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Posts: 79

Location: United States Conyers, Georgia
Occupation: computer programmer
Age: 64
#1112   2018-01-27 01:51          
That was my understanding before this demo. But after the 3 round of normalizing, the O-1 was harder than 65c Rockwell. And Mark pointed made clear that normalizing does not impact hardness, just grain size. (Besides, he didn't go though a hardening cycle before tempering)
Jim Guy
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