C
SECTION C — CHEMISTRY AND METALLURGY
 C

Note(s)

Definitions for Section C:

  • Alkali metals: Li, Na, K, Rb, Cs, Fr
  • Alkaline earth metals: Ca, Sr, Ba, Ra
  • Lanthanides: elements with atomic numbers 57 to 71 inclusive
  • Rare earths: Sc, Y, Lanthanides
  • Actinides: elements with atomic numbers 89 to 103 inclusive
  • Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
  • Halogens: F, Cl, Br, I, At
  • Noble gases: He, Ne, Ar, Kr, Xe, Rn
  • Platinum group: Os, Ir, Pt, Ru, Rh, Pd
  • Noble metals: Ag, Au, Platinum group
  • Light metals: alkali metals, alkaline earth metals, Be, Al, Mg
  • Heavy metals: metals other than light metals
  • Iron group: Fe, Co, Ni
  • Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens
  • Metals: elements other than non-metals
  • Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards

  
METALLURGY
 C22
METALLURGY (of iron C21); FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS (general methods or devices for heat treatment of ferrous or non-ferrous metals or alloys C21D; production of metals by electrolysis or electrophoresis C25)
 C22C
ALLOYS (treatment thereof C21D, C22F)
 C22C

Note(s)

  1. In groups C22C 5/00-C22C 32/00 an alloy is classified in the last appropriate place. [2]
  2. The term "based on" requires at least 50% by weight of the specified constituent or of the specified group of constituents. [2]
 C22C 1/00 - 
C22C 32/00
Non-ferrous alloys, i.e. alloys based essentially on metals other than iron (master alloys for iron and steel C22C 35/00; alloys containing radioactive material C22C 43/00)
 C22C 1/00
Making alloys (powder-metallurgical apparatus or processes, not specially modified for making alloys B22F; by electrothermic methods C22B 4/00; by electrolysis C25C)
 C22C 1/02
·  by melting
 C22C 1/03
·  ·  using master alloys  [2]
 C22C 1/04
·  by powder metallurgy (C22C 1/08, C22C 1/09 take precedence)  [2]
 C22C 1/05
·  ·  Mixtures of metal powder with non-metallic powder (C22C 1/08, C22C 1/09 take precedence)  [2]
 C22C 1/06
·  with the use of special agents for refining or deoxidising
 C22C 1/08
·  Alloys with open or closed pores
 C22C 1/09
·  Alloys containing metallic or non-metallic fibres or filaments  [2]
 C22C 1/10
·  Alloys containing non-metals (C22C 1/08, C22C 1/09 take precedence)  [2]
 C22C 3/00
Removing material from alloys to produce alloys of different constitution
 C22C 5/00
Alloys based on noble metals
 C22C 5/02
·  Alloys based on gold  [2]
 C22C 5/04
·  Alloys based on a platinum group metal  [2]
 C22C 5/06
·  Alloys based on silver  [2]
 C22C 5/08
·  ·  with copper as the next major constituent  [2]
 C22C 5/10
·  ·  with cadmium as the next major constituent  [2]
 C22C 7/00
Alloys based on mercury
 C22C 9/00
Alloys based on copper
 C22C 9/01
·  with aluminium as the next major constituent  [2]
 C22C 9/02
·  with tin as the next major constituent  [2]
 C22C 9/04
·  with zinc as the next major constituent  [2]
 C22C 9/05
·  with manganese as the next major constituent  [2]
 C22C 9/06
·  with nickel or cobalt as the next major constituent  [2]
 C22C 9/08
·  with lead as the next major constituent  [2]
 C22C 9/10
·  with silicon as the next major constituent
 C22C 9/12
( covered by C22C 1/04 )
 C22C 11/00
Alloys based on lead
 C22C 11/02
·  with an alkali or an alkaline earth metal as the next major constituent  [2]
 C22C 11/04
·  with copper as the next major constituent  [2]
 C22C 11/06
·  with tin as the next major constituent  [2]
 C22C 11/08
·  with antimony or bismuth as the next major constituent  [2]
 C22C 11/10
·  ·  with tin  [2]
 C22C 12/00
Alloys based on antimony or bismuth  [2]
 C22C 13/00
Alloys based on tin
 C22C 13/02
·  with antimony or bismuth as the next major constituent  [2]
 C22C 14/00
Alloys based on titanium  [2]
 C22C 16/00
Alloys based on zirconium  [2]
 C22C 18/00
Alloys based on zinc  [2]
 C22C 18/02
·  with copper as the next major constituent  [2]
 C22C 18/04
·  with aluminium as the next major constituent  [2]
 C22C 19/00
Alloys based on nickel or cobalt
 C22C 19/03
·  based on nickel  [2]
 C22C 19/05
·  ·  with chromium  [2]
 C22C 19/07
·  based on cobalt  [2]
 C22C 19/08
( covered by C22C 1/04 )
 C22C 20/00
Alloys based on cadmium  [2]
 C22C 21/00
Alloys based on aluminium
 C22C 21/02
·  with silicon as the next major constituent  [2]
 C22C 21/04
·  ·  Modified aluminium-silicon alloys
 C22C 21/06
·  with magnesium as the next major constituent  [2]
 C22C 21/08
·  ·  with silicon  [2]
 C22C 21/10
·  with zinc as the next major constituent  [2]
 C22C 21/12
·  with copper as the next major constituent  [2]
 C22C 21/14
·  ·  with silicon  [2]
 C22C 21/16
·  ·  with magnesium  [2]
 C22C 21/18
·  ·  with zinc  [2]
 C22C 21/20
( covered by C22C 1/04 )
 C22C 22/00
Alloys based on manganese  [2]
 C22C 23/00
Alloys based on magnesium
 C22C 23/02
·  with aluminium as the next major constituent  [2]
 C22C 23/04
·  with zinc or cadmium as the next major constituent  [2]
 C22C 23/06
·  with a rare earth metal as the next major constituent  [2]
 C22C 24/00
Alloys based on an alkali or an alkaline earth metal  [2]
 C22C 25/00
Alloys based on beryllium
 C22C 27/00
Alloys based on rhenium or a refractory metal not mentioned in groups C22C 14/00 and C22C 16/00  [2]
 C22C 27/02
·  Alloys based on vanadium, niobium or tantalum  [2]
 C22C 27/04
·  Alloys based on tungsten or molybdenum  [2]
 C22C 27/06
·  Alloys based on chromium  [2]
 C22C 28/00
Alloys based on a metal not provided for in groups C22C 5/00-C22C 27/00  [2]
 C22C 29/00
Alloys based on borides, carbides, nitrides, oxides or silicides  [2]
 C22C 30/00
Alloys containing less than 50% by weight of each constituent  [2]
 C22C 30/02
·  containing copper  [2]
 C22C 30/04
·  containing tin or lead  [2]
 C22C 30/06
·  containing zinc  [2]
 C22C 32/00
Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of borides, carbides, nitrides, oxides, or silicides, whether added as such or formed in situ  [2]
 C22C 33/00 - 
C22C 38/00
Ferrous alloys (alloys containing radioactive material C22C 43/00; heat treatment thereof C21D)
 C22C 33/00
Making ferrous alloys
 C22C 33/02
·  by powder metallurgy (working metallic powder B22F)
 C22C 33/04
·  by melting  [2]
 C22C 33/06
·  ·  using master alloys  [2]
 C22C 33/08
·  Making cast-iron alloys  [2]
 C22C 33/10
·  ·  including procedures for adding magnesium  [2]
 C22C 33/12
·  ·  ·  by fluidised injection  [2]
 C22C 35/00
Master alloys for iron or steel
 C22C 37/00 - 
C22C 38/00

