M4 v. other steels performance test

Thanks for the heads up. Very cool testing. I mean, it's no car hood stabbing test, but...:D
 
Thanks for sharing. M4 has been my favorite for a while but it looks like something in m390 will make it's way into my pocket sooner rather than later.
 
Cool stuff! When knarfeng and Dennis test things out, I'm always impressed with the results.

Also very impressed with CPM-M4 as it's used in the Spyderco Gayle Bradley folder. It bit me when new (either due to the tip having a slightly thick edge or because it was sick of me bagging on steels with high vanadium content), but after thinning out the edge a wee bit, it's been excellent for both edge retention and the occasional touch-up on a Spyderco Double-Stuff ceramic.

Would like to know if we'll ever see a sprint run of the Gayle Bradley folder in other exotic, powdered steels as well. Or a mid-lock version of the CPM-M4 original.
 
Wow, did actually looked now bit more carefully how Spyderco's M4 perfomed. Wow, I have to say I am quite impressed. My newly found interest is due I paid today my Spyderco Gayle Bradley and I am eagerly waiting it to arrive.

Its my 2nd M4 steel knife. First one being Ritter Mini-RSK in M4 steel. It would be interesting to see how BM's M4 differs from Spyderco's, if at all.
 
thejamppa said:
Wow, did actually looked now bit more carefully how Spyderco's M4 perfomed. Wow, I have to say I am quite impressed. My newly found interest is due I paid today my Spyderco Gayle Bradley and I am eagerly waiting it to arrive.

Its my 2nd M4 steel knife. First one being Ritter Mini-RSK in M4 steel. It would be interesting to see how BM's M4 differs from Spyderco's, if at all.
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The GB blades run several points higher on the Rc scale.
 
JNewell said:
The GB blades run several points higher on the Rc scale.
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Within a couple weeks I'll be able to report the hardness on my Bradley, my 2 M4/Ti Millies, and my Benchmade Rift in M4 (a 50 piece run). I was surprised that the Bradley and ZDP Endura in the test were at 62 RC and not higher, as my M4 Mule and ZDP Endura tested out at 63 RC, and my ZDP Stretch 2 tested at 64-64.5 RC. My Caly Jr. ZDP and Caly 3 ZDP seem at least as hard as the Stretch 2, but with the cladding they can't be tested too readily. I would think that at the higher hardness both CPM M4 and ZDP 189 would have been performed better, but then again the M390 would have done better at 62 RC instead of 60.5 as well. I agree that Spyderco's CPM M4 is harder than Benchmade's, I'd guess at least 2 points difference between the Rift and my Bradley, Millies, and Mule. I am slightly rebevelling one of my Millies on the Edge Pro and it is taking a long time to get all the way to the edge in a couple spots with the 120 grit stone, so it seems to be every bit as hard as the Mule. We'll see, the Rockwell testing machine will let the truth be known.

Mike
 
thejamppa said:
That should affect performance quite bit. Anyway, I am quite impressed by BM's M4 so far, I think I'll be blown away by GB's M4 :D
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Even more so when you consider the street price here in the US (which I hope translates to similar values for you all).
 
gunmike1 said:
Within a couple weeks I'll be able to report the hardness on my Bradley, my 2 M4/Ti Millies, and my Benchmade Rift in M4 (a 50 piece run). I was surprised that the Bradley and ZDP Endura in the test were at 62 RC and not higher, as my M4 Mule and ZDP Endura tested out at 63 RC, and my ZDP Stretch 2 tested at 64-64.5 RC. My Caly Jr. ZDP and Caly 3 ZDP seem at least as hard as the Stretch 2, but with the cladding they can't be tested too readily. I would think that at the higher hardness both CPM M4 and ZDP 189 would have been performed better, but then again the M390 would have done better at 62 RC instead of 60.5 as well. I agree that Spyderco's CPM M4 is harder than Benchmade's, I'd guess at least 2 points difference between the Rift and my Bradley, Millies, and Mule. I am slightly rebevelling one of my Millies on the Edge Pro and it is taking a long time to get all the way to the edge in a couple spots with the 120 grit stone, so it seems to be every bit as hard as the Mule. We'll see, the Rockwell testing machine will let the truth be known.

Mike
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Your results should be very interesting. Just FYI, my Benchmade AFCK M4 tested at 59HRc.
 
Your graph needs a scale, standard deviation and some statistics like t-test.
You can’t tell if the differences are significant without statistics.
 
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