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  1. paras99

    4140 Tempering Curve

    Anywhere between 2 and 72 hours will work. Another thing I forgot to mention was that is the 4140 material air cooled instead of quenched
  2. paras99

    4140 Tempering Curve

    Hi, does anyone know if there is data available for a hardness vs temperature curve for 4140 steel at a certain time. I have been looking everywhere and cant seem to find it. Your help would be much appreciated. thank you Paras

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