why does D2 steel vary so much

On the site it shows 59-61 HRC which is I think an average range for hardened knife blades. I wouldn't hesitate on a BM D2 blade if you like it. I say get it, and don't worry one bit. They say standard (non CPM) D2 takes a crappy edge and holds it forever. It may not be the sharpest edge, but retention is the best. It does get pretty sharp.
 
D-2 is pretty subjective to the maker and heat treating and can be screwed up in the furnace if not handled properly. Buy D-2 based on the reputation of the maker as a general rule. CPM D2 does have some qualities surpassing the old D-2 so I'm told. I have a couple of D-2's and haven't had any problems with either other than they're a bear to sharpen at the outset.
 
65535 said:
On the site it shows 59-61 HRC which is I think an average range for hardened knife blades. I wouldn't hesitate on a BM D2 blade if you like it. I say get it, and don't worry one bit. They say standard (non CPM) D2 takes a crappy edge and holds it forever. It may not be the sharpest edge, but retention is the best. It does get pretty sharp.
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I have tested several Benchmade blades for hardness and they have met Benchmade's spec for that alloy.

If you have the right sharpening equipment, it is possible to get D2 quite sharp.

It does hold an edge a goodly long time.
 
my brother had a long discussion today with Jerry Halfrith.maker in san marcos tx. jerry said the variances in d2 lots has been trouble with his heat treats.does his own treats & said he gets wide variances using the same profile.going to move to 154.i'm assuming he means c.p.m.154.wonder if many of our forum makers have had this problem ?"
 
I have a D2 BM nitrous stryker, plain edge, that was a bit dull out of the box. Not up to Benchmade sharpness standards IMO. I gave it 2 full run-throughs with all my Gatco system stones and it is now razor sharp. It's held that edge for a ridiculously long time.
 
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