during manufacturing of articles with special electromagnetic properties

Full Title

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 articles with special electromagnetic properties

Child Classifications

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• C21D 8/1205 involving particular fabrication steps or treatments of ingots or slabs
• C21D 8/1216 characterised by the working steps
• C21D 8/1244 characterised by the heat treatment
• C21D 8/1277 involving a particular surface treatment (C21D8/1294 takes precedence)
• C21D 8/1294 involving a localised treatment