ClassID:

119144

C21D2211/003 - CPC Classification

Classification description:

Microstructure comprising significant phases Cementite

Recent Application in this class:
#1
20260097428
2026-04-09

COLD ROLLED STEEL SHEET FOR HOT-PRESS FORMING HAVING EXCELLENT SURFACE QUALITY, HOT-PRESS-FORMED MEMBER, AND METHOD FOR MANUFACTURING SAME

#2
20260043104
2026-02-12

COLD-ROLLED STEEL PLATE FOR HOT FORMING, HAVING EXCELLENT CORROSION-RESISTANCE AND SPOT-WELDABILITY, HOT-FORMED MEMBER, AND METHOD FOR MANUFACTURING SAME

#3
20260028705
2026-01-29

HOT-ROLLED HIGH-STRENGTH STEEL STRIP

#4
20260022431
2026-01-22

Manufacturing Method of Alloy Steel For Cold-Forging, Alloy Steel For Cold-Forging, and Gear For Cold-Forging

#5
20250340965
2025-11-06

Steel sheet for manufacturing press hardened parts, press hardened part having a combination of high strength and crash ductility, and manufacturing methods thereof

#6
20250327156
2025-10-23

HIGH-STRENGTH PETROLEUM PIPE CASING AND MANUFACTURING METHOD THEREFOR

#7
20250243575
2025-07-31

High toughness press-hardened steel part and method of manufacturing the same

#8
20250243573
2025-07-31

High toughness press-hardened steel part and method of manufacturing the same

#9
20250230533
2025-07-17

LOW TEMPERATURE HARDENABLE STEELS WITH EXCELLENT MACHINABILITY

#10
20250122592
2025-04-17

COLD-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING SAME

#11
20250101540
2025-03-27

TIN PLATE AND MANUFACTURING METHOD THEREFOR

#12
20250059634
2025-02-20

GREY CAST IRON, IN PARTICULAR FOR DISC BRAKE COMPONENTS

#13
20250043380
2025-02-06

COLD-ROLLED STEEL SHEET AND METHOD OF MANUFACTURING COLD-ROLLED STEEL SHEET

#14
20250011907
2025-01-09

METHOD OF PRODUCING A STEEL SHEET FOR CANS

#15
20240337000
2024-10-10

Method for Producing a Cold-Rolled Flat Steel Product Having a Bainitic Basic Structure and Cold-Rolled Flat Steel Product Having a Bainitic Basic Structure

#16
20240327962
2024-10-03

HOT DIP GALVANIZED STEEL SHEET AND METHOD FOR PRODUCING SAME

#17
20240301527
2024-09-12

COLD-ROLLED STEEL PLATE FOR HOT FORMING, HAVING EXCELLENT CORROSION-RESISTANCE AND SPOT-WELDABILITY, HOT-FORMED MEMBER, AND METHOD FOR MANUFACTURING SAME

#18
20240295000
2024-09-05

HIGH STRENGTH COATED DUAL PHASE STEEL STRIP AND METHOD TO PRODUCE IT

#19
20240254588
2024-08-01

WIRE ROD HAVING EXCELLENT DRAWABILITY, AND MANUFACTURING METHOD THEREFOR

#20
20240254577
2024-08-01

SPHEROIDIZING-ANNEALED STEEL FOR BALL SCREW HAVING HIGH STRENGTH AND RESISTANCE TO LOW TEMPERATURES AND MANUFACTURING METHOD THEREOF

#21
20240182997
2024-06-06

HOT DIP GALVANIZED STEEL SHEET AND METHOD FOR PRODUCING SAME

#22
20240175112
2024-05-30

STEEL WIRE FOR MACHINE STRUCTURAL PARTS AND METHOD FOR MANUFACTURING THE SAME

#23
20240117459
2024-04-11

STEEL WIRE WITH IMPROVED DRAWABILITY, AND MANUFACTURING METHOD THEREFOR

#24
20240076766
2024-03-07

QT HEAT TREATED HIGH CARBON HOT ROLLED STEEL SHEET, HIGH CARBON COLD ROLLED STEEL SHEET, QT HEAT TREATED HIGH CARBON COLD ROLLED STEEL SHEET, AND MANUFACTURING METHODS THEREOF

