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Old 03-26-2013, 03:10 PM
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welding question

I have a question about welding. I was wondering If you can weld on cast steel,there is a diffrence between cast seel and cast Iron. Maybe you could Tig weld with a special filler rod,I need to weld a bracket on my steering box. Any comments would be great

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Old 03-26-2013, 04:15 PM
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Heat up what your welding and use nirod
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Old 03-26-2013, 04:59 PM
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Cast steel is very different than cast iron, cast steel can be welded with 7018/ ER71T (gas shielded flux core)/ E70S-6 (tig rod or mig wire). Cast iron must be welded with Ni-CI with pre/post heat and let it cool down as slow as possible with a welding blanket because it will break again.

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Old 03-29-2013, 08:24 AM
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You can tig some pretty strange stuff also if you just use stainless filler rod, just watch close for little cracks. My favorite when I'm not sure is to try it on a similar part that doesn't matter, then "destructive test". If you can beat the crap out of it with a hammer and the weld (or surrounding material) doesn't break (i.e. your tab or whatever should bend over before it breaks off), you're probably good with the real part. If it fails, you're back to doing more research.
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Old 03-29-2013, 05:43 PM
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Quote:
Originally Posted by kso View Post
You can tig some pretty strange stuff also if you just use stainless filler rod, just watch close for little cracks. My favorite when I'm not sure is to try it on a similar part that doesn't matter, then "destructive test". If you can beat the crap out of it with a hammer and the weld (or surrounding material) doesn't break (i.e. your tab or whatever should bend over before it breaks off), you're probably good with the real part. If it fails, you're back to doing more research.
If the part is cast iron I wouldn't recommend a "stainless" unless it is a certanium 707t (which is designed for dissimilar metals). I have used Silica Bronze (ac is the perfered method) tig rod before to fix cast and have had great results but the NICL (SMAW) which I recommened in an earlier post.
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