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Thread: hardening mild for gas check molds

  1. #1

    hardening mild for gas check molds

    I recently read someone asking for a "brine recipe" for hardening mild ie 1018 or a36.
    we call it superquench in the smithing world
    heres the recipe

    4.5 (ish) gal of water
    1 lb bag of salt
    1 reg sized bottle of Dawn dish soap
    1 lil bottle of jet dry
    mix em all up.
    i recommend the salt first
    the principle behind this stuff is as follows
    the salt raises the boiling point
    the dishsoap cuts down on cavitation and water jacketing
    the jet dry breaks surface tension down a tad
    great stuff, but get a lid, it can be messy

  2. #2
    Boolit Buddy dimaprok's Avatar
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    Mar 2017
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    I don't get it, is this for hardening gas check maker? How does it work?

  3. #3
    Boolit Buddy
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    My son in law says 1018 or A36 is steel designations. Guess this is for hardening mild steel to make a mold? Or as dima said to make a check maker? Reddog give us a clue.

  4. #4
    Boolit Master
    NoZombies's Avatar
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    1018 and A36 are types of mild steel. 1018 is a designation for a mild steel of specific chemistry. A36 is a specification for certain properties, without any specifically required chemistry. 1018 is more predictable than A36, as A36 chemistry can be all over the place as long as it's physical properties meet certain minimum requirements.

    "Superquench" has been around for a while, but the recipe has changed over time, I remember when it called for Shaklee Basic as the surfactant of choice... The idea is to quench a low carbon steel quickly enough to allow the little bit of carbon it contains to actually impart some hardness to the alloy. I would be wary of using superquench on something like a gas check making die, as I never had good luck with dimensional stability when using it. At the very least, i would make everything undersize, and do the final ream and polish after the 'quench'.

    Good luck.
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BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
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