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Class Information
Number: 420/87
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Over 0.05 percent sulfur, over 0.04 percent phosphorus or sulfur or phosphorus added in any amount to promote machinability
Description: Alloy or metallic composition which contains one or more of more than 0.05 percent sulfur or more than 0.04 percent phosphorus or which contain any amount of sulfur or phosphorus which is positively stated to be present to promote machinability of this alloy or metallic composition.

Sub-classes under this class:

Class Number Class Name Patents
420/88 Processes of making or treating alloy containing over 0.04 percent phosphorus 18

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8691141 Low carbon resulfurized free cutting steel Apr. 8, 2014
8562761 Steel Oct. 22, 2013
8540934 Lead free free-cutting steel and its use Sep. 24, 2013
8529712 Tough iron-based bulk metallic glass alloys Sep. 10, 2013
8518191 Bake-hardenable cold rolled steel sheet with superior strength, galvannealed steel sheet using the cold rolled steel and method for manufacturing the cold rolled steel sheet Aug. 27, 2013
8491731 Alloy composition, Fe-based nano-crystalline alloy and forming method of the same and magnetic component Jul. 23, 2013
8480821 Piston ring material for internal combustion engine Jul. 9, 2013
8475605 Surface layer-hardened steel part and method of manufacturing the same Jul. 2, 2013
8398786 Precipitation hardening cold rolled steel sheet having excellent yield ratios, and the method for manufacturing the same Mar. 19, 2013
8361245 Steel excellent in resistance to sulfuric acid dew point corrosion Jan. 29, 2013
8277579 Amorphous alloy composition Oct. 2, 2012
8182740 High-strength steel sheets excellent in hole-expandability and ductility May. 22, 2012
8158276 FePtP-alloy magnetic thin film Apr. 17, 2012
8137484 Method of production of steel superior in machinability Mar. 20, 2012
8128763 Bake-hardenable cold rolled steel sheet with superior strength, galvannealed steel sheet using the cold rolled steel sheet and method for manufacturing the cold rolled steel sheet Mar. 6, 2012
8124008 Free cutting steel Feb. 28, 2012
8052925 Low carbon resulfurized free-machining steel having high machinability Nov. 8, 2011
8052809 Iron-based brazing foil and method for brazing Nov. 8, 2011
8012272 Tool steels and manufacturing method thereof Sep. 6, 2011
7838763 Manufacturing apparatus and method for large-scale production of thin-film solar cells Nov. 23, 2010
7744703 Fe-based amorphous alloy strip Jun. 29, 2010
7678204 Good-workability and high-strength cold-rolled steel sheet excellent in post-painting corrosion resistance Mar. 16, 2010
7666350 Low carbon composite free-cutting steel product excellent in roughness of finished surface and method for production thereof Feb. 23, 2010
7540927 Soft magnetic steels excellent in cold forgeability, machinability and magnetic properties, and soft magnetic steel parts excellent in magnetic properties Jun. 2, 2009
7488396 Superior in machinability and method of production of same Feb. 10, 2009
7445680 Lead-free steel for machine structural use with excellent machinability and low strength anisotropy Nov. 4, 2008
7387691 Hot forged non-heat treated steel for induction hardening Jun. 17, 2008
7195736 Lead-free steel for machine structural use with excellent machinability and low strength anisotropy Mar. 27, 2007
7014812 Sulfur-containing free-cutting steel for machine structural use Mar. 21, 2006
6942741 Iron alloy strip for voice coil motor magnetic circuits Sep. 13, 2005
6938324 Method of manufacturing a stator core Sep. 6, 2005
6858101 Steel excellent in forgeability and machinability Feb. 22, 2005
6838048 Steel for machine structural use and method of producing same Jan. 4, 2005
6797231 Steel for machine structural use Sep. 28, 2004
6783728 Free-cutting steel for machine structural use having good machinability in cutting by cemented carbide tool Aug. 31, 2004
6773661 Free-cutting steel Aug. 10, 2004
6761853 Free-cutting tool steel Jul. 13, 2004
6743304 Non-oriented electrical steel sheet with ultra-high magnetic flux density and production method thereof Jun. 1, 2004
6737019 Sulfur-containing free-cutting steel May. 18, 2004
6667005 Corrosion resistant steel Dec. 23, 2003
6663726 High-hardness prehardened steel for cold working with excellent machinability, die made of the same for cold working, and method of working the same Dec. 16, 2003
6649125 Free-cutting steel Nov. 18, 2003
6635129 Wire rod steel Oct. 21, 2003
6599469 Non-heat treated steel for soft nitriding Jul. 29, 2003
6596227 Machine structure steel superior in chip disposability and mechanical properties and its method of making Jul. 22, 2003
6475305 Machine structural steel product Nov. 5, 2002
6299833 Steel composition Oct. 9, 2001
6293988 Inoculant and inoculant method for gray and ductile cast irons Sep. 25, 2001
6287397 High strength phosphorus-containing steel and method for producing the same Sep. 11, 2001
6210496 High-strength high-workability cold rolled steel sheet having excellent impact resistance Apr. 3, 2001

1 2 3

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