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Robert J

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  1. Robert J joined the community

  2. Trouble with S7 heat treatment, won't air harden.

    Robert J replied to Adam R.'s topic in Heat Treating, general discussion
    I run a tool shop and harden all kinds of steel on a daily basis. McMaster-Carr has a problem they won’t admit to. I just sent a piece of S7 out to a metrology shop to get tested. We only buy small amounts from McMaster and have wasted a lot of time and money on S7. No problem with 420, H13, A2. And yes the S7 came with certs.

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