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PCE
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DIFF Subgroup
C21D 1/68

Temporary coatings or embedding materials applied before or during heat treatment

Introduced: September 1968

Full Title

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Temporary coatings or embedding materials applied before or during heat treatment

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

Child Classifications

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  • C21D 1/70 while heating or quenching IPC+CPC Available in IPC and CPC
  • C21D 1/72 during chemical change of surfaces IPC+CPC Available in IPC and CPC