| ReturnTo Theme-Group-Choice | Onelevelup |
| 4K032 | HEAT TREATMENT OF STEEL | |
| C21D7/00 -8/10@Z | ||
| C21D8/00-8/10 | AA | AA00 COMPONENTS OR IMPURITIES OF STEEL ALLOYS |
AA01 | AA02 | AA03 | AA04 | AA05 | AA06 | AA07 | AA08 | AA09 | AA10 |
| . Aluminum (Al) | . Boron (B) | . Bismuth (Bi) | . Components consisting of less than 0.1% carbon (C) | . Components consisting of more than 0.1% and less than 0.5% carbon (C) | . Components consisting of more than 0.5% and less than 1.0% carbon (C) | . Components consisting of 1.0% and over of carbon (C) | . Calcium (Ca) | . Components consisting of less than 1.0% of cobalt (Co) | . 1.0% and over of cobalt (Co) | |||
| AA11 | AA12 | AA13 | AA14 | AA15 | AA16 | AA17 | AA18 | AA19 | AA20 | |||
| . Components consisting of less than 1.0% of chromium (Cr) | . Components consisting of more than 1.0% and less than 10.0% of chromium (Cr) | . Components consisting of 10.0% and over of chromium (Cr) | . Components consisting of less than 1.0% of copper (Cu) | . Components consisting of 1.0% and over of copper (Cu) | . Components consisting of less than 2.0% of manganese (Mn) | . Components consisting of more than 2.0% and less than 10.0% of manganese (Mn) | . Components consisting of 10.0% and over of manganese (Mn) | . Components consisting of less than 1.0% of molybdenum (Mo) | . Components consisting of 1.0% and over of molybdenum (Mo) | |||
| AA21 | AA22 | AA23 | AA24 | AA25 | AA26 | AA27 | AA28 | AA29 | AA30 | |||
| . Nitrogen (N) | . Niobium (Nb) | . Components consisting of less than 1.0% of nickel (Ni) | . Components consisting of more than 1.0% and less than 10.0% of nickel (Ni) | . Components consisting of 10.0% and over of nickel (Ni) | . Oxygen (O) | . Phosphorus (P) | . Lead (Pb) | . Sulfur (S) | . Selenium (Se) | |||
| AA31 | AA32 | AA33 | AA34 | AA35 | AA36 | AA37 | AA38 | AA39 | AA40 | |||
| . Components consisting of less than 1.0% of silicon (Si) | . Components consisting of 1.0% and over of silicon (Si) | . Tantalum (Ta) | . Tellurium (Te) | . Titanium (Ti) | . Vanadium (V) | . Tungsten (W) | . Zinc (Zn) | . Zirconium (Zr) | . Rare earth metals (i.e., including yttrium (Y)) | |||
| BA | BA00 MANUFACTURING OF SPECIFIC ARTICLES |
BA01 | BA02 | BA03 | ||||||||
| . Plates and bands | . Wires and bars | . Tubes | ||||||||||
| CA | CA00 HEATING TEMPERATURE OF SLABS OR BILLETS |
CA01 | CA02 | CA03 | CA05 | |||||||
| . Temperatures of less than 1000 degrees C | . Temperatures of more than 1000EC and less than 1200 degrees C | . Temperatures of 1200 degrees C and over | . Continuous casting | |||||||||
| CB | CB00 HOT PROCESSING RATIO |
CB01 | CB02 | |||||||||
| . Ratios of less than 50% | . Ratios of 50% and over | |||||||||||
| CC | CC00 FINISHING TEMPERATURES FOR HOT ROLLING |
CC01 | CC02 | CC03 | CC04 | |||||||
| . Temperatures of less than 600 degrees C | . Temperatures of more than 600EC and less than 750 degrees C | . Temperatures of more than 750 degrees C and less than 850 degrees C | . Temperatures of 850 degrees C and over | |||||||||
| CD | CD00 COOLING SPEED FOR HEAT-ROLLING MATERIALS AFTER HEAT-ROLLING AND BEFORE WINDING |
CD01 | CD02 | CD03 | CD05 | CD06 | ||||||
| . Cooling speeds of less than 1 degree C/sec | . Cooling speeds of more than 1 degree C/sec and less than 10 degrees C/sec | . Cooling speeds of 10 degrees C/sec and over | . Air cooling (i.e., discharge cooling) | . Rapid cooling (i.e., water cooling) | ||||||||
| CE | CE00 WINDING TEMPERATURES OF HEAT-ROLLING MATERIALS |
CE01 | CE02 | |||||||||
| . Winding temperatures of less than 600 degrees C | . Winding temperatures of 600 degrees C and over | |||||||||||
| CF | CF00 REHEATING TEMPERATURES OF HEAT-ROLLING MATERIALS |
CF01 | CF02 | CF03 | ||||||||
| . Reheating temperatures of less than 600 degrees C | . Reheating temperatures of more than 600 degrees C and less than 800 degrees C | . Reheating temperatures of 800 degrees C and over | ||||||||||
| CG | CG00 COLD PROCESSING RATIO |
CG01 | CG02 | |||||||||
| . Ratios of less than 50% | . Ratios of 50% and over | |||||||||||
| CH | CH00 SPEED OF TEMPERATURE INCREASE OF COLD PROCESSING MATERIALS AND HEATING TEMPERATURE OF COLD PROCESSING MATERIALS |
CH01 | CH03 | CH04 | CH05 | CH06 | ||||||
| . Speed of temperature increase | . Heating temperature | . . Temperatures of less than 850 degrees C | . . Temperatures of more than 850 degrees C and less than 1000 degrees C | . . Temperatures of 1000 degrees C and over | ||||||||
| CJ | CJ00 COOLING SPEED AFTER HEAT-EQUALIZATION OF THE COLD WORKING MATERIALS |
CJ01 | CJ02 | CJ03 | CJ05 | CJ06 | ||||||
| . Cooling speeds of less than 1 degree C/sec | . Cooling speeds of more than 1 degree C/sec and less than 10 degrees C/sec | . Cooling temperatures of 10 degrees C/sec and over | . Rapid cooling (i.e., water cooling) | . Air cooling (i.e., discharge cooling) | ||||||||
| CK | CK00 TEMPERATURE MAINTENANCE DURING COOLING AND AFTER HEAT EQUALIZATION OF THE COLD WORKING MATERIALS |
CK01 | CK02 | CK03 | ||||||||
| . Temperatures of less than 400 degrees C | . Temperatures of more than 400 degrees C and less than 600 degrees C | . Temperatures of 600 degrees C and over | ||||||||||
| CL | CL00 REHEATING TEMPERATURE AFTER COOLING TO NEAR ROOM TEMPERATURE OF COLD WORKING MATERIALS |
CL01 | CL02 | CL03 | ||||||||
| . Reheating temperatures of less than 400 degrees C | . Reheating temperatures of more than 400 degrees C and less than 600 degrees C | . 600 degrees C and over | ||||||||||
| CM | CM00 RE-COOLING PROCESSING AFTER HEAT TREATMENT |
CM01 | ||||||||||
| . Re-cooling |