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  1. 9two5

    Convert Knoop to Vickers

    Does anyone know the formula for converting knoop to vickers. I am using a 500 gram load. I have charts, but they are not complete. Thanks in advance.
  2. 9two5

    Hydrogen Embrittlement

    We are having problems with 4350 quenched and tempered parts failing an endurance test. The failures are linked to hydrogen damage at the site of large inclusions, app. one eight of an inch below the surface. The mill that produced the material has claimed that we induced the hydrogen into the...

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