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  1. Borodog

    Urgent: SN-curve for AISI 4140 Steel needed ASAP

    Thanks, metengr. Unfortunately that's the data I've already had. Since then I've found the AISI's Steel Bar Fatigue Database, which has 4140 data. Unfortunately they only appear to have quenched and tempered data, and I'm unsure if it's appropriate for the material in question (normalized at...
  2. Borodog

    Urgent: SN-curve for AISI 4140 Steel needed ASAP

    Hello all, I have an urgent need to find S-N data on AISI 4140 steel. The data I have does not extend to low enough cycles. Thanks, Mike

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