Edge retention of 8Cr13MoV

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initb2009

Joined
Jul 7, 2009
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I have peeled and sliced a mango,cut cardboard,and done 50 or 60 paper cut tests with the factory edge.It has gotten a little duller but not that much.I carry the Spyderco Tenacious as my EDC because I love my Benchade model 42 Balisong way too much to mess it up.I also can't carry my protech godfather due to iffy state laws about automatic knives (Legal to collect,Illegal to sell or posses unless you are law enforcement or EMS).I'm wondering: How long will it take to dull a 8Cr13MoV blade and how often should I resharpen it? and when it needs resharpening should I use the 30 degree or 40 degree side of the sharpmaker?
 
Honestly, it's up to you. The Tenacious is one of the sharpest factory edge knives I've handled, even after some use, I thought I would strop it on some CrO and it could whittle hair.
The easiest thing to do would be not to let it get dull run it on the Sharpmaker a bit if you think you've been using it a little much. As for 15 or 20 degree edge angles? Entirely up to you. One of the most rewarding parts about collecting my knives has been experimenting with sharpness and edge angles.
 
- 8Cr13MoV has about the same edge retention as AUS8 when both are at the same hardness, a step below that of 154CM and 440C.

- How frequently any knife needs sharpening is dependent on how you use it and how much you use it.

- AUS8 will handle either 30° or 40°. To me, which angle you use depends on what you mostly cut. Thinner if you will mostly be slicing things like cardboard. Thicker for cutting heavy plastic such as when trimming PVC pipe. I use a thicker angle when doing the kind of cutting that puts side pressure on the edge as opposed to straight vertical pressure.
 
I cut through LOTS of cardboard at work over a week withmy Tenacious and while it got duller than factory.. it is still very effectively sharp. I love it!
 
I love my Tenacious I have been carrying it and I can say that there is really no better budget EDC knife out there in my opinion.
 
You cant really put a timeline on when to sharpen it, it all depends on what you use it for. When used very hard my Tenacious required sharpening every 2-3 days. I guess it could have lasted longer but i like my knives shaving sharp. I use the 40 degree side of the sharpmaker.

But as the other members say, sharpen it before it goes dull.
 
my spec.sheet has 6 chinese cut. steels. 1 - three; 3 eight; @2 -nine compositions.8cr13'is most desireable.personaly i like it better than aus8.i have b.m with 9cr13' has 1 percent colbat. cuts better than vg10. 9cr18, i have,not seen yet.
 
I have had a Vex for over three months, haven't sharpened it much yet. It's used on rubber hose, antifreeze boxes, etc. I just keep it off Formica or any hard surface when cutting. I'm sure I've touched it up on croc sticks but that's all.

It's doing quite well - I've had worse American 420 treated by the best in the country. It's a better alloy when done right.
 
What do you guys think about using 8Cr13MoV on longer, cheaper fixed blades? I recently ordered a 7" 8Cr13MoV, SOG Fixation Fusion Bowie for a little less than $30. I looked long and hard at many other fixed blades, specifically SOG's other fixed blades made in AUS8. It's my understanding that AUS8 and 8Cr13MoV perform VERY similarly and frankly I don't buy that just because one is made in China, it is inherently weaker and of lesser quality.
So I guess my question is why would someone pay 2 or 3x for a knife with a nearly identical steel blade (I talking from a perfectly practical user standpoint) that might have a better fit/finish, kydex sheath, and occasionally a slightly higher grade handle material. I mean if you buy a knife like this to USE does the quality of a $60-100 knife really translate to higher performance in the woods?
 
some of our top manafactuers went to china last year;spyderco,b.m. etc. they set up deals with several high quality producers.good guaranty @s thrict quality control.i bought 2 bench made folders 10402-1.steel was 9cr13, 1% cobalt.holds a great edge and tolrances are closer than u.s.a.retail 73$
 
autoopen said:
What do you guys think about using 8Cr13MoV on longer, cheaper fixed blades? I recently ordered a 7" 8Cr13MoV, SOG Fixation Fusion Bowie for a little less than $30. I looked long and hard at many other fixed blades, specifically SOG's other fixed blades made in AUS8. It's my understanding that AUS8 and 8Cr13MoV perform VERY similarly and frankly I don't buy that just because one is made in China, it is inherently weaker and of lesser quality.
So I guess my question is why would someone pay 2 or 3x for a knife with a nearly identical steel blade (I talking from a perfectly practical user standpoint) that might have a better fit/finish, kydex sheath, and occasionally a slightly higher grade handle material. I mean if you buy a knife like this to USE does the quality of a $60-100 knife really translate to higher performance in the woods?
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IF there is a Chinese knife in a design and steel that I can't find in a US model, I am willing to buy the Chinese knife. For instance, both Buck and Spyderco have Chinese-made knives whose designs I can't find in a US-made version.

IF the blade steel is the same and the designs is very similar, I buy American. For instance I won't by a stockman made in China.

YMMV.
 
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