containing chromium

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Ferrous alloys, e.g. steel alloys > containing chromium

CPC:

Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00) > containing chromium

IPC and CPC are identically structured here. All 11 subcodes exist in both systems.

IPC defines codes here since 1974.

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C22C 38/20 with copper since 1974 IPC+CPC Available in IPC and CPC
C22C 38/22 with molybdenum or tungsten since 1974 IPC+CPC Available in IPC and CPC
C22C 38/24 with vanadium since 1974 IPC+CPC Available in IPC and CPC
C22C 38/26 with niobium or tantalum since 1974 IPC+CPC Available in IPC and CPC
C22C 38/28 with titanium or zirconium since 1974 IPC+CPC Available in IPC and CPC
C22C 38/30 with cobalt since 1974 IPC+CPC Available in IPC and CPC
C22C 38/32 with boron since 1974 IPC+CPC Available in IPC and CPC
C22C 38/34 with more than 1.5% by weight of silicon since 1974 IPC+CPC Available in IPC and CPC
C22C 38/36 with more than 1.7% by weight of carbon since 1974 IPC+CPC Available in IPC and CPC
C22C 38/38 with more than 1.5% by weight of manganese since 1974 IPC+CPC Available in IPC and CPC
C22C 38/40 with nickel since 1974 IPC+CPC Available in IPC and CPC

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

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