ClassID:

119072

C21D9/0081 - CPC Classification

Classification description:

Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets

Recent Application in this class:
#1
20260117351
2026-04-30

STEEL SHEETS AND METHOD FOR MANUFACTURING SAME

#2
20260049371
2026-02-19

Steel having improved processing properties for working at elevated temperatures

#3
20260035773
2026-02-05

ECONOMICAL HYDRIGEN GAS TRANSPORTATION PIPELINE STEEL, AND PRODUCTION METHOD

#4
20260028690
2026-01-29

STEEL BOARD FOR POLAR MARINE ENGINEERING AND PREPARATION METHOD THEREFOR

#5
20260022435
2026-01-22

Process for operating a thermal treatment line for the flexible thermal treatment of metal pre-products

#6
20250388990
2025-12-25

HOT-ROLLED COMPLEX-PHASE STEEL WITH 800-MPA-GRADE TENSILE STRENGTH AND MANUFACTURING METHOD THEREFOR

#7
20250376739
2025-12-11

HIGH HOLE EXPANSION STEEL AND METHOD FOR MANUFACTURING THEREFOR

#8
20250346972
2025-11-13

HIGH-TOUGHNESS STEEL AND METHOD FOR MANUFACTURING THE SAME

#9
20250346971
2025-11-13

HIGH-VANADIUM HIGH-SPEED STEEL AND PREPARATION METHOD THEREFOR, AND USE THEREOF

#10
20250319509
2025-10-16

PLATED STEEL SHEETS FOR HOT PRESS FORMING HAVING EXCELLENT HYDROGEN BRITTLENESS RESISTANCE AND IMPACT RESISTANCE, HOT PRESS FORMED PARTS, AND MANUFACTURING METHODS THEREOF

#11
20250313914
2025-10-09

SLAB FOR HIGH-STRENGTH STEEL SHEET AND COOLING METHOD THEREOF, PRODUCING METHOD OF HIGH-STRENGTH HOT-ROLLED STEEL SHEET, PRODUCING METHOD OF HIGH-STRENGTH COLD-ROLLED STEEL SHEET, AND PRODUCING METHOD OF HIGH-STRENGTH PLATED STEEL SHEET

#12
20250312842
2025-10-09

CONTINUOUSLY CAST SLAB AND METHOD FOR PRODUCING THE SAME

#13
20250305077
2025-10-02

ULTRA-LARGE LINEAR ENERGY WELDING STEEL AND PREPARATION METHOD THEREFOR

#14
20250296141
2025-09-25

CONTINUOUSLY CAST SLAB AND METHOD FOR PRODUCING THE SAME

#15
20250270666
2025-08-28

HIGH-PLASTICITY 1500-MPA-GRADE ULTRAHIGH-STRENGTH STEEL AND PREPARATION METHOD THEREFOR

#16
20250257419
2025-08-14

METHOD OF PRODUCING A FREE-CUTTING STEEL

#17
20250179600
2025-06-05

PROCESS FOR MANUFACTURING A FLAT STEEL PRODUCT HAVING AN ALUMINUM-BASED CORROSION-RESISTANT COATING, AND FLAT STEEL PRODUCT HAVING AN ALUMINUM-BASED CORROSION-RESISTANT COATING

#18
20250164188
2025-05-22

Method for inductively heating steel ingots on a transport shoe and device for carrying out the method

#19
20250084500
2025-03-13

LOW-CARBON, LOW-ALLOY AND HIGH-FORMABILITY DUAL-PHASE STEEL HAVING TENSILE STRENGTH OF GREATER THAN OR EQUAL TO 590 MPA, HOT-DIP GALVANIZED DUAL-PHASE STEEL, AND MANUFACTURING METHOD THEREFOR

