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  1. Bruce62

    17-7PH Cooling Rates

    I am having trouble getting to the TH1050 condition. I am following a Boeing spec and the end results call for 40<HRC<43. Austenizing at 1400F for 90 minutes and cooling at 15 psig, placing in water at 55F for 30 minutes, yields a HRC=~29. But when we go to ageing at 1050F for 90 minutes, we...

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