Tig Welding Tool steel
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  1. #1

    Tig Welding Tool steel

    What is the best rod for tig welding two pieces of 3/8 tool steel together ( butt joint) ?

  2. #2
    Join Date
    Nov 2005
    Location
    Santa Fe, NM
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    1,708

    Re: Tig Welding Tool steel

    To start with it would be best to know what the tool steel alloy is. Do the weld properties need to closely match those of the base material, or would a ductile weld perhaps be better for the application? Is the tool steel already heat treated (hardened) or will it be welded in the annealed conditon?

  3. #3
    Join Date
    May 2010
    Location
    ct.
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    437

    Re: Tig Welding Tool steel

    I worked at a shop that made injection molds and stamping dies ,s7 and d2 tool steels etc, all heat treated.There was a weldor who would repair them (build up worn areas for machining etc.)He had filler rod that matched each type of tool steel(s7,d2,o1,a?) Had to be retempered after welding.Welding was kind of a last ditch effort to save the tool, or a temporary fix while new tool could be built.
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  4. #4

    Re: Tig Welding Tool steel

    Quote Originally Posted by pulser View Post
    To start with it would be best to know what the tool steel alloy is. Do the weld properties need to closely match those of the base material, or would a ductile weld perhaps be better for the application? Is the tool steel already heat treated (hardened) or will it be welded in the annealed conditon?
    01 tool steel / not heat treated

  5. #5
    Join Date
    Apr 2010
    Location
    Galesburg, il USA
    Posts
    1,649

    Re: Tig Welding Tool steel

    Google "weld mold 935", for tig 935-T = AISI O1.

    Praxair used to keep some weld mold tig rod at distribution centers. You would do well if you called the maker to discuss your particular purpose for complete instructions.

    Stoody also has AISI O1, but I can't remember if they have cut rod.

    Matt

  6. #6
    Join Date
    Oct 2007
    Location
    Yuba City, CA
    Posts
    1,528

    Re: Tig Welding Tool steel

    Quote Originally Posted by Uncle Hemi View Post
    01 tool steel / not heat treated
    Be aware that regardless of the filler used, the weld and heat
    affected zone (HAZ) of the parent material will show significant
    increase in hardness after welding, even with air cool-no quench.
    ....been there & dun that.
    Blackbird

    Fat Bastard for President-2016

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