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4K037 | Heat treatment of sheet steel | |
C21D9/46 -9/46@Z;9/48-9/48@Z |
C21D9/46@E-9/48@Z | EA | EA00 COMPONENTS AND IMPURITIES OF STEEL ALLOY |
EA01 | EA02 | EA03 | EA04 | EA05 | EA06 | EA07 | EA08 | EA09 | EA10 |
. Al | . B | . Bi | . C 0.01% or less. | . C 0.01% to 0.1% | . C 0.1% to 0.5% | . C 0.5% to 1% | . C 1% or more | . Ca | . Co | |||
EA11 | EA12 | EA13 | EA14 | EA15 | EA16 | EA17 | EA18 | EA19 | EA20 | |||
. Cr 5% or less | . Cr 5% or more | . Cu | . Mg | . Mn 2% or less | . Mn 2% or more | . Mo | . N | . Nb | . Ni 5% or less | |||
EA21 | EA22 | EA23 | EA24 | EA25 | EA26 | EA27 | EA28 | EA29 | EA30 | |||
. Ni 5% or more | . O | . P | . Pb | . S | . Sb | . Si 1% or less | . Si 1% or more | . Ta | . Te | |||
EA31 | EA32 | EA33 | EA34 | EA35 | EA36 | |||||||
. Ti | . V | . W | . Zn | . Zr | . Rare earth metals | |||||||
EB | EB00 TYPE OR STRUCTURE OF STEEL SHEETS |
EB01 | EB02 | EB03 | EB05 | EB06 | EB07 | EB08 | EB09 | |||
. C 0.006% or less as maximum content | . C 0.004% or less as a minimum content | . C 0.007% to 0.02% as a maximum content | . Mn being 0.5% or more as a minimum content | . Mn being 0.4% or less as a minimum content or Mn being 0.7% or more as a maximum content | . Cu exceeding 0.5% as a maximum content | . P exceeding 0.02% as a maximum content | . Si exceeding 0.5% as a maximum content | |||||
EB11 | EB12 | EB13 | EB14 | EB15 | ||||||||
. Complex-structures | . . Residual austenite | . Precipitation hardened steels including stainless steels | . Complex phase-structured stainless steels | . Clad materials | ||||||||
EC | EC00 MANUFACTURE OF ROLLING MATERIALS, E.G. CAST IRON PIECES OR STEEL PIECES |
EC01 | EC02 | EC04 | EC05 | |||||||
. Continuous casting methods | . . Thin cast iron pieces or thin cast iron strips | . Adjustment of components structure or precipitated materials | . Preparatory treatment or working or preparatory rolling | |||||||||
FA | FA00 HEATING OF CAST IRON PIECES, E.G. SLABS, OR HEATING OF STEEL PIECES |
FA01 | FA02 | FA03 | FA05 | FA06 | ||||||
. Heating at the temperature of 1000 degree centigrade or below | . Heating at the temperature of 1000 degree centigrade to 1200 degree centigrade | . Heating at the temperature of 1200 degree centigrade or higher | . Direct rolling | . Insertion of hot cast iron pieces into heating furnaces or hot charge | ||||||||
FB | FB00 HOT ROLLING |
FB01 | FB03 | FB04 | FB05 | FB06 | FB07 | FB08 | FB10 | |||
. Hot rolling total draft being less than 50% | . Lubricated rolling. | . Intermediate heat treatments | . Predetermined hot rolling schedules | . . Rough rolling ratio or rough rolling path schedule | . . Finish rolling ratio or finish rolling path schedule | . . . Drafts of a finish post path or a final path | . Other hot rolling conditions or special rolling methods | |||||
FC | FC00 HOT ROLLING FINISH OR END TEMPERATURES |
FC01 | FC02 | FC03 | FC04 | FC05 | FC07 | FC08 | ||||
. 600 degree centigrade or below | . from 600 degree centigrade to 750 degree centigrade | . from 750 degree centigrade to 850 degree centigrade | . from 850 degree centigrade to 1000 degree centigrade | . 1000 degree centigrade or higher | . Finishing at the minimum temperature of Ar3 point or higher | . Finishing at the maximum temperature of Ar3 point or below | ||||||
FD | FD00 COOLING SPEEDS FROM A HOT ROLLING STEP TO A COILING STEP |
FD01 | FD02 | FD03 | FD04 | FD05 | FD06 | FD08 | ||||
. 1 degree centigrade per second or below | . from 1 degree centigrade per second to 10 degree centigrade per second | . from 10 degree centigrade per second to 30 degree centigrade per second | . 30 degree centigrade per second or higher | . Air cooling or open cooling | . Water cooling or accelerated cooling | . Temporarily retaining temperatures or annealing after hot rolling | ||||||
