Hardening (C21D1/02 takes precedence); Quenching with or without subsequent tempering (quenching devices C21D1/62)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Hardening; Quenching with or without subsequent tempering

CPC: Hardening (C21D1/02 takes precedence); Quenching with or without subsequent tempering (quenching devices C21D1/62)

Full Title

Full titles differ between systems:

IPC:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Hardening; Quenching with or without subsequent tempering

CPC:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Hardening (C21D1/02 takes precedence); Quenching with or without subsequent tempering (quenching devices C21D1/62)

Of 3 combined children, 2 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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C21D 1/185 CPC only CPC only
C21D 1/19 by interrupted quenching since 1980 IPC+CPC Available in IPC and CPC
C21D 1/25 Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten") since 1980 IPC+CPC Available in IPC and CPC