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  1. #1
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    Default toughest steel

    maybe this is the right place to post this question
    I am trying to figure out what is one of the toughest or strongest steels out there with out heat treating it
    trying to make a punch and die to press some parts but the material has to be very strong . (steel)
    I was thinking of D2 steel.
    does any one have a good strong steel that they would recommend ?
    I am going to be pressing some SST .040 thick.
    any info would be greatly appreciated
    thank you

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  2. #2
    Community Moderator Jim Dawson's Avatar
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    Default Re: toughest steel

    D2 would be fine, but to be useful would need to be heat treated, it's pretty soft in the annealed condition. Is this going to be a punching or forming operation?

    Jim Dawson
    Sandy, Oregon, USA


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    Default Re: toughest steel

    It's going to be forming
    So basically what I was thinking is machine my punch to the size it needs to be then send it to get it anneal to (get harden )
    Then just polish up.
    I am just concern about dimension. Are the going to get bigger or smaller
    Also is there a way I can harden it myself or does a special shop need to do this
    Thank you for the replie



  4. #4
    Community Moderator Jim Dawson's Avatar
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    Default Re: toughest steel

    A6 might be a better choice for forming dies, much more forgiving to machine than D2. Harden and draw back to about a R56-58C, unless you are coining the material then D2 or S7 would be the better choice. In that case, you would want to harden to about R60-62C. To harden and draw correctly takes special heat treat ovens, possible to do in the home shop but best results would be obtained from a heat treat shop if you don't have experience at doing it.

    D2 tends to grow very slightly when heat treated, maybe 0.0005/inch of thickness. A2 and A6 is normally very stable in heat treat. Of the tool steels I mentioned above, D2 is the most abrasion resistant due to it high chrome content.

    Jim Dawson
    Sandy, Oregon, USA


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    Default Re: toughest steel

    Thank you
    I think I will be trying the d2 and like you said harden to R60-62c
    Thank you



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