Mete,
I ran across a tech note suggesting D2 should not be tempered lower than 900 - 960 F. The sheet's accompaning table indicates it secondary hardening at that tempering range (targeting 58 - 60 HRc); as the tempering goes from 400 F to 900 F the hardness drops and comes back up at about 900 F. I have been tempering D2 at about 400 F, targeting about 60 - 61 HRc. Can you advise about this and suggest it better not for our D2 knife blades be tempered at the lower ranges or are we okay at tempering lower than 900 F??
Thanks.
RL
I ran across a tech note suggesting D2 should not be tempered lower than 900 - 960 F. The sheet's accompaning table indicates it secondary hardening at that tempering range (targeting 58 - 60 HRc); as the tempering goes from 400 F to 900 F the hardness drops and comes back up at about 900 F. I have been tempering D2 at about 400 F, targeting about 60 - 61 HRc. Can you advise about this and suggest it better not for our D2 knife blades be tempered at the lower ranges or are we okay at tempering lower than 900 F??
Thanks.
RL