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  • Users: nrgent
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  1. nrgent

    AISI 4140

    Hi, I would like to know the differace between 4140 to E-4140. What the refers to? Thx
  2. nrgent

    Hardening maraging 300

    Hi, I would like to use M300 as a needle bearing inner race. Is there a mathod to harden M300 to 57-60 Rc other than nitriding? Maybe induction? Thx

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