FE | FE00 COILING TEMPERATURES OF HOT-ROLLED STEEL SHEETS |
FE01 | FE02 | FE03 | FE05 | FE06 | ||||||
. 550 degree centigrade or below | . from 550 degree centigrade to 650 degree centigrade | . 650 degree centigrade or higher | . Coiling temperatures being 600 degree centigrade or higher as a minimum temperature | . Coiling temperatures being 600 degree centigrade or below as a maximum temperature | ||||||||
FF | FF00 ANNEALING OF HOT-ROLLED STEEL SHEETS |
FF01 | FF02 | FF03 | FF05 | |||||||
. Heating temperatures being 600 degree centigrade or below | . Heating temperatures from 600 degree centigrade to 800 degree centigrade | . Heating temperatures of 800 degree centigrade or higher | . without annealing of hot-rolled steel sheets or stainless steels | |||||||||
FG | FG00 COLD ROLLING |
FG01 | FG03 | FG10 | ||||||||
. Cold rolling whose total draft is less than 50% | . Twice or more cold rolling | . Other cold rolling conditions or special rolling methods | ||||||||||
FH | FH00 COLD-ROLLED STEEL SHEET ANNEALING |
FH01 | FH03 | FH04 | FH05 | FH07 | FH08 | |||||
. Continuous annealing | . Box annealing or batch annealing | . . Open coil annealing | . Intermediate annealing conditions | . Decarburising annealing | . Heating without annealing or heating at the recrystallisation temperature or below. | |||||||
FJ | FJ00 HEATING CONDITIONS FOR COLD-ROLLED STEEL SHEET ANNEALING EXCLUDING INTERMEDIATE ANNEALING |
FJ01 | FJ02 | FJ04 | FJ05 | FJ06 | FJ07 | |||||
. Temperature rising speed | . Heating atmospheres | . 700 degree centigrade or below | . from 700 degree centigrade to 850 degree centigrade | . from 850 degree centigrade to 1000 degree centigrade | . 1000 degree centigrade or higher | |||||||
FK | FK00 COOLING SPEEDS OF COLD-ROLLED SHEETS AFTER ANNEALING |
FK01 | FK02 | FK03 | FK05 | FK06 | FK08 | |||||
. 1 degree centigrade per second or below | . from 1 degree centigrade per second to 10 degree centigrade per second | . 10 degree centigrade per second or higher | . Air cooling or open cooling | . Water cooling or accelerated cooling | . changing cooling speed during the process | |||||||
FL | FL00 OVERAGEING PROCESSING |
FL01 | FL02 | FL03 | FL05 | |||||||
. 400 degree centigrade or below | . from 400 degree centigrade to 600 degree centigrade | . 600 degree centigrade or higher | . Overageing heat cycles | |||||||||
FM | FM00 TREATMENTS AFTER HEAT TREATMENT |
FM01 | FM02 | FM04 | ||||||||
. Re-cold workings | . . Temper rolling or skin pass rolling | . Reheating treatments | ||||||||||
GA | GA00 SURFACE TREATMENTS |
GA01 | GA02 | GA03 | GA04 | GA05 | GA07 | GA08 | ||||
. Adjustments of surface roughness | . Chemical conversion treatments | . Coating treatments | . Enamelling treatments | . Plating treatments | . Diffusion treatments e.g. carburisation or nit ridings | . Removing conditions of scales e.g. acid cleanings. | ||||||
HA | HA00 PROPERTIES OF STEEL SHEETS |
HA01 | HA02 | HA03 | HA04 | HA05 | HA06 | |||||
. Coating bake-hardenability | . Second working embrittlement resistances or vertical crack resistances | . Uniformity of coil materials | . Plane anisotropy | . Surface properties | . . Ridging or roving | |||||||
JA | JA00 OTHERS |
JA01 | JA02 | JA03 | JA04 | JA06 | JA07 | JA10 | ||||
. Other numerical limitations | . . Numerical limitations relating to working or rolling | . . . Working speeds or strain rates | . . . Rolling roll diameters | . . Numerical limitations relating to raw materials intermediate products or finished products | . . . Crystal particle sizes | . relating to apparatuses or controls |