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  1. Lampropeltis

    PWHT ASTM A516 gr70 - why 1305°F if there is low carbon content?

    I am having a bit of a problem getting an exact answer from our PWHT Vendor on bringing some 516 gr70 up past 1340°F/1305°F (1340 is max allowable before the carbon transforms, 1305 is a safety factor) I understand his logic, that embrittlement will occur as the carbon content shifts to...
  2. Lampropeltis

    X70 vs. 516-g70n (normalized) for pressure vessel

    I would like an opinion (or better) on whether or not 516-70n (normalized) is a suitable material replacement for API5LX70 (X70) for construction of a pressure vessel - giving consideration to modulus, ksi, etc of both materials (I believe they are similar enough). vessel design criteria is as...

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