Cpm m4 at 61 hrc?

Discussion in 'Knife Reviews & Testing' started by White Warrior, May 6, 2018.

  1. White Warrior

    White Warrior

    Mar 17, 2018
    Hello all, this is my very first original post here. I am in the market for a bravo 1 or custom model with the same design. The brk Bravo 1 in cpm m4 is calling to me, as well as the one in cpm cruwear. Bark river aims for 61 hrc (60-62) with their m4, while their cruwear is at about 62 (61-63 I believe). Now I know m4 would USUALLY claim the edge retention category, but I'm quite curious if any Smiths or owners here have ever ran cpm m4 at this low of hardness. I'm curious if it will STILL hold an edge better than the cpm cruwear, at these hardnesses. This thread pertains to edge retention only, and hopefully we can get some info to the buyer(s) on this subject. Yes I know brks reputation problems blah blah blah, save it please. The amount of info on bark rivers cpm m4 is basically non existent, so here I am asking. The specific information on these steels at these hardnesses is also (for me) proving elusive. Im not a fanboy, dont even own one yet. So any actual help on the subject would be hugely appreciated. If you do have an issue with brk, but do have knowledge on this steel at this hardness, just comment on the steel stock/dimensions and act like we're talking about your favorite brand lol, thanks everyone.
  2. Alberta Ed

    Alberta Ed

    Jun 29, 1999
    I'm not sure a point or two hrc would make any significant difference; probably blade geometry would be just as significant. Mike Stewart at Bark River knows his steels, speaking from my own experience with his blades (A2, 52100), so I would have no concern about either steel.
  3. AmosPaul

    AmosPaul Gold Member Gold Member

    Dec 17, 2014
    Not to quibble, but actually a point or two of HRC would make a significant difference. The HRC is not a linear scale, it is exponential, so a change of a point or two is a big change.
  4. Alberta Ed

    Alberta Ed

    Jun 29, 1999
    Thanks, I wasn't aware of that. (Note to self: do research...:oops:)
    AmosPaul likes this.
  5. mete


    Jun 10, 2003
    Yes two points difference in hardness can be felt when you work with the knife. That's where a custom HT is asked for
  6. arty


    Oct 18, 2003
    I have a Benchmade mini Grip at a lower hardness for M4. The knife held an edge forever when I used it during an interstate move. It went through loads of cord and tape. This was excellent performance, at a time when I didn't have access to sharpening stones.
    jeepin and White Warrior like this.

Share This Page