1. Are you a current member with account or password issues?

    Please visit following page for more information

    Dismiss Notice

cpm154 and 154cm - different name, same steel?

Discussion in 'Knives' started by adimag, Feb 19, 2008.

  1. adimag

    adimag Loaded Pockets

    Joined:
    May 26, 2007
    Messages:
    481
    Likes Received:
    227
    OK, this is for the knife people who know their steels. I have a benchmite 310 in 154cm and a steel mini keyton in cpm154. Are they made from the same steel or is there a difference between them? If I had to guess, I would say they are the same with different names, but then I am no expert. Can anyone help clear this up?

    THANKS!!!
     
  2. LZ

    LZ Loaded Pockets

    Joined:
    Apr 11, 2007
    Messages:
    3,429
    Likes Received:
    5
    I have always assumed they are the same steel, perhaps different manufacturers names. Either way, still my favorite steel out there by a long shot!
     
  3. Lugsalot

    Lugsalot EDC Junkie!!!!!

    Joined:
    Aug 8, 2006
    Messages:
    6,447
    Likes Received:
    41
    Here's a BladeForums thread on the topic. I recall that CPM154 and 154CM are indeed two different steels, and that their similar names are the cause of some confusion, but I'll be darned if I can tell you how they're different. The BF guys can help you with that bit. :)
     
  4. chmsam

    chmsam Loaded Pockets

    Joined:
    May 28, 2007
    Messages:
    1,411
    Likes Received:
    4,427
    If I understand it correctly, CPM's are powdered metals and should outperform CM's. While they are apparently close, I would think (but do not know for sure) that CPM154 would have an advantage over 154CM. However, that's only one part of the equation. Any knife not properly made and/or not properly heat treated will never perform well. Knife making is complicated stuff if you want to make a quality blade.
     
  5. TKC

    TKC Loaded Pockets

    Joined:
    Apr 14, 2006
    Messages:
    5,490
    Likes Received:
    1,354
    I was just going to comment too that CPM are Crucible Powdered Metal, and ARE different than CM's.
     
  6. adimag

    adimag Loaded Pockets

    Joined:
    May 26, 2007
    Messages:
    481
    Likes Received:
    227
    Thanks for all of the comments!! It seems that they are different steels. The simliar names do make it hard to see the difference. The benchmite 310 in 154cm is my favorite knife right now and I love the performance of the steel.

    Thanks again!!
     
  7. Joe Talmadge

    Joe Talmadge Loaded Pockets

    Joined:
    Apr 21, 2006
    Messages:
    182
    Likes Received:
    2
    Same makeup, different manufacturing process -- 154cm is a traditional ingot steel, cpm154 is a particle metallurgy steel.
     
  8. FK

    FK Loaded Pockets

    Joined:
    Feb 19, 2008
    Messages:
    20
    Likes Received:
    35
    The Crucible steel 154CM is from the 1970's, it was originally used for jet engine components. Bob Loveless popularized the steel for custom knives but the custom makers used very small quantites of the minimum "heat" for alloy production.

    When Crucible dropped the steel in favor of newer jet engine alloys,,,,,Bob Loveless went the Hitachi Metals Div. in CA and described what he wanted,,,,,,Hitachi made up the alloy ATS-34 which was almost identical to 154CM but was cleaner with the new steelmaking equiipment in Japan. Cleaner steel = less impurities.

    In the late 1990's Cricuble again became interested in custom steels for the knife industry and introduced CPM 154 with similar alloy content but with a far different process to produce the steel, Crucible Powdered Metal is a cleaner method for small quantities.

    Are they the same alloy,,,,,,on paper yes,,,, in the world of metallurgy,,,,,no.
    Can the average knife user tell the difference = no.

    Regards,
    FK
     
  9. souptree

    souptree Loaded Pockets

    Joined:
    Oct 6, 2006
    Messages:
    1,024
    Likes Received:
    0
    What an interesting and informative first post! O0

    :welcome:
     
  10. adimag

    adimag Loaded Pockets

    Joined:
    May 26, 2007
    Messages:
    481
    Likes Received:
    227
    Thanks Joe and FK! That answers a lot of the questions I had about the steels.
     
  11. Codeman

    Codeman Loaded Pockets

    Joined:
    Apr 13, 2006
    Messages:
    5,037
    Likes Received:
    47
    Welcome to EDCF, FK!
     
  12. Lugsalot

    Lugsalot EDC Junkie!!!!!

    Joined:
    Aug 8, 2006
    Messages:
    6,447
    Likes Received:
    41
    Welcome to EDCF, FK! :highfive:

    Sometimes it's too easy to forget that there's more to a good knife than the alloy of steel used. Without proper heat treating and blade geometry, the "best" alloy won't perform well at all!
     
  13. carrot

    carrot Loaded Pockets

    Joined:
    Apr 1, 2012
    Messages:
    300
    Likes Received:
    401
    Welcome to EDCF, FK.