ALLOYS (flints C06C15/00; treatment of alloys C21D, C22F)

Introduced: September 1968

Description

C22C covers the composition, structure, and properties of alloys—metallic materials composed of two or more elements where at least one is a metal. This subclass includes ferrous alloys (iron-based), non-ferrous alloys (aluminum, copper, nickel, titanium, magnesium, zinc, and other metal bases), and their constituent phases and microstructures. The classification encompasses alloy design, alloying elements' effects on mechanical and physical properties, corrosion resistance, heat treatability, and technological specifications for industrial applications ranging from structural materials to precision components. Related processing methods and heat treatment are covered elsewhere in C22B-C22F.

Title

Titles differ between systems:

IPC: ALLOYS

CPC: ALLOYS (flints C06C15/00; treatment of alloys C21D, C22F)

Full Title

Full titles differ between systems:

IPC:

ALLOYS

CPC:

ALLOYS (flints C06C15/00; treatment of alloys C21D, C22F)

Additional Content IPC

Glossary

Alloy alloys A composition of plural elements at least one of which is a free metal. Also includes material containing any combination of fibres, filaments, whiskers and particles, e.g. carbides, diamond, oxides, borides, nitrides or silicides, or other metal compounds, e.g. oxynitrides or sulfides, embedded in a metallic matrix. Amorphous Possessing no regular crystalline arrangement of atoms. Cermet cermets Material containing any combination of fibres, filaments, whiskers, and particles, e.g. carbides, diamond, oxides, borides, nitrides, silicides, or other metal compounds, e.g. oxynitrides or sulfides, embedded in a metallic matrix. Master alloy master alloys A mixture or alloy of elements which are to be added to a charge or molten metal in order to provide a desired composition, deoxidize the molten metal or provide a fine grain size, etc. Refining Purification of metal by removal of impurities therefrom.

Limiting references

Powder metallurgical apparatus or processes, not specifically modified for making alloys Rods, electrodes, materials or media, for use in soldering, welding or cutting Ceramic products containing shaped metallic materials Electrolytic production or refining of metals Single crystals or homogeneous polycrystalline material with defined structure, e.g. directionally solidified Magnets

Of 38 combined children, 32 exist in both systems.

3 codes are CPC-only extensions, 3 exist only in IPC.

Note: 3 CPC extensions are marked as secondary classification only.

8 shared codes have differing titles between IPC and CPC.

Child Classifications

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C22C 1/00 Making non-ferrous alloys (by electrothermic methods C22B4/00; by electrolysis C25C1/24, C25C3/36) +1 CPC IPC+CPC Available in IPC and CPC
C22C 101/00 Non-metallic fibres or filaments since 2000 −2 IPC IPC only IPC only
C22C 11/00 Alloys based on lead IPC+CPC Available in IPC and CPC
C22C 111/00 Metallic fibres or filaments since 2000 −1 IPC IPC only IPC only
C22C 12/00 Alloys based on antimony or bismuth since 1974 IPC+CPC Available in IPC and CPC
C22C 121/00 Pretreated fibres or filaments since 2000 −1 IPC IPC only IPC only
C22C 13/00 Alloys based on tin IPC+CPC Available in IPC and CPC
C22C 14/00 Alloys based on titanium since 1974 IPC+CPC Available in IPC and CPC
C22C 16/00 Alloys based on zirconium since 1974 IPC+CPC Available in IPC and CPC
C22C 18/00 Alloys based on zinc since 1974 IPC+CPC Available in IPC and CPC
C22C 19/00 Alloys based on nickel or cobalt +3 CPC IPC+CPC Available in IPC and CPC
C22C 20/00 Alloys based on cadmium since 1974 IPC+CPC Available in IPC and CPC
C22C 21/00 Alloys based on aluminium +2 CPC IPC+CPC Available in IPC and CPC
C22C 22/00 Alloys based on manganese since 1974 IPC+CPC Available in IPC and CPC
C22C 2200/00 Crystalline structure 2nd only +3 CPC CPC only CPC only
C22C 2202/00 Physical properties 2nd only +2 CPC CPC only CPC only
C22C 2204/00 End product comprising different layers, coatings or parts of cermet 2nd only CPC only CPC only
C22C 23/00 Alloys based on magnesium IPC+CPC Available in IPC and CPC
C22C 24/00 Alloys based on an alkali or an alkaline earth metal since 1974 IPC+CPC Available in IPC and CPC
C22C 25/00 Alloys based on beryllium IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class C22,2013–2023, worldwide · Source: EPO PATSTAT

JFE STEEL JP 7,152
NIPPON STEEL CORPORATION JP 5,416
POSCO (POHANG IRON AND STEEL COMPANY) KR 4,530
JFE STEEL 3,986
CENTRAL SOUTH UNIVERSITY 3,086
NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,843
CHINESE ACADEMY OF SCIENCES 2,702
ARCELORMITTAL LU 2,124
NSSMC (NIPPON STEEL & SUMITOMO METAL) 2,075
KOBE STEEL JP 1,891

Top Applicants (CPC)

Class C22,2013–2023, worldwide · Source: EPO PATSTAT

JFE STEEL JP 7,620
NIPPON STEEL CORPORATION JP 5,769
POSCO (POHANG IRON AND STEEL COMPANY) KR 4,523
JFE STEEL 3,080
NSSMC (NIPPON STEEL & SUMITOMO METAL) JP 2,999
ARCELORMITTAL LU 2,962
CENTRAL SOUTH UNIVERSITY 2,431
KOBE STEEL JP 2,100
CHINESE ACADEMY OF SCIENCES 2,052
MITSUBISHI MATERIALS CORPORATION JP 1,405