Edge angles, you have nothing to worry about

Cobalt

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Dec 23, 1998
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I wanted to test a media that would cause a lot of damage within a short period of time. So I have these large metal spikes used to stake equipment in the ground to. I first tested the metal spikes with a bread knife. The spike won. It made a perfect C-notch in the bread knife 3/8" diameter thick. So the spike is certainly tough. So I wanted to see what would happen if I just wailed on cpm3v and INFI. I wanted to try to snap these blades in half if they would propagate a crack. Neither would fail. A testament to excellent heat treat. My only reason for posting this is to show that if you are just chopping wood, you can easily do 14 to 15 dps per side with INFI and it will take it no problem. I would say you would have no issue with cpm3V at 14 to 15 dps either. The thick edges are only needed if you plan on cutting 3/8" thick cement nails like an idiot:barf: Also, when hammering there are way to many variables to say that one steel did better than the other. So this is not a comparison, just to show that these steels can take tons of abuse that no wood could ever heap on them. I would not even think less of the ka-bar as this test was beyond abusive.

1st - Carothers CPM3V super HT, 18 dps. At 0.2" the cpm3Vs is 0.073" thick. I hammered on this one for 3 minutes total with the mallet and 4 minutes total with the hammer. The deepest impaction on this 3V was 0.115" depth.


2nd - Busse Leaner Meaner ground down to a 14dps edge. At 0.2" from the edge the Busse is 0.070" thick. I hit it for about 2 minutes with the mallet and 5 minutes with the hammer. The deepest impaction on the edge of the Busse was 0.080" depth.


3rd - Ka-Bar Warsword of 1095 crovan, with factory edge. Thicker then the other two by a good margin. I hammered on this one for about a minute at first. Took a pic of the damage and then continued hammering. At 1 min 40 something seconds it broke in two. The edge damage was considerably more at the one minute mark than the other two after nearly 7 minutes. About 0.155" depth before it let go.


test1.jpg


warsword
MC7NCjS.jpg


JQm2bg4.jpg
 
Really cool post!

The Leaner Meaner did admirably and took the least damage.
I think Nathan hardens most of his 3V to 61 doesn't he? so the cpm3 might have done better at a rockwell of 58 in a metal on metal scenario like this.
 
Carothers edc I presume? You animal. Thanks for doing this so I don't have to.

It's not a Carother's. It's a Survive knife. I think he just means the heat treat, which he should of just said Delta 3v. Anyway, I'm not sure that Survive knife has that heat treatment or just regular 3v heat treat
 
It's not a Carother's. It's a Survive knife. I think he just means the heat treat, which he should of just said Delta 3v. Anyway, I'm not sure that Survive knife has that heat treatment or just regular 3v heat treat

Survive knives will be using D3V for all new models after and including the 4.1 But I think there is only 1 out in the public with D3V with them so far. Aside that, no survive knife (so far) has the new protocol. So this must be regular 3V if its Survive knife (which i agree, it isn't a Carothers)
 
I could be wrong, but if I remember correctly, this was a pre-production "Delta 3v" Survive blade that made its way to Cobalt shortly after the new heat treatment was dialed in. So even though it is a Survive blade, it did have the latest heat treat for 3v.

The performance on both the 3v and the infi both look great. Very impressive.
 
I could be wrong, but if I remember correctly, this was a pre-production "Delta 3v" Survive blade that made its way to Cobalt shortly after the new heat treatment was dialed in. So even though it is a Survive blade, it did have the latest heat treat for 3v.

The performance on both the 3v and the infi both look great. Very impressive.

Oh fair! My mistake!
 
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