#20
20250043375
2025-02-06

NI-FREE MICRO-ALLOYED HIGH-STRENGTH STEEL WITH ULTRA-LOW TEMPERATURE TOUGHNESS, AND PREPARATION METHOD THEREOF

#21
20250043374
2025-02-06

SEAWATER CORROSION-RESISTANT MARINE ENGINEERING STEEL AND PREPARATION METHOD THEREOF

#22
20250019784
2025-01-16

HEATING METHOD OF A METALLIC PRODUCT

#23
20250011891
2025-01-09

HIGH-STRENGTH STEEL WITH GOOD WEATHER RESISTANCE AND MANUFACTURING METHOD THEREFOR

#24
20240376561
2024-11-14

PRECIPITATION HARDENING MARTENSITIC STAINLESS STEEL HAVING EXCELLENT WELDABILITY, AND METHOD FOR PRODUCING THE SAME

#25
20240344185
2024-10-17

STEEL AND STEEL WIRE, WHICH ARE FOR SPRING, AND MANUFACTURING METHODS THEREFOR

#26
20240271240
2024-08-15

MARTENSITIC STAINLESS STEEL WITH IMPROVED STRENGTH AND CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR

#27
20240240294
2024-07-18

Medium-carbon boron-containing steel and controlled rolling and controlled cooling method for on-line normalizing treatment

#28
20240240277
2024-07-18

Method of forming a dynamically transformable nanotwinned structure in an austenite steel alloy

#29
20240093342
2024-03-21

ALUMINUM PLATED STEEL SHEET, THERMOFORMED COMPONENT, AND MANUFACTURING METHODS

#30
20240068062
2024-02-29

DEVICE FOR HEATING STEEL PRODUCTS

#31
20240035107
2024-02-01

Highly thick steel material having excellent low-temperature impact toughness and manufacturing method therefor

#32
20240035106
2024-02-01

HIGH STRENGTH THIN STEEL MATERIAL FOR API HAVING EXCELLENT RESISTANCE TO DEFORMATION AND METHOD OF MANUFACTURING SAME

#33
20230416885
2023-12-28

FERRITIC STAINLESS STEEL WITH IMPROVED STRENGTH, WORKABILITY, AND CORROSION RESISTANCE

#34
20230416857
2023-12-28

STEEL MATERIAL FOR SEISMIC DAMPER HAVING SUPERIOR IMPACT TOUGHNESS, AND MANUFACTURING METHOD FOR SAME

#35
20230357905
2023-11-09

A METHOD FOR PRODUCING SPHEROIDIZED OR NON-LAMELLAR MICROSTRUCTURE STEELS

#36
20230304117
2023-09-28

Process for manufacturing a flat steel product having an aluminum-based corrosion-resistant coating, and flat steel product having an aluminum-based corrosion-resistant coating

#37
20230286030
2023-09-14

Plated steel sheets for hot press forming having excellent hydrogen brittleness resistance and impact resistance, hot press formed parts, and manufacturing methods thereof

