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Reading surface colorization from heat is not a very accurate way to determine much. Different steels react differently. With 80crv2, 400 is good ballpark temp to start testing results.
If the edge flexed and did not crack but came back to straight, you should be ok. Yes, sharpen and cut different things like cardboard, shave some wood, etc. - all the things you would normally do with a blade. If it dulls quickly you can redo the hardening quench with this steel and try again on the temper draw at a lower temp.
Just remember most try to achieve a flexible blade on fillet knives. A lot of that has to do with distal taper geometry.
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Carl Rechsteiner, Bladesmith
Georgia Custom Knifemakers Guild, Charter Member
Knifemakers Guild, voting member
Registered Master Artist - GA Council for the Arts
C Rex Custom Knives
Blade Show Table 6-H
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