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)

Child Classifications

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• C21D 8/02 during manufacturing of plates or strips (C21D8/12 takes precedence)
• C21D 8/06 during manufacturing of rods or wires
• C21D 8/10 during manufacturing of tubular bodies
• C21D 8/12 during manufacturing of articles with special electromagnetic properties