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  • Users: defogman
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  1. defogman

    Calculating section thickness for heat treat.

    Could someone direct me to resource to determine effective thickness of various geometric shapes?Currently we have alloy steel tubing 8" OD 2"ID x 20" long to quench&temper.Does it matter if the parts are processed laying down or stood up?Parts are rough machined so distortion not an issue.I...
  2. defogman

    Rapid hardness drop when tempering martensitic SS

    I find that Rc hardness drops rapidly when tempering 400 series SS between 950-1000 deg f.Why does this happen and how can it be avoided?A typical example is 416ss oil hardened from 1750f .15%C atmosphere requiring 37-41 Rc.1st temper @ 600f results in high hardness.2nd temper 2 hr @ 960f high...

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