1. BladeForums has ZERO TOLERANCE for extremism or calls of violence. We request your assistance dealing with this as we do not want to see the site shut down due to violent threats. Please see this thread here in Tech Support: https://www.bladeforums.com/threads/bladeforums-has-a-zero-tolerance-policy-towards-threats-of-violence-extremism-be-warned.1769537/

CPM3V vs CPM4V

Discussion in 'Shop Talk - BladeSmith Questions and Answers' started by gsx-rboy750, Oct 7, 2014.

  1. butcher_block

    butcher_block

    Dec 6, 2004
    som steels jsut dont offer enough difference to warrant mass use. some take years to get off the ground and other never make it
    if i was not so locked in on PD1 i woudl for sure try 4v
     
  2. Ankerson

    Ankerson Knife and Computer Geek Gold Member

    Nov 2, 2002
    Yup. :)

    One would have to do something very stupid to hurt 10V (A11) from what I have personally seen in the number of knives I have in it and tested.
     
  3. Gossman Knives

    Gossman Knives Edged Toolmaker Knifemaker / Craftsman / Service Provider

    Apr 9, 2004
    I work with 4V and if I had to choose between 3V and 4V I'd go with 4V. As Darrin said toughness is overrated. I've found 4V has better edge stability then 3V and seems to hold an edge a tad longer. It's tough enough, IMO. If you want more corrosion resistance, then 3V is better at that.
    Scott
     
  4. Ankerson

    Ankerson Knife and Computer Geek Gold Member

    Nov 2, 2002
    Very overrated in knife blades from what I have seen over the years, most of it is marketing and some buy into it blindly. :rolleyes:
     
  5. TennToadsticker

    TennToadsticker

    82
    Jan 5, 2011
    On that note, I am about to send a 12" 3V fixed blade to Paul Bos for heat treatmentand trying to figure out how high to run it so offers the best wear resistance without pushing it too high. Is 61-62 a good target?
     
  6. Ankerson

    Ankerson Knife and Computer Geek Gold Member

    Nov 2, 2002

    What is that knife going to be used for?

    12" blade?

    Or OAL?

    3V can get chippy in the 62 range, it's on the high side....

    Depending on use and geometry, actual HT protocol etc.
     
  7. TennToadsticker

    TennToadsticker

    82
    Jan 5, 2011
    12" OAL, general bushcraft use. It is 3/16" thick. Paul suggests 60, but along line of this discussion I thought perhaps others who know much more about this steel than I do might recommend a slightly higher number. Many thanks for any guidance.
     
  8. Ankerson

    Ankerson Knife and Computer Geek Gold Member

    Nov 2, 2002
    Yeah Paul is right for sure on that.

    3V at ~60 with the high end HT will give very nice edge retention.

    Better than 62 with the low temp HT.... You lose 50% edge retention with the low temp.

    That is were 4V comes into it, 4V at 62+ would be hard to beat, and it's not chippy.

    You can take 4V thinner and harder than 3V in general.
     
  9. TennToadsticker

    TennToadsticker

    82
    Jan 5, 2011
    Great--many thanks, Jim. After what I've read here, I will have to make 4V the subject of my next bushcraft knife project.
     
  10. Ankerson

    Ankerson Knife and Computer Geek Gold Member

    Nov 2, 2002
    You will not regret it. :)

    It will rust quicker than 3V, but the trade off is worth it.
     
  11. Gossman Knives

    Gossman Knives Edged Toolmaker Knifemaker / Craftsman / Service Provider

    Apr 9, 2004
    Marketing can do that. As far as toughness, if that is the main concern, it's hard to beat S7 steel when you want extreme toughness. You do give up wear resistance with S7.
    Scott
     
  12. Gossman Knives

    Gossman Knives Edged Toolmaker Knifemaker / Craftsman / Service Provider

    Apr 9, 2004
    You'll be extremely happy with 4V.
    Scott
     
  13. Ankerson

    Ankerson Knife and Computer Geek Gold Member

    Nov 2, 2002
    Mouth breathers will never know the difference. LOL :D

    Just give them 1/2" thick 1080 with a spring temper and .080" behind the edge.... ROFL


    All they are going to do is pound on it anyway with whatever and through whatever.

    That said, if that's all they want to do with a knife etc then there is plenty of cheap junk on the market they can get like $10 Matchetes from Wallyworld.... Or some fleamarket....

    Personally I wouldn't waste the time and good steel on them, but that is me. ;)
     
    Last edited: Mar 22, 2016
  14. tatalley10

    tatalley10

    57
    Nov 29, 2015
    Where are you buying it from?
     
  15. Ankerson

    Ankerson Knife and Computer Geek Gold Member

    Nov 2, 2002
    You can get it from Alpha Knife Supply or Niagara Specially Metals.
     
  16. bodog

    bodog Banned BANNED

    Dec 15, 2013
    Niagara is expensive, man. Too expensive, really. It's not as good for the price as a number of other steels.

    If you could get it from another distributor for reasonable prices like 3V, then it'd be great.

    Go with 3V class, 10V class, M390, or CPM 154 class until the prices become reasonable. I bought some and it's 50 bucks just for a piece of decently long Blanchard ground steel. 80 bucks for the same piece precision ground. I think I paid like 300 to 400 bucks for two 36 inch long pieces of .187" x 2" bars. It's not worth that much, not unless you have a buyer who is already willing to pay the much higher price for the finished product. But don't get me wrong. It's a great steel that ranges ALOT of functions for knives.
     
    Last edited: Mar 25, 2016
  17. Darrin Sanders

    Darrin Sanders Knifemaker Moderator

    May 6, 2009
    4V is no more expensive than any other CPM steel., you just have to shop around. I won't mention names because I don't wanna get in trouble for deal spotting but I'm looking at a bar of 5/32 x 1.5 x 36 3V for $73.95 and the same bar in 4V is $72.95 so it's actually a buck cheaper. You just gotta look around for the right deal.

    Also, as it gains in popularity there will be more vendors who stock it.
     
  18. tatalley10

    tatalley10

    57
    Nov 29, 2015
    So for knives what are the major advantages?
     
  19. shqxk

    shqxk

    Mar 26, 2012
    I'm not sure what do you mean on the 60rc high end HT and 62 low temp HT?
     
  20. Ankerson

    Ankerson Knife and Computer Geek Gold Member

    Nov 2, 2002
    Low temp tempering..... Under the recommended 800F to 1000F.....

    Tempering at 400F to 500F.

    One might gain toughness, but it kills edge retention.
     

Share This Page