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  1. Crzyconvdude

    4140 steel harden/temper suggestions...

    First post here thanks in advance for any assistance available. 2 3/16" dia round 4140. I am trying to achieve HRC Value of 35-40 through hardened. using the lower range of HRC-35, my numbers put a piece like this at: 158 ksi ultimate 140 ksi yield and this required for my application...

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