#38
20230235435
2023-07-27

STEEL FOR MINING CHAIN AND MANUFACTURING METHOD THEREOF

#39
20230235434
2023-07-27

ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PREPARING SAME

#40
20230235425
2023-07-27

High strength steel product and method of manufacturing the same

#41
20230227930
2023-07-20

ULTRAHIGH-STRENGTH DUAL-PHASE STEEL AND MANUFACTURING METHOD THEREFOR

#42
20230203614
2023-06-29

ABRASION-RESISTANT STEEL PLATE AND METHOD OF PRODUCING ABRASION-RESISTANT STEEL PLATE

#43
20230167521
2023-06-01

Shield for heat treating a plate workpiece

#44
20230158558
2023-05-25

Method for making a metal material composite

#45
20230127592
2023-04-27

Steel material and method for producing same

#46
20230118113
2023-04-20

STEEL

#47
20230114417
2023-04-13

STEEL FOR GLASS LINING AND PRODUCTION METHOD THEREFOR

#48
20230108640
2023-04-06

FREE-CUTTING STEEL AND METHOD OF PRODUCING SAME

#49
20230104637
2023-04-06

500 MPA GRADE LOW YIELD RATIO WEATHER-RESISTANT BRIDGE STEEL AND MANUFACTURING METHOD THEREFOR

#50
20230103684
2023-04-06

NICKEL-FREE LPG MARINE STEEL PLATE AND MANUFACTURING METHOD THEREFOR

#51
20230100311
2023-03-30

STEEL SHEET, MEMBER, AND PRODUCTION METHODS THEREFOR

#52
20230098225
2023-03-30

STEEL BOARD FOR POLAR MARINE ENGINEERING AND PREPARATION METHOD THEREFOR

#53
20230094959
2023-03-30

Steel with Controlled Yield Ratio and Manufacturing Method therefor

#54
20230017796
2023-01-19

HIGH-STRENGTH BLACKPLATE AND MANUFACTURING METHOD THEREFOR

#55
20230002869
2023-01-05

TIN BLACKPLATE FOR PROCESSING AND METHOD FOR MANUFACTURING SAME

#56
20220331856
2022-10-20

High-strength stainless steel rotor and method for preparing the same

#57
20220316801
2022-10-06

Layout of slab storerooms and furnaces for separate charging of cold blanks and hot blanks of thick plate, and furnace charging method

#58
20220107134
2022-04-07

Method for inductively heating steel ingots on a transport shoe and device for carrying out the method

#59
20220090862
2022-03-24

FURNACE WITH MOVABLE BEAM LOAD HANDLING SYSTEM

#60
20220042152
2022-02-10

ABRASION RESISTANT STEEL HAVING EXCELLENT HARDNESS AND IMPACT TOUGHNESS AND MANUFACTURING METHOD THEREFOR

#61
20220018003
2022-01-20

Steel sheet for cans and method for manufacturing the same

#62
20220017998
2022-01-20

Method of fabrication of composite material based on vanadium alloy and steel

#63
20210404030
2021-12-30

Steel for bolts, and method of manufacturing same

#64
20210301373
2021-09-30

Wrought magnesium alloy having improved properties, method of manufacturing same, and high-speed extrusion method using same

#65
20210262056
2021-08-26

Device and method for manufacturing metal clad strips continuously

#66
20210254190
2021-08-19

METHOD TO CONTROL THE COOLING OF A FLAT METAL PRODUCT

#67
20210238703
2021-08-05

EDGE FORMABILITY IN METALLIC ALLOYS

#68
20210172044
2021-06-10

High strength press quenchable 7XXX alloy

#69
20210164080
2021-06-03

Aluminum-based plated steel sheet, method of manufacturing aluminum-based plated steel sheet, and method of manufacturing component for vehicle

#70
20210156014
2021-05-27

Steel wire, a method for manufacturing the same, and method for manufacturing a spring or medical wire products

#71
20210147955
2021-05-20

Hot-stamped part and method for manufacturing same

#72
20210140024
2021-05-13

H-section steel and method of producing the same

#73
20210130937
2021-05-06

GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THEREFOR

#74
20210123122
2021-04-29

Steel sheet and manufacturing method of therefor

#75
20210102281
2021-04-08

Method of producing copper alloy material having high strength and excellent bend ability for automobile and electrical/electronic components

#76
20210087660
2021-03-25

Ferritic stainless steel having excellent high-temperature oxidation resistance, and manufacturing method therefor

#77
20210062309
2021-03-04

ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PREPARING SAME

#78
20200392609
2020-12-17

UTILITY FERRITIC STAINLESS STEEL WITH EXCELLENT HOT WORKABILITY AND MANUFACTURING METHOD THEREOF

#79
20200392608
2020-12-17

Steel material for low yield ratio, high-strength steel pipe having excellent low-temperature toughness, and manufacturing method therefor

#80
20200385846
2020-12-10

Wear-resistant steel having excellent hardness and impact toughness, and method for producing same

#81
20200340088
2020-10-29

LAMINATED CORE AND METHOD FOR THE PRODUCTION OF A HIGH PERMEABILITY SOFT MAGNETIC ALLOY

#82
20200263268
2020-08-20

High manganese steel for low temperature applications having excellent surface quality and a manufacturing method thereof

