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  1. #1
    editor@glue-it.com's Avatar
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    Case Hardening Compound

    Just thought I would start a thread on this subject to see if I could find any better options:

    I'm currently using this compound from EKP tools:

    Case Hardening Compound-case-hardening-002.jpg

    Case Hardening Compound-img_6238.jpg

    More details and a review here: Case Hardening Compound – glue-it.com

    What other options are there for case hardening?

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    PJs (04-20-2018)

  3. #2
    ChrisB257's Avatar
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    I used to use "Kasenit" but found it no longer available. I landed on this site - https://www.travers.com/1lbcan-1-surface-hardning-compnd-kasenit/p/81-003-001/ - they do suggest an alternate option ( https://www.travers.com/steel-surfac.../p/81-003-201/ ). I saw from the available PDF ( https://www.travers.com/images/art/81-003-001_msds.pdf ) "Kasenit" was Sodium ferrocyanide - yellow prussate of soda! Na4 Fe(CN)6

    Hope this might help.
    Ain't technology great - until it goes wrong!
    The Old Man's Shop

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    PJs (04-20-2018)

  5. #3

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    Chris (@clickspring) has explored this process in his Antikythera build, and got some quite decent hardening with just charcoal, salt and flour: Sounds much less toxic than mucking about sodium ferrocyanate! You DEFINITELY want good ventilation for that!)

    So far I think I'm enjoying his 'Antikythera Fragments' videos about re-inventing and exploring ancient technology as much as the mechanism build itself...

  6. #4
    Toolmaker51's Avatar
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    While compounds for inducing carbon to mild steel have 'modernized', the physical element hasn't. Higher potential heat has deepened it, and service is offered by most any heat-treat plant commercially. But the process is still easily applied with minimal equipment.

    Historically, carburization was done in a fire pit. Parts were packed in bone meal, salt, and leather scraps; then solidly encased in wet clay. After clay dried, the pack was buried in hot embers for several hours, then allowed to air cool before opening.
    Sincerely,
    Toolmaker51
    ...we'll learn more by wandering than searching...

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    Frank S (04-19-2018), PJs (04-20-2018)

  8. #5

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    here in the USA brownells still sells their case harding compound, its just like kasenite,22$ a pound.do u guys have gunsmithing supply shop in UK ? they might carry it..surely some place in france will..

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    PJs (04-20-2018)

  10. #6
    ChrisB257's Avatar
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    Yes, I remember Chris had mentioned his own method - in fact thinking back I seem to remember a mix of charcoal, salt and also - bone meal - was a usable formula. For sure the ferrocyanate does not sound too appealing!

    Ahh - see someone mentioned Brownells - had forgotten that.


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    Last edited by ChrisB257; 04-20-2018 at 08:05 AM. Reason: addition of Brownells
    Ain't technology great - until it goes wrong!
    The Old Man's Shop

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