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Class Information
Number: 420/84
Name: Alloys or metallic compositions > Ferrous (i.e., iron base) > Lead, bismuth, selenium, tellurium or calcium containing
Description: Alloy or metallic composition which additionally contains one or more of lead, bismuth, selenium, tellurium or calcium.










Sub-classes under this class:

Class Number Class Name Patents
420/85 Processes 27


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8702880 High strength and low yield ratio steel for structure having excellent low temperature toughness Apr. 22, 2014
8657969 High-strength galvanized steel sheet with excellent formability and method for manufacturing the same Feb. 25, 2014
8647564 High-strength steel sheet with excellent low temperature toughness and manufacturing thereof Feb. 11, 2014
8617462 Steel for oil well pipe excellent in sulfide stress cracking resistance Dec. 31, 2013
8535459 Steel material for hardening Sep. 17, 2013
8506727 Piston rings Aug. 13, 2013
8475605 Surface layer-hardened steel part and method of manufacturing the same Jul. 2, 2013
8404178 High-strength pearlitic steel rail having excellent delayed fracture properties Mar. 26, 2013
8361382 High-strength pearlitic steel rail having excellent delayed fracture properties Jan. 29, 2013
8298355 Magnetic alloy, amorphous alloy ribbon, and magnetic part Oct. 30, 2012
8293379 Quenchable steel sheet having high hot press workability and method of manufacturing the same Oct. 23, 2012
8273292 Steel for machine and structural use having excellent machinability Sep. 25, 2012
8187530 Steel for high-cleanliness spring with excellent fatigue characteristics and high-cleanliness spring May. 29, 2012
8182740 High-strength steel sheets excellent in hole-expandability and ductility May. 22, 2012
8124008 Free cutting steel Feb. 28, 2012
8038934 High-strength spring steel excellent in brittle fracture resistance and method for producing same Oct. 18, 2011
8012272 Tool steels and manufacturing method thereof Sep. 6, 2011
7887924 High-strength steel with excellent unsusceptibility to hydrogen embrittlement Feb. 15, 2011
7879287 Hot-rolled steel sheet for high-strength electric-resistance welded pipe having sour-gas resistance and excellent weld toughness, and method for manufacturing the same Feb. 1, 2011
7670547 Low alloy steel for oil country tubular goods having high sulfide stress cracking resistance Mar. 2, 2010
7648587 Steel product for use as line pipe having high HIC resistance and line pipe produced using such steel product Jan. 19, 2010
7635406 Method for manufacturing a low alloy steel excellent in corrosion resistance Dec. 22, 2009
7597841 Weld metal excellent in toughness and SR cracking resistance Oct. 6, 2009
7387691 Hot forged non-heat treated steel for induction hardening Jun. 17, 2008
7338630 Free-cutting steel and fuel injection system component using the same Mar. 4, 2008
7264684 Steel for steel pipes Sep. 4, 2007
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
6841123 Rust-resistant calcium steel Jan. 11, 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
6667005 Corrosion resistant steel Dec. 23, 2003
6649125 Free-cutting steel Nov. 18, 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
6558483 Cu precipitation strengthened steel May. 6, 2003
6511553 Steel for steel excellent in workability and method of deoxidizing same Jan. 28, 2003
6475305 Machine structural steel product Nov. 5, 2002
6464935 Steel for shaft Oct. 15, 2002
6355212 Alloy for corrosion-resistant coatings or surface coatings Mar. 12, 2002
6344093 High tensile strength steel product for high heat input welding, having excellent toughness in heat-affected zone Feb. 5, 2002
6299833 Steel composition Oct. 9, 2001
6210496 High-strength high-workability cold rolled steel sheet having excellent impact resistance Apr. 3, 2001
6200527 Carbon or low-alloy steel with improved machinability and process of manufacture of that steel Mar. 13, 2001
6162389 High-strength and high-toughness non heat-treated steel having excellent machinability Dec. 19, 2000
6149862 Iron-silicon alloy and alloy product, exhibiting improved resistance to hydrogen embrittlement and method of making the same Nov. 21, 2000
6143242 Steel for machine structural use excellent in fracture splitability and fatigue strength Nov. 7, 2000

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