C22C ALLOYS (flints C06C15/00; treatment of alloys C21D, C22F)
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.
35 direct subcodes
Child Classifications
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- C22C 1/00 Making non-ferrous alloys (by electrothermic methods C22B4/00; by electrolysis C25C1/24, C25C3/36)
- C22C 11/00 Alloys based on lead
- C22C 12/00 Alloys based on antimony or bismuth
- C22C 13/00 Alloys based on tin
- C22C 14/00 Alloys based on titanium
- C22C 16/00 Alloys based on zirconium
- C22C 18/00 Alloys based on zinc
- C22C 19/00 Alloys based on nickel or cobalt
- C22C 20/00 Alloys based on cadmium
- C22C 21/00 Alloys based on aluminium
- C22C 22/00 Alloys based on manganese
- C22C 2200/00 Crystalline structure
- C22C 2202/00 Physical properties
- C22C 2204/00 End product comprising different layers, coatings or parts of cermet
- C22C 23/00 Alloys based on magnesium
- C22C 24/00 Alloys based on an alkali or an alkaline earth metal
- C22C 25/00 Alloys based on beryllium
- C22C 26/00 Alloys containing diamond
- C22C 27/00 Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C 28/00 Alloys based on a metal not provided for in groups C22C5/00 - C22C27/00
Top Applicants
Top 10 applicants by patent filingsfor 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