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"Key steel", should I harden it?

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  • "Key steel", should I harden it?

    I can buy 'key steel' in convenient sizes and I am wondering if this
    is suitable for making these tool holders..

    It is bright drawn steel bars (and I dont have to leave town to buy it)
    the composition is:

    C Mn C Mn
    0.45% 0.6-1.0% 0.42/0.5% max 0.50-0.80%

    It is of course easy to machine and I assume the carbon content means it can be hardened somewhat.

    The question is, should I harden it or use it as is?

  • #2
    Any steel makes a good toolholder, its all got the same overall rigidity.

    Soft steels might bend in a tool crash and the insert/tool pocket might wear a little, but otherwise they are fine.
    Play Brutal Nature, Black Moons free to play highly realistic voxel sandbox game.


    • #3
      key stock

      I have used thid for tool holders and whatnot...I usually harden it the same as lc steell.Kasenite works the best...cheers


      • #4
        I wouldnt bother as your usage wouldnt warrant it , unless you are going to use a particular holder a lot or heavily cut for long periods .
        I have made a couple lately and unless I stuff up and push the cutter into the chuck they dont show any signs of wear yet and they are about three years old now.