#25
20240043955
2024-02-08

STEEL SHEET WITH EXCELLENT PHOSPHATABILITY AND MANUFACTURING METHOD THEREFOR

#26
20240035515
2024-02-01

BEARING PART AND ROLLING BEARING

#27
20240011115
2024-01-11

STEEL SHEET FOR ENAMEL AND METHOD OF MANUFACTURING THE SAME

#28
20230416864
2023-12-28

HIGH STRENGTH AND HIGH FORMABILITY STEEL SHEET AND MANUFACTURING METHOD

#29
20230416863
2023-12-28

Cold-rolled steel plate for hot forming, having excellent corrosion-resistance and spot-weldability, hot-formed member, and method for manufacturing same

#30
20230399712
2023-12-14

Steel sheet and method for producing same

#31
20230357874
2023-11-09

HIGH-STRENGTH COLD-ROLLED STEEL SHEET, HOT-DIPPED GALVANIZED STEEL SHEET, ALLOYED HOT-DIPPED GALVANIZED STEEL SHEET, AND METHODS FOR PRODUCING OF THESE

#32
20230349019
2023-11-02

STEEL SHEET, MEMBER, AND METHODS FOR MANUFACTURING THE SAME

#33
20230340633
2023-10-26

METHOD OF MANUFACUTRING A HIGH-STRENGTH COLD ROLLED STEEL SHEET HAVING HIGH HOLE EXPANSION RATIO, AND HIGHSTRENGTH HOT-DIP GALVANIZED STEEL SHEET

#34
20230295784
2023-09-21

HIGH-STRENGTH AND HIGH-FATIGUE-LIFE STEEL FOR CABLE, AND WIRE ROD AND PREPARATION METHOD THEREFOR

#35
20230295762
2023-09-21

HOT-PRESSED MEMBER AND METHOD FOR PRODUCING THE SAME

#36
20230295761
2023-09-21

STEEL SHEET AND STEEL SHEET MANUFACTURING METHOD

#37
20230235423
2023-07-27

Cold-rolled steel plate for hot forming, having excellent corrosion-resistance and spot-weldability, hot-formed member, and method for manufacturing same

#38
20230203617
2023-06-29

Steel sheet for manufacturing press hardened parts, press hardened part having a combination of high strength and crash ductility, and manufacturing methods thereof

#39
20230203616
2023-06-29

Steel sheet for manufacturing press hardened parts, press hardened part having a combination of high strength and crash ductility, and manufacturing methods thereof

#40
20230160033
2023-05-25

Galvannealed steel sheet coated with an iron and nickel layer topped by a zinc-based layer

#41
20230151452
2023-05-18

Steel sheet having excellent toughness, ductility and strength, and manufacturing method thereof

#42
20230114417
2023-04-13

STEEL FOR GLASS LINING AND PRODUCTION METHOD THEREFOR

#43
20230101304
2023-03-30

Low temperature hardenable steels with excellent machinability

#44
20230097055
2023-03-30

HOT-ROLLED STEEL SHEET AND MANUFACTURING METHOD THEREOF

#45
20230072557
2023-03-09

STEEL SHEET, MEMBER, AND METHODS FOR MANUFACTURING THE SAME

#46
20230020054
2023-01-19

BEARING WIRE ROD AND MANUFACTURING METHOD THEREFOR

#47
20220389533
2022-12-08

Cold-rolled steel plate for hot forming, having excellent corrosion-resistance and spot-weldability, hot-formed member, and method for manufacturing same

