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  • Users: Mononcue
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  1. Mononcue

    Cracking problem on 440C durring wire EDM

    I have some parts wire edm cut from a round blank of 440C. The material is hardened to 52-56 HRC per AMS 2759/5 type 3 with sub zero cooling. The certs say it is 54-55 HRC. During the edm process the tips of my part tend to crack. This has only occurred twice out of many parts, but since it...

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