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Thread: Help welding cast steel

  1. #16
    Senior Member
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    Jul 2011
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    Perth Western australia
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    If it cracked along the weld I would say its cast iron,not cast steel. Completely different welding procedure and consumables. Cast steel is generally grinding a weld prep and welding with a low hydrogen of S6 wire after a preheat. Cast iron is a completely different creature and I would be bronzing it or using a nickel rod or wire.
    Any welding rod or wire with iron in it is going to have issues in the long term. Best of all is find someone who specialises in welding cast iron and has a furnace and can heat the whole thing red and fusion weld it with cast iron rods.

  2. #17
    Junior Member
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    Jun 2016
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    Australia
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    pics

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  3. #18
    Senior Member
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    Oct 2014
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    Canada
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    Some of the weld looks decent but in the bottom pic looks like some of it is just piled on top of the piece which might indicate is some type of cast iron. Preheated cast steel, the weld should wet out on the sides like normal steel. The weld piled up like that creates a notch effect at the edge that can cause cracking. Did you do a spark test or see if it would cut with a cutting torch?

  4. #19
    Senior Member
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    Sep 2016
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    usa
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    Quote Originally Posted by fast_st View Post
    Once you take that tag off you're good to go!
    LOL...sshhhhhhhhh....I done that once, or maybe twice....

  5. #20
    Senior Member
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    Sep 2016
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    usa
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    time to make a camp fire and throw that chunk of metal in it, and when it gets a nice glow to it, weld the crap out of it and throw it back in the fire with some more wood and let it burn out overnite..if it still cracks, put in scrap pile and buy a replacement...putting in the fire will burn off any contaminating oil and junk, also peen the welds, and the slow cooling of overnite should be slow enough to prevent cracks, if it still does then its a mix of metal thats not weldable.. I know the feeling to want to fix and not spend $$$$, but if it fails when your using it, what will be the cost and liability to you??

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