#48
20220349019
2022-11-03

High-strength steel sheet and manufacturing method thereof

#49
20220251691
2022-08-11

CAST IRON, IN PARTICULAR FOR COMPONENTS OF DISC BRAKES

#50
20220170126
2022-06-02

HIGH-CARBON HOT-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

#51
20220154320
2022-05-19

MOLTEN Zn-Al-Mg-PLATED STEEL SHEET AND METHOD FOR PRODUCING SAME

#52
20220154302
2022-05-19

Steel sheet and production method for same

#53
20220145415
2022-05-12

Cold rolled steel sheet and method for producing same

#54
20220127709
2022-04-28

Hot dip galvanized steel sheet and method for producing same

#55
20220119912
2022-04-21

Method for optimizing microstructure of rail welded joint

#56
20220119908
2022-04-21

Hot dip galvanized steel sheet and method for producing same

#57
20220106663
2022-04-07

High-carbon hot-rolled steel sheet and method for manufacturing the same

#58
20220090248
2022-03-24

Hot dip galvanized steel sheet and method for producing same

#59
20220074031
2022-03-10

Steel sheet for cans and method of producing same

#60
20220064771
2022-03-03

Hot dip galvanized steel sheet and method for producing same

#61
20220033926
2022-02-03

High-strength cold rolled steel sheet having high hole expansion ratio, highstrength hot-dip galvanized steel sheet, and manufacturing methods therefor

#62
20220032681
2022-02-03

Railway wheel

#63
20220025493
2022-01-27

STEEL MATERIAL

#64
20220002847
2022-01-06

MEDIUM MANGANESE COLD-ROLLED STEEL INTERMEDIATE PRODUCT HAVING A REDUCED CARBON CONTENT, AND METHOD FOR PROVIDING SUCH A STEEL INTERMEDIATE PRODUCT

#65
20210395868
2021-12-23

HOT-ROLLED WIRE ROD

#66
20210277505
2021-09-09

Packaging sheet metal product

#67
20210123122
2021-04-29

Steel sheet and manufacturing method of therefor

#68
20210115544
2021-04-22

Steel sheet for hot stamping use

#69
20210108282
2021-04-15

High-strength steel sheet and production method thereof

#70
20210095356
2021-04-01

Steel sheet and manufacturing method therefor

#71
20210095355
2021-04-01

High carbon steel track bushing

#72
20210087646
2021-03-25

High strength and high formability steel sheet and manufacturing method

#73
20210079491
2021-03-18

Wire rod for cold heading, processed product using same, and manufacturing method therefor

#74
20210054477
2021-02-25

High-carbon hot-rolled steel sheet and method for producing the same

#75
20210032737
2021-02-04

Machine component

#76
20210017620
2021-01-21

Steel sheet and manufacturing method therefor

#77
20200392600
2020-12-17

High-carbon cold rolled steel sheet and method for manufacturing same

#78
20200385833
2020-12-10

Cold-rolled steel plate for hot forming, having excellent corrosion-resistance and spot-weldability, hot-formed member, and method for manufacturing same

#79
20200362432
2020-11-19

Steel sheet having excellent toughness, ductility and strength, and manufacturing method thereof

#80
20200318224
2020-10-08

High-strength high-elongation tinned primary plate and double cold reduction method therefor

#81
20200299801
2020-09-24

Hot-press forming part and method of manufacturing same

#82
20200291496
2020-09-17

Extremely high conductivity low cost steel

#83
20200291495
2020-09-17

Use of a Q and P steel for producing a shaped component for high-wear applications

#84
20200283868
2020-09-10

Method for the manufacture of a galvannealed steel sheet

#85
20200255915
2020-08-13

High-strength multiphase tinned steel raw plate and manufacturing method therefor

#86
20200165710
2020-05-28

Steel with high hardness and excellent toughness

#87
20200149129
2020-05-14

Steel sheet for manufacturing press hardened parts, press hardened part having a combination of high strength and crash ductility, and manufacturing methods thereof

