applications Jun. 29, 2010
7572407 Martensitic stainless steel sheet and method for making the same Aug. 11, 2009
7396420 Hot-dip galvanized hot-rolled and cold-rolled steel sheets excellent in strain age hardening property Jul. 8, 2008
7347903 Duplex stainless steel for urea manufacturing plants Mar. 25, 2008
7341690 Soft Cr-containing steel Mar. 11, 2008
7297214 Free cutting alloy Nov. 20, 2007
7294212 High-strength stainless steel material in the form of a wheel rim and method for manufacturing the same Nov. 13, 2007
7156979 Thermal cracking process using tubes, pipes, and coils made of novel stainless steel matrix Jan. 2, 2007
6974506 Method of manufacturing a ferritic-martensitic, Oxide Dispersion Strengthened alloy Dec. 13, 2005
6881280 Iron-based alloy for internal combustion engine valve seat inserts and the like Apr. 19, 2005
6841122 Hot working die steel excelling in molten corrosion resistance and strength at elevated temperature and member for high temperature use formed of the hot working die steel Jan. 11, 2005
6824672 Use of austenitic stainless steels in applications requiring anti-coking properties Nov. 30, 2004
6793744 Martenstic stainless steel having high mechanical strength and corrosion Sep. 21, 2004
6712912 Welding method, filler metal composition and article made therefrom Mar. 30, 2004
6689231 Use of stainless steel alloy as umbilical tubes in seawater environment Feb. 10, 2004
6582652 Stainless steel alloy having lowered nickel-chromium toxicity and improved biocompatibility Jun. 24, 2003
6562293 Material formulation for galvanizing equipment submerged in molten aluminum and aluminum/zinc melts May. 13, 2003
6551420 Duplex stainless steel Apr. 22, 2003
6485678 Wear-resistant iron base alloys Nov. 26, 2002
6444168 Apparatus comprising furnaces, reactors or conduits used in applications requiring anti-coking properties and novel steel compositions Sep. 3, 2002
6436338 Iron-based alloy for internal combustion engine valve seat inserts Aug. 20, 2002
6375895 Hardfacing alloy, methods, and products Apr. 23, 2002
6303237 Ferritic alloy for constructions Oct. 16, 2001
6290905 Welding material Sep. 18, 2001
6235238 Apparatus comprising furnaces, reactors or conduits having internal walls comprising at least partly of a steel alloy May. 22, 2001
6235237 Steel alloy for gliding elements May. 22, 2001
6123898 Low heat expansion alloy Sep. 26, 2000
6096262 Martensitic heat resisting steel Aug. 1, 2000
6093233 Ferritic stainless steel and external part for a watch made thereof Jul. 25, 2000
6051081 Austenitic-ferritic steel of the superduplex type applicable to the fabrication of seamless tubes Apr. 18, 2000
6048413 Duplex stainless steel with high corrosion resistance Apr. 11, 2000
5985209 Martensitic steel for line pipe having excellent corrosion resistance and weldability Nov. 16, 1999
5944920 Piston ring material excellent in workability Aug. 31, 1999
5942184 Stainless steel for high-purity gases Aug. 24, 1999
5906791 Steel alloys May. 25, 1999
5849111 Duplex stainless steel Dec. 15, 1998
5714115 Austenitic steel alloy Feb. 3, 1998
5702668 Cobalt-free hardfacing alloys with improved welding characteristics Dec. 30, 1997
5582657 Heat-resistant, ferritic cast steel having high castability and exhaust equipment member made thereof Dec. 10, 1996
5545482 Two-phase stainless steel wire rope having high fatigue resistance and corrosion resistance Aug. 13, 1996
5433801 Razor blade steel having high corrosion resistance, razor blades and a process for manufacturing razor blades Jul. 18, 1995
5395583 Stainless steel composition Mar. 7, 1995

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