#83
20200087765
2020-03-19

High-strength steel material having enhanced resistance to crack initiation and propagation at low temperature and method for manufacturing the same

#84
20200087752
2020-03-19

Austenitic stainless steel having excellent processability and surface characteristics, and manufacturing method therefor

#85
20200087745
2020-03-19

FERRITIC STAINLESS STEEL HAVING EXCELLENT STRENGTH AND CORROSION RESISTANCE TO ACID AND METHOD OF MANUFACTURING THE SAME

#86
20200080179
2020-03-12

High-strength steel having excellent fracture initiation resistance and fracture propagation arrestability at low temperature and method of manufacturing the same

#87
20200080174
2020-03-12

Ferritic stainless steel for automotive exhaust system with improved heat resistance and condensate corrosion resistance, and method for manufacturing the same

#88
20200071798
2020-03-05

STEEL FOR PRESSURE VESSELS WITH EXCELLENT RESISTANCE TO HIGH-TEMPERATURE TEMPERING HEAT TREATMENT AND POST-WELD HEAT TREATMENT AND MANUFACTURING METHOD THEREFOR

#89
20200071783
2020-03-05

Rack steel plate with a thickness up to 177.8 mm by a continuous casting slab and manufacturing method thereof

#90
20200030873
2020-01-30

Method for producing austenite stainless steel slab

#91
20190352731
2019-11-21

Edge formability in metallic alloys

#92
20190316237
2019-10-17

FERRITIC STAINLESS STEEL HAVING EXCELLENT RIDGING PROPERTY AND EXCELLENT SURFACE QUALITY AND METHOD OF MANUFACTURING THE SAME

#93
20190226068
2019-07-25

PROCESS FOR MANUFACTURING HOT-ROLLED PLATE, STRIP OR COIL MADE OF DUPLEX STAINLESS STEEL

#94
20180354081
2018-12-13

Fluid end and method of manufacturing it

#95
20180155805
2018-06-07

High toughness and high tensile strength thick steel plate with excellent material homogeneity and production method for same

#96
20170306431
2017-10-26

APPARATUS FOR HEATING A METAL BILLET

#97
20170283894
2017-10-05

FERRITIC STAINLESS STEEL HAVING EXCELLENT DUCTILITY AND METHOD FOR MANUFACTURING SAME

#98
20170233841
2017-08-17

Material, method and component

#99
20170211162
2017-07-27

Method for producing a metal product

#100
20170166988
2017-06-15

Edge formability in metallic alloys

#101
20170159144
2017-06-08

Method for improving an iron-nickel-chromium-manganese alloy for timepiece applications

#102
20170152578
2017-06-01

Rolled steel bar for machine structural use and method of producing the same

#103
20170137904
2017-05-18

Rolled steel bar for machine structural use and method of producing the same

#104
20170130304
2017-05-11

Alloy with High Core Hardness Suitable for Rapid Nitriding

#105
20170129556
2017-05-11

Nitrided track pin for track chain assembly of machine

#106
20170088913
2017-03-30

High toughness and high tensile strength thick steel plate and production method therefor

#107
20170050414
2017-02-23

Methods for the production of clad steel products

#108
20170029912
2017-02-02

MARTENSITIC-FERRITIC STAINLESS STEEL, MANUFACTURED PRODUCT AND PROCESS USING THE S

#109
20170002437
2017-01-05

Titanium-free alloy

#110
20160369365
2016-12-22

Martensitic steel and method for producing same

#111
20160303635
2016-10-20

Edge formability in metallic alloys

#112
20160273078
2016-09-22

COPPER-NICKEL-TIN ALLOY WITH MANGANESE

#113
20160215358
2016-07-28

NON QUENCHED AND TEMPERED STEEL AND MANUFACTURING PROCESS THEREOF

#114
20160208358
2016-07-21

NON QUENCHED AND TEMPERED STEEL AND MANUFACTURING PROCESS THEREOF

#115
20160208357
2016-07-21

PROCESS FOR PRODUCING NON QUENCHED AND TEMPERED STEEL

#116
20160208356
2016-07-21

NON QUENCHED AND TEMPERED STEEL AND MANUFACTURING PROCESS THEREOF

#117
20160201171
2016-07-14

Cu—Sn coexisting steel and method for manufacturing the same

#118
20160193639
2016-07-07

Transporting apparatus for rolling ingots, use of such a transporting apparatus, and method for transporting rolling ingots