#88
20200149127
2020-05-14

Cold rolled steel sheet for flux-cored wire, and manufacturing method therefor

#89
20200123625
2020-04-23

STEEL WIRE ROD, STEEL WIRE, AND PART

#90
20200071791
2020-03-05

WIRE ROD

#91
20200070569
2020-03-05

Railway wheel

#92
20200048731
2020-02-13

STEEL WIRE ROD AND MANUFACTURING METHOD OF STEEL WIRE ROD

#93
20190368002
2019-12-05

STEEL SHEET AND PROCESS FOR PRODUCING SAME

#94
20190352739
2019-11-21

Method of dynamical adjustment for manufacturing a thermally treated steel sheet

#95
20190345577
2019-11-14

High-strength cold-rolled steel sheet and method of producing the same

#96
20190338384
2019-11-07

Hot rolled flat steel product consisting of a complex-phase steel with a largely bainitic microstructure and method for manufacturing such a flat steel product

#97
20190316238
2019-10-17

STEEL WIRE AND COATED STEEL WIRE

#98
20190309396
2019-10-10

High-strength steel sheet and method of manufacturing the same

#99
20190249268
2019-08-15

Steel sheet for hot press and method of manufacturing same, and hot-press forming part and method of manufacturing same

#100
20190226040
2019-07-25

HYPEREUTECTOID RAIL AND MANUFACTURING METHOD THEREOF

#101
20190169707
2019-06-06

Hot-pressed steel sheet member, method of manufacturing the same, and steel sheet for hot pressing

#102
20190105694
2019-04-11

HIGH-CARBON AND HIGH-STRENGTH AND TOUGHNESS PEARLITIC RAIL AND MANUFACTURING METHOD THEREOF

#103
20190105693
2019-04-11

High-toughness and plasticity hypereutectoid rail and manufacturing method thereof

#104
20190032176
2019-01-31

Cast steel projection material

#105
20190003009
2019-01-03

High-strength steel sheet and high-strength galvanized steel sheet

#106
20180327889
2018-11-15

Steel wire rod for wire drawing

#107
20180298459
2018-10-18

ONLINE-CONTROL COOLING PROCESS FOR SEAMLESS STEEL TUBE FOR EFFECTIVELY REFINING GRAINS AND THE METHOD FOR MANUFACTURING THEREOF

#108
20180282833
2018-10-04

Method for manufacturing bainite high-strength seamless steel tube, and bainite high-strength seamless steel tube

#109
20180274054
2018-09-27

Seamless steel tube with high strength and toughness and manufacturing method therefor

#110
20180265941
2018-09-20

Process for on-line quenching of seamless steel tube using residual heat and manufacturing method

#111
20180245176
2018-08-30

600 MPa yield strength-graded, high-stretchability hot-dip aluminum-zinc and color-coated steel plate and manufacturing method therefor

#112
20180245175
2018-08-30

500 MPA yield strength-graded, high-stretchability hot-dip aluminum-zinc and color-coated steel plate and manufacturing method therefore

#113
20180105894
2018-04-19

STEEL WIRE FOR MECHANICAL STRUCTURAL PARTS

#114
20180100215
2018-04-12

Drawing process and wire obtained by drawing process

#115
20180087125
2018-03-29

HIGH-CARBON STEEL WIRE MATERIAL WITH EXCELLENT WIRE DRAWABILITY, AND STEEL WIRE

#116
20180073115
2018-03-15

Hot-rolled steel sheet, steel material, and method for producing hot-rolled steel sheet

#117
20180002778
2018-01-04

High-strength steel sheet and method for manufacturing the same

#118
20170362689
2017-12-21

Ultrahigh-strength spring steel

#119
20170298462
2017-10-19

Method For Producing A Structural Component Including A Thermomagnetic Tempering Process Yielding Localized Soft Zones

#120
20170283957
2017-10-05

Steel for carburizing, carburized steel component, and method of producing the same

#121
20170282501
2017-10-05

Steel for carburizing, carburized steel component, and method of producing the same

