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  • Users: mrbebu
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  1. mrbebu

    Heat Treatment of 1144

    Hello All, I have a situation where a batch of parts (highly re-used specialized M12 to M14 sized hex nuts) are undergoing brittle failure in initial tightening cycles (fail in the 2nd to 5th tightening cycles). My spec calls for 34-37 HRC and the parts came in at 41-42 HRC, although the...
  2. mrbebu

    Failure Mode of Fastener...

    Hello all, Experienced fastener failures recently and wanted to get some input as to what could've been the cause. Before I give more context and detail, I would just like to see what the trained eyes of this forum have to says solely in regards to the pattern. Pics are of the same...

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