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PCE
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DIFF Subgroup
C21D 1/62

Quenching devices

Introduced: September 1968

Full Title

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Quenching devices

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

IPC defines codes here since 1980.

Child Classifications

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  • C21D 1/667 for spray quenching since 1980 IPC+CPC Available in IPC and CPC
  • C21D 1/673 for die quenching since 1980 IPC+CPC Available in IPC and CPC