Farm Equipment - Welding Cast Iron

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Welding Cast Iron

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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=28532
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Topic: Welding Cast Iron

Posted By: Anthony
Subject: Welding Cast Iron
Date Posted: 04 Apr 2011 at 2:26pm

Can anyone weld a couple cast iron legs from an old wood burning stove...I can send you the legs and of course pay.........thanks Anthony

Replies:

Posted By: junkman
Date Posted: 04 Apr 2011 at 2:53pm

Find someone with a wire welder. I have welded up holes in manifolds and welded brackets made out of cast with one. just prep it good and weld at short intervals. works just fine for me. Mark

Posted By: Coke-in-MN
Date Posted: 04 Apr 2011 at 3:16pm

Old cast can be welded and should be someone lacal that can do it .. In some cases it might need to be brazes if ornate or odd shaped where stick weld would be hard to do.

One problem is weld is going to show as the rod has a high nickle content and will look brighter than base metal. Depending on the alloy or cast SS rod works or i have had good results using Allstate #8 welding rod.

Check with welding supply house for the Allstate guide for cast rod.

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."

Posted By: allis restorer
Date Posted: 04 Apr 2011 at 3:19pm

Stainless steel Tig welding works good also with cast, or a good nickle rod also works well, just make sure you preheat the cast before welding it. Steve

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Go orange or Go home!!

Posted By: Burgie
Date Posted: 04 Apr 2011 at 5:03pm

I always use nickel rod.

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"Burgie"

Posted By: swit
Date Posted: 04 Apr 2011 at 6:02pm

i have taken nickel rod chipped all the flux off of it then tig welded it works really well an old timer showed me that trick the results are great holds up really well also

Posted By: TMiller/NC
Date Posted: 04 Apr 2011 at 7:40pm

Years ago we used a rod made of cast iron coated with flux. It was 1/8" square about 36" long, have not seen any in several years. Used an acetylene torch to preheat the cast part then heated joint to a puddle to add filler rod almost like welding steel with torch. The repair was of about the same color as the part being repaired. Tim

Posted By: Alberta Phil
Date Posted: 04 Apr 2011 at 7:49pm

I'm from the old school and still weld cast occasionally with the old square rod and Hematox flux. It is getting harder to come by now.

Posted By: 48AC/WD
Date Posted: 05 Apr 2011 at 7:36pm

I use Nickel-cadmium rod for best results, take it from me, I am "Navy" certified through the shipyard to weld on 2000 psi boiler tubes and above, i might be able to play with them, if you arent in a hurry, send them my way and I will see what I can do. if you want to try it, pre and post heat them but whire weel the heck outta them, peening is another tactic in the welding process...

Posted By: Warren(Oh)
Date Posted: 05 Apr 2011 at 7:45pm

Interesting, this topic came up. I just recieved an old Wisconsin engine, single cylinder, most all cast iron. Looks like FedEx may have turned it over in transit. The intake tube is broke right at the flange that fastens it to the carburetor. Fairly clean break, should go back together easy enough but my welding skills are likely not up to doing it and making it work. Wire weld, huh ? Flux core ? I'll have to find something to practice on !

Posted By: BennyLumpkin
Date Posted: 05 Apr 2011 at 8:41pm

Biggest thing isnt the pre heat...I never do but its how slowly you can get it to cool....if its small enough put it in a bucket of sand....the sand retains heat and allows it to slowly cool...thats when cracking usually occurs is post welding when cooling down.

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Central PA Allis Express
1934 WC254
1945 WF
1945 WC135755
1951 WD68085
1953 WD45-150217
1957 WD45D-230744D
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Posted By: 7060
Date Posted: 05 Apr 2011 at 8:49pm

Works even better when the sand has been setting on the top of a woodstove, not that I have one. Ive welded cast with someone switching back and forth ahead and behind me with the torch while im welding.

Posted By: Coke-in-MN
Date Posted: 05 Apr 2011 at 9:01pm

Unless you have SS wire i would skip the wire feed , Never tried TIG weld on cast , will have to expierment with that.

Have welded titianium and other chemical resistant metals using TIG but never tried cast.

On the small engine head casting i would be looking at brazing i think instead of welding as less chance of warping head.

Posted By: R.W
Date Posted: 05 Apr 2011 at 10:14pm

My dad uses lincoln cast rod and throws it in a bucket of dry ag lime (it holds heat better than sand) and wait some time and take it out and your good to go.

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