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  • Users: bhollands
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  1. bhollands

    Spectrometer

    We are looking to replace our aging spectrometer (spectro OES) and before just blindly buying the latest spectro model I would see what else is out there. I thought this would be the perfect place to get some opinions from those who actually use different models on a daily basis. We are a steel...
  2. bhollands

    CD3MN weld ferrite

    I am having difficulty achieving a ferrite above the 35% minimum as required in NACE MRO 103. I am using E2209-16 rod and solution annealing the weld at 2150°F. The last test I did had a ferrite of 35% in the cap but only 30% in the midweld. I am restricting the interpass temperature to 300°F do...
  3. bhollands

    Verification of Charpy impact notch profile

    We break charpy "v" notch impact specimens. As part of the verification we check the notch profile on an optical comparator using an overlay that shows the allowable tolerance. The overlay is a gauge and therefore must be calibrated in some way, but I do not know how to have it done. Does anyone...

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