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PCE
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DIFF Subgroup
C21D 8/0221

characterised by the working steps

Introduced: January 2026

Full Title

Full titles differ between systems:

IPC:

Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment > during manufacturing of plates or strips > characterised by the working steps

CPC:

Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment (hardening articles or materials formed by forging or rolling with no further heating beyond that required for the formation C21D1/02) > during manufacturing of plates or strips (C21D8/12 takes precedence) > characterised by the working steps

Of 4 combined children, 0 exist in both systems.

4 codes are CPC-only extensions.

Child Classifications

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