Posted by trucker40 on September 11, 2009 at 18:26:51 from (69.155.104.135):
In Reply to: Re: Stitch vs Welding posted by pro welder on September 11, 2009 at 17:16:39:
I have welded a lot.I have seen things brazed before like that and it will work,the problem would be finding somebody that could do it now days.Braze is a lot weaker than 7018.Less than half the strength maybe a quarter the strength of 7018.I know the difference between steel and cast steel.Nickel rod has its place but 7018 done like I said is the right way to fix cast steel.Most tractors are made out of cast steel.Cast iron is different and some of that might only be welded with nickel.Tractors like bulldozers are made of cast steel.Look at an old road grader or bulldozer where its been welded on a casting,they used 7018.I know what Im talking about.Now there are lots of better welders than me,but to weld cast steel you need to leave the nickel rod off of it,cast iron maybe.Cast steel is different than cast iron.I have had to grind too much of that stuff off so I could weld it with 7018 and braze that was done poorly as well.A good welder can fix it with 7018 or you can cobble on it from now on with nickel and braze.Somebody good at brazing,then put a patch over it and braze it and it might work,but gas costs way more than it did 40 years ago and it will take some.Welding with 7018 would be cheaper.I wont even mention 7018 is not the only rod that will work either as long as you do it the way I said 6011 and others will work.Basically if you can grind it with a grinder you can weld it with a welding rod with very good to poor results.Some rods might not work,some will.I saw a racer weld a 350 Chevy block with a 6011 rod,grind it with a 7 inch grinder,check it with a straightedge,slap a head gasket and head on it and go racing.I have welded my H Farmall rear end housing with a MIG and had to grind the braze off to get to it.It was a crack about 8 inches long with a couple of branches off of it and I heated it with a torch ahead of my welder,plus it was over head.Burned a couple of tips and nozzles up but got it done.Since then Ive used it for a bulldozer with a front end loader and knock on wood is still together.I dug a foundation for a building,spread rock,built a ramp up to a garage on the back of a house,dug out concrete foundation blocks from where a house burned down since then.When I got the tractor there was a big grease mess under it where it was leaking from the braze being cracked everywhere.Its dry and clean and painted now.
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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