The magnitude of the stresses on the tooling in cold extrusion, however, is very (especially with…

The
magnitude of the stresses on the tooling in cold extrusion, however, is very
(especially with steel and specialty-alloy work pieces), being on the order of
the hardness of the work piece material. The punch hardness usually ranges
between 60 and 65 HRC and the die hardness between 58 and 62 I-IRC.

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