Can’t wait for new Spyderco K390 series

Discussion in 'General Knife Discussion' started by DocT, Jul 26, 2020.

  1. DocT

    DocT

    Mar 25, 2012
    I am pumped. Spyderco is about to release affordable knives in K390. This is my favorite non stainless steel by far, and one of my top favorites overall. The entire Seki lineup is getting it. I am waiting on the Endura, but want it yesterday.
     
    sliceofaloha, marrenmiller and mb> like this.
  2. lieferung

    lieferung

    May 24, 2016
    Same, I really love my PM2 in K390. Can't wait for an Endura or maybe a Delica
     
  3. trevitrace

    trevitrace Gold Member Gold Member

    Jul 21, 2013
    Hoping they offer the endela in it. Otherwise I'm definitely in for a delica.
     
    Lee D likes this.
  4. cabfrank

    cabfrank

    461
    Jun 21, 2010
    Okay, I know I can look this stuff up, but, in a nutshell, what excites you about Seki K390? I only ask because I am a big Seki H1 Salt fan. I assume this is very opposite, and it must have some really good qualities.
     
  5. patrickguignot

    patrickguignot

    262
    Sep 10, 2015
    Where can I find this info?
    And do you know if the blades are satin or DLC coated?
     
  6. lieferung

    lieferung

    May 24, 2016
    Google Spyderco K390, there is plenty of talk about the steel in previous models.

    Check the most recent Reveal. They are satin AFAIK.
     
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  7. Ippon98

    Ippon98

    85
    Feb 15, 2017
    The delica isn't for me, but the endela or stretch would be cool to see. My K390 PM2 is awesome; this has potential to be a really cool lineup.
     
  8. gazz98

    gazz98 Gold Member Gold Member

    Sep 3, 2008
    Oof. I've never had a K390 knife. I didn't need to read this thread. I just bought a Hap 40/SUS 410 Endura off the exchange. I guess my Delica, Endela, and Endura collection will continue to grow....
     
    Last edited: Jul 27, 2020
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  9. Eli Chaps

    Eli Chaps Gold Member Gold Member Basic Member

    Apr 20, 2018
    Well, the Dragonfly 2 in K390 is a hundred bucks. One of my favorite knives but for an additional $30+? No thanks.
     
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  10. dirc

    dirc

    Jan 31, 2018
    k390 has 2.5% carbon, and a whopping 9% vanadium... which should be an amazing steel for edge retention, but at the cost of extreme chippyness
    http://www.zknives.com/knives/steels/steelgraph.php?nm=k390

    personally, I won't be getting anything with this steel, I expect it's toughness might be similar to maxamet (which has 2.15% carbon) ... however it's 'supposed' to be slightly tougher than m390. I won't believe that, until @Larrin says so after testing ; )

    m390 sits at about 5 ft lbs, while maxamet is around 2.5 ft lbs... both are too low (imho)

    for now, cpm-m4 (with toughness of 15 ft lbs) is my edge retention top steel
    but I'll enjoy reading stories about k390 steel when people on bf have tested many examples :)
     
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  11. marrenmiller

    marrenmiller Basic Member Basic Member

    Apr 6, 2017
    You might want to watch this, then. There are a lot of people thinking that fracture toughness is the same thing as resistance to damage. Extreme strength of A11 class steels allows for high edge stability, and can allow those steels to shrug off damage that might damage tougher steels.

     
  12. marrenmiller

    marrenmiller Basic Member Basic Member

    Apr 6, 2017
    Other interesting demonstrations of high strength steels. This is why a lot of people, myself included, really like A11/K390/Maxamet type steels. For use as a cutting tool, I believe they're superior to M4.

     
    Last edited: Jul 27, 2020
  13. K390 is supposed to be an upgrade of 10V, keeping the absurdly high edge retention while adding more toughness. In @Larrin's edge retention testing, it did slightly better than ZDP-189 at a lower hardness. ZDP-189 is probably the most appropriate comparison, since it's another high alloy non-stainless steel that focuses on superior edge retention.
     
  14. AF

    AF Gold Member Gold Member

    Jan 14, 2000
    In for a Dragonfly and Manbug! Shouldn't be long now. Interestingly the Ladybug K390 was released several weeks ago.
     
  15. sliceofaloha

    sliceofaloha Gold Member Gold Member

    607
    Oct 4, 2018
    I've had my K390 Endura(s) preorder in since the end of the first week of May. Let the waiting be done.
     
  16. DocT

    DocT

    Mar 25, 2012
    I think the Reveal has this information, but it has been discussed on the Spyderco subforum, here, and on the Spyderco forum. It is very exciting. The Endura, Delica, and Dragonfly are going to drop any time now.
     
  17. DocT

    DocT

    Mar 25, 2012
    I generally like the way tool steels behave. This is a tool steel on steroids. It holds an edge for a very, very long time. It is a lot harder to sharpen than most carbon steels, but it is not as bad as many high end stainless steels. It is also can take a very nice thin edge for slicing without failing. This steel makes M4 class steels obsolete.
     
    Last edited: Jul 28, 2020
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  18. DocT

    DocT

    Mar 25, 2012
    It is not in the least chippy, not even remotely. Larrin has addressed this steel in several articles, either directly or indirectly. It is tougher than Maxamet.
     
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  19. patrickguignot

    patrickguignot

    262
    Sep 10, 2015
    I haven't seen any toughness test of K390 in Larrin's website. In fact, in his article about the edge retention of 48 steels he wrote :

    >>>I have tested the toughness for all but 7 of the steels: Z-Max, BD1N, K390, S125V, S90V, S60V, and Vanadis 8.

    So we don't know what is the real toughness of K390. All we have are the values displayed on Bohler site.
    In his article about How to Pick the Best Steel for Every Knife Larrin seems skeptical about the toughness claims of Bohler. He wrote:

    >>>There are a few different 10V replacements including Bohler K390 and Uddeholm Vanadis 8, those steels are more expensive but they are advertised as having superior toughness. If future toughness testing confirms superior properties of K390 or Vanadis 8 I may change my recommendation.
     
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  20. The Ladybug was announced earlier than the rest (Reveal 4 early in the year, rest were in Reveal 5).


    Having watched BigBrownBear's testing of edge stability of M4 vs. K390 using brass rod, I don't think it's unreasonable to say that K390 is decently tough.

    I interpreted @Larrin's recommendation to be based on a value proposition, where 10V is substantially less expensive than the replacement versions, so he wants to quantify the improvement against the increase in cost. That value proposition only really comes into play when you've got the option between 10V and one of the replacement/improvement versions. For the knives that Spyderco will offer regular-production K390 versions, you don't have a 10V option (for several of them, this will be the first non-Japanese steel they're offered in). Compared to your regular production options of VG10, ZDP-189, and H1 (depending on whether you count the Salt as a variant or distinct model), K390 has definite advantages over ZDP at essentially the same retail price.
     
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