#122
20170268083
2017-09-21

High-strength steel for steel forgings, and steel forging

#123
20170130306
2017-05-11

Free-machining powder metallurgy steel articles and method of making same

#124
20170121787
2017-05-04

HIGH-CARBON HOT-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

#125
20170121786
2017-05-04

High-carbon hot-rolled steel sheet and method for manufacturing the same

#126
20170114434
2017-04-27

Steel for cold forging

#127
20170114425
2017-04-27

Steel plate having excellent acid dew point corrosion resistance, method of production, and exhaust gas channel constituent member

#128
20170101696
2017-04-13

Excellent workability steel wire rod and method for production of same

#129
20170096719
2017-04-06

EXTREMELY HIGH CONDUCTIVITY LOW COST STEEL

#130
20170081746
2017-03-23

Low-alloy steel pipe for an oil well

#131
20170051372
2017-02-23

Method for manufacturing hot stamped body having vertical wall and hot stamped body having vertical wall

#132
20170044642
2017-02-16

Filament for high strength steel cord

#133
20170037491
2017-02-09

Wire rod for high strength steel cord

#134
20170016087
2017-01-19

High formability dual phase steel

#135
20170009314
2017-01-12

Piston ring and its production method

#136
20160369369
2016-12-22

High-strength cold-rolled steel sheet and method for manufacturing the same (as amended)

#137
20160333438
2016-11-17

Bearing part

#138
20160333437
2016-11-17

BEARING PART, STEEL FOR BEARING PART AND METHOD FOR PRODUCING THEREOF

#139
20160312325
2016-10-27

Hot-pressed steel sheet member, method of manufacturing the same, and steel sheet for hot pressing

#140
20160298207
2016-10-13

Bake-hardening galvanized steel sheet

#141
20160289787
2016-10-06

High-carbon steel sheet and method of manufacturing the same

#142
20160265077
2016-09-15

Method of producing roughly shaped material for rolling bearing

#143
20160258032
2016-09-08

High-strength hot-rolled steel sheet and method for producing the same

#144
20160186300
2016-06-30

Rolled round steel material for steering rack bar, and steering rack bar

#145
20160145710
2016-05-26

High-carbon hot-rolled steel sheet and method for manufacturing the same

#146
20160145709
2016-05-26

High-carbon hot-rolled steel sheet and method for producing the same

#147
20160083823
2016-03-24

Rolled round steel material for steering rack bar and steering rack bar

#148
20150259771
2015-09-17

High strength low alloy steel and method of manufacturing

#149
20150232968
2015-08-20

Method for heat treatment of hypereutectoid steel rail

#150
20150140358
2015-05-21

Hot-dip galvannealed hot-rolled steel sheet and process for producing same

#151
20150118098
2015-04-30

Low temperature hardenable steels with excellent machinability

#152
20150090376
2015-04-02

High carbon hot rolled steel sheet and method for manufacturing the same

#153
20150086411
2015-03-26

Heat-resistant bearing material made of an austenitic iron matrix alloy

#154
20150047751
2015-02-19

High strength steel sheet and method of manufacturing the same

#155
20150044502
2015-02-12

Hot-dip galvanized steel sheet for stamping having excellent cold workability, die hardenability, and surface quality, and producing method thereof

#156
20150004433
2015-01-01

Steel sheet, plated steel sheet, and method for producing the same

#157
20150000801
2015-01-01

High-carbon hot rolled steel sheet with excellent hardenability and small in-plane anistropy and method for manufacturing the same

#158
20140352852
2014-12-04

HOT ROLLED HIGH TENSILE STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING SAME

#159
20140238557
2014-08-28

Method for producing cold-rolled steel sheet

#160
20140230970
2014-08-21

Hot-rolled steel sheet and associated production method

#161
20140117626
2014-05-01

Compression ring and its production method

#162
20140069556
2014-03-13

High carbon thin steel sheet and method for producing same

#163
20140014237
2014-01-16

Hot-rolled steel sheet and method of producing the same

#164
20140000766
2014-01-02

Hot-rolled steel sheet with excellent press formability and production method thereof

#165
20130330119
2013-12-12

Forged steel and welded structure for components for nuclear power plants

#166
20130213534
2013-08-22

Heat-treated steel material, method for producing same, and base steel material for same

