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Thanks so much for your explanation, Kevin! I hope you won't mind, but could you define the terms, AC1, AC3, and AcCM? Just beginning to understand the chemistry behind the heat treat process. I'm trying to better understand your last paragraph. You say that stress relief could be applied anywhere fro 1150 F to 1250 F, then seem to say you would not recommend cycles for grain refinement below 1400 F.
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