#119
20160187079
2016-06-30

Aluminum alloy fin material for heat exchanger excellent in strength, electrical conductivity, and brazeability, method for manufacturing aluminum alloy fin material for heat exchanger, and heat exchanger comprising aluminum alloy fin material for heat exchanger

#120
20160115574
2016-04-28

Duplex ferritic austenitic stainless steel

#121
20150299835
2015-10-22

HIGH-CHARACTERISTIC STEEL FOR LARGE-SIZE PARTS

#122
20150247224
2015-09-03

TiC-PARTICLE-REINFORCED HIGH STRENGTH AND LOW DENSITY STEEL PRODUCTS WITH IMPROVED E-MODULUS AND METHOD FOR PRODUCING SAID PRODUCT

#123
20150247223
2015-09-03

High strength and low density particle-reinforced steel with improved E-modulus and method for producing said steel

#124
20150243418
2015-08-27

Hot rolled silicon steel producing method

#125
20150176727
2015-06-25

THICK, HIGH-STRENGTH, SOUR-RESISTANT LINE PIPE AND METHOD FOR PRODUCING SAME

#126
20150167135
2015-06-18

DUPLEX STAINLESS STEEL

#127
20150152532
2015-06-04

High-strength low-alloy steel excellent in high-pressure hydrogen environment embrittlement resistance characteristics and method for producing the same

#128
20150041026
2015-02-12

Ingot for bearing and production process

#129
20140238099
2014-08-28

Process for making forged and machined components

#130
20130263436
2013-10-10

Production method of seamless tube using round bar made of high Cr-high Ni alloy

#131
20130216423
2013-08-22

High carbon steel wire rod having excellent drawability

#132
20120318305
2012-12-20

Device and Method for Controllably Cooling Metal Billets to be Hot Extruded

#133
20120199252
2012-08-09

Heat treatment of martensitic stainless steel after remelting under a layer of slag

#134
20120125569
2012-05-24

METHOD FOR HEATING LIGHTWEIGHT METAL INGOTS

#135
20110220249
2011-09-15

CONTINUOUS PRODUCTION SYSTEM FOR MAGNETIC PROCESSING OF METALS AND ALLOYS TO TAILOR NEXT GENERATION MATERIALS

#136
20110108169
2011-05-12

High-characteristic steel for large-size parts

#137
20110067787
2011-03-24

High-strength low-alloy steel excellent in high-pressure hydrogen environment embrittlement resistance characteristics and method for producing the same

#138
20100000636
2010-01-07

DUPLEX STAINLESS STEEL

#139
20090298001
2009-12-03

Roller hearth furnace for healing and/or temperature equalisation of steel or steel alloy continuous cast products and arrangement thereof before a hot strip final rolling mill

#140
20090090767
2009-04-09

METHOD AND SYSTEM FOR RESTORING PARENT METAL PROPERTIES ACROSS WELDS

#141
20080279713
2008-11-13

HIGH STRENGTH WEATHERING STEEL AND METHOD FOR PRODUCING THE SAME

#142
20080237946
2008-10-02

Continuous carburizing furnace

#143
20080110592
2008-05-15

METHOD FOR PRODUCING 700 MPA HIGH YIELD STRENGTH WEATHERING STEEL

#144
20070238061
2007-10-11

Method for heating a metal material

#145
20070113610
2007-05-24

Method and apparatus for manufacturing metal strips

#146
20060292513
2006-12-28

Method and device for cooling or quenching slabs and sheets with water in a cooling pond

#147
18072382
2023-09-26

Alloy steel having excellent hydrogen embrittlement resistance and strength and method of manufacturing same