#167
20130199678
2013-08-08

High strength hot-rolled steel sheet and method for manufacturing the same

#168
20130183191
2013-07-18

Bearing steel

#169
20130146181
2013-06-13

Steel for carburizing, carburized steel component, and method of producing the same

#170
20130146180
2013-06-13

Steel for carburizing, carburized steel component, and method of producing the same

#171
20130065079
2013-03-14

Steel rail and method of manufacturing the same

#172
20130048159
2013-02-28

High-strength and high-toughness ultrafine wire rod

#173
20130014863
2013-01-17

METHOD OF MAGNETICALLY PROCESSING AN IRON-CARBON ALLOY

#174
20130000791
2013-01-03

High-strength hot-rolled steel sheet and method of manufacturing the same

#175
20120325364
2012-12-27

SEAMLESS STEEL PIPE FOR HIGH-STRENGTH HOLLOW SPRING

#176
20120222786
2012-09-06

Manufacturing method of carbon steel sheet superior in formability

#177
20120014831
2012-01-19

Wire rod, steel wire, and manufacturing method thereof

#178
20120012231
2012-01-19

Cold-rolled steel sheet and method for producing the same

#179
20110318217
2011-12-29

COLD-ROLLED STEEL SHEET WITH EXCELLENT BENDING WORKABILITY, METHOD FOR MANUFACTURING THE SAME, AND MEMBER USING THE SAME

#180
20110168304
2011-07-14

Method for manufacturing high strength steel plate

#181
20110158572
2011-06-30

Method for manufacturing a steel component, a weld seam, a welded steel component, and a bearing component

#182
20110041965
2011-02-24

High strength thick-gauge steel plate superior in weldability and having tensile strength of 780 MPA or more and method of production of same

#183
20100258217
2010-10-14

Nanocarbide precipitation strengthened ultrahigh-strength, corrosion resistant, structural steels

#184
20100252147
2010-10-07

High-strength cold-rolled steel sheet

#185
20100218859
2010-09-02

HIGH CARBON STEEL SHEET SUPERIOR IN FATIUGUE LIFEAND MANUFACTURING METHOD THEREOF

#186
20100108201
2010-05-06

High-strength hot rolled steel sheet being free from peeling and excellent in surface properties and burring properties, and method for manufacturing the same

#187
20100084051
2010-04-08

Method for manufacturing carburized part, and steel part

#188
20100051143
2010-03-04

Case Hardening Steel Tube Having Improved Workability and a Process for its Manufacture

#189
20090095383
2009-04-16

Fine grain surface layer steel part and method of production of same

#190
20080295923
2008-12-04

Manufacturing method of carbon steel sheet superior in formability

#191
20080202652
2008-08-28

Ferrous seal sliding parts and producing method thereof

#192
20080156399
2008-07-03

High-Concentration Carburized/Low-Strain Quenched Member and Process for Producing the Same

#193
20080149229
2008-06-26

Rolling member and producing method thereof

#194
20080060727
2008-03-13

Ferrous seal sliding parts and producing method thereof

#195
20070122251
2007-05-31

Cold-rolled fixing screw comprising a self-tapping thread

#196
20070095443
2007-05-03

Wear resistant cast iron

#197
20070012386
2007-01-18

High strength steel plate

#198
20060137781
2006-06-29

High-strength four-phase steel alloys

#199
20060021679
2006-02-02

Rolling element and method of producing the same

#200
20050257860
2005-11-24

Rolling member and producing method thereof

#201
20050189045
2005-09-01

Ferrous seal sliding parts and producing method thereof

#202
20050183800
2005-08-25

Kick-down drum material and method of manufacturing the same

#203
20050106411
2005-05-19

High strength steel plate and method for production thereof

#204
20050103408
2005-05-19

Nanocarbide precipitation strengthened ultrahigh-strength, corrosion resistant, structural steels

#205
20050078901
2005-04-14

Bearing device and method of manufacturing the bearing device