temper
Yes, I also thought 375 sounded pretty low for 1084. I would start no lower than 400 and probably wind up somewhere between 415-425. But this all depends on individual shops and equipment, as quenched hardness of the steel, etc.
One more comment, regardless of the temperature one chooses, there is no harm and very much potential good that will come from tempering three separate times for 1.5 to 2 hours per time.
John
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John Frankl
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