Note(s)

In the absence of an indication to the contrary, in groups C22C 37/00 and C22C 38/00 an alloy is classified in the last appropriate place that provides for one of the alloying components. [2]

 C22C 37/00
Cast-iron alloys  [2]
 C22C 37/04
·  containing spheroidal graphite
 C22C 37/06
·  containing chromium  [2]
 C22C 37/08
·  ·  with nickel
 C22C 37/10
·  containing aluminium or silicon
 C22C 38/00
Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C 37/00)  [2]
 C22C 38/02
·  containing silicon  [2]
 C22C 38/04
·  containing manganese  [2]
 C22C 38/06
·  containing aluminium  [2]
 C22C 38/08
·  containing nickel  [2]
 C22C 38/10
·  containing cobalt  [2]
 C22C 38/12
·  containing tungsten, tantalum, molybdenum, vanadium or niobium  [2]
 C22C 38/14
·  containing titanium or zirconium  [2]
 C22C 38/16
·  containing copper  [2]
 C22C 38/18
·  containing chromium  [2]
 C22C 38/20
·  ·  with copper  [2]
 C22C 38/22
·  ·  with molybdenum or tungsten  [2]
 C22C 38/24
·  ·  with vanadium  [2]
 C22C 38/26
·  ·  with niobium or tantalum  [2]
 C22C 38/28
·  ·  with titanium or zirconium  [2]
 C22C 38/30
·  ·  with cobalt  [2]
 C22C 38/32
·  ·  with boron  [2]
 C22C 38/34
·  ·  with more than 1.5% by weight of silicon  [2]
 C22C 38/36
·  ·  with more than 1.7% by weight of carbon  [2]
 C22C 38/38
·  ·  with more than 1.5% by weight of manganese  [2]
 C22C 38/40
·  ·  with nickel  [2]
 C22C 38/42
·  ·  ·  with copper  [2]
 C22C 38/44
·  ·  ·  with molybdenum or tungsten  [2]
 C22C 38/46
·  ·  ·  with vanadium  [2]
 C22C 38/48
·  ·  ·  with niobium or tantalum  [2]
 C22C 38/50
·  ·  ·  with titanium or zirconium  [2]
 C22C 38/52
·  ·  ·  with cobalt  [2]
 C22C 38/54
·  ·  ·  with boron  [2]
 C22C 38/56
·  ·  ·  with more than 1.7% by weight of carbon  [2]
 C22C 38/58
·  ·  ·  with more than 1.5% by weight of manganese  [2]
 C22C 38/60
·  containing lead, selenium, tellurium or antimony, or more than 0.04% by weight of sulphur  [2]
 C22C 43/00
Alloys containing radioactive materials  [2]