|  | 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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...C21D; production of metals by electrolysis or electrophoresis Fulltext... Hierarchy... Expanded...C25)

|  | C22C |
ALLOYS (treatment thereof Fulltext... Hierarchy... Expanded...C21D, Fulltext... Hierarchy... Expanded...C22F)

|  | C22C |
Note(s) In groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...C22C 5/00-C22C 32/00 an alloy is classified in the last appropriate place. [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 Fulltext... Hierarchy... Expanded...C22C 35/00; alloys containing radioactive material Fulltext... Hierarchy... Expanded...C22C 43/00)

|  | C22C 1/00 |
Making alloys (powder-metallurgical apparatus or processes, not specially modified for making alloys Fulltext... Hierarchy... Expanded...B22F; by electrothermic methods Fulltext... Hierarchy... Expanded...C22B 4/00; by electrolysis Fulltext... Hierarchy... Expanded...C25C)

|  | C22C 1/02 |
· | by melting

|  | C22C 1/03 |
· · | using master alloys [2]

|  | C22C 1/04 |
· | by powder metallurgy (Fulltext... Hierarchy... Expanded...C22C 1/08, Fulltext... Hierarchy... Expanded...C22C 1/09 take precedence) [2]

|  | C22C 1/05 |
· · | Mixtures of metal powder with non-metallic powder (Fulltext... Hierarchy... Expanded...C22C 1/08, Fulltext... Hierarchy... Expanded...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 (Fulltext... Hierarchy... Expanded...C22C 1/08, Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...C22C 14/00 and Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...C22C 43/00; heat treatment thereof Fulltext... Hierarchy... Expanded...C21D)

|  | C22C 33/00 |
Making ferrous alloys

|  | C22C 33/02 |
· | by powder metallurgy (working metallic powder Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...C22C 37/00 and Fulltext... Hierarchy... Expanded...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 Fulltext... Hierarchy... Expanded...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]