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Welding Cast iron? Please help.

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Jim in AK

11-04-2006 14:08:00




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O.K. you welder types. I'm going to try and weld that broken steering arm. I know from my past welding of cast it will not hold or at least not for very long. All I am trying to do is get the deere back up to the house. I have 7018 ac 6011 6013 and two types of stainless rod. Which will work best for cast and what can I do in preparation that might increase my chances of getting good enough weld to make it back up to the house.

Jim

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chad 9999

11-06-2006 22:02:14




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 Re: Welding Cast iron? Please help. nicrmo-4 in reply to Jim in AK, 11-04-2006 14:08:00  
buck and deere hit rite on the money and use a rod suitable for cast like nickel or nicrmo-4 it has some alloys in it grind a very deep grove in it with the nicrmo-4 rod it will weld anything but stainless preheat entil u cant hold it then start welding first on one side then on the other clean very good the repeat welding on one side then the other dont stop until done put about 6 inches of sand all the way around it let cool until cool

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easydoesit

11-06-2006 10:16:43




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 Re: Welding Cast iron? Please help. in reply to Jim in AK, 11-04-2006 14:08:00  
I have had remarkable results using Certanium alloy rods. I'm not a good welder but I have welded just about everything. I don't use nickle rods anymore..too fussey..preheat..peening..etc.



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Kurt_JDB

11-04-2006 14:37:17




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 Re: Welding Cast iron? Please help. in reply to Jim in AK, 11-04-2006 14:08:00  
Maybe if all you need to do is get it back up to the house you could put it back together with JB Weld. Its pretty good stuff. You can get it apart again with a little heat.

Kurt



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135 Fan

11-04-2006 14:31:01




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 Re: Welding Cast iron? Please help. in reply to Jim in AK, 11-04-2006 14:08:00  
If you only need to move it a short distance. Preheat it just so it's warm. Grind a groove in it and clean up all around the weld area. Use your 7018 AC, weld about an inch and then peen it with a small ball peen hammer or dull pointed chipping hammer or punch. This will help to relieve stress. Do it immediately after welding and then weld another inch or so and do it again. It's ok if the weld has marks on it. Try to wrap something around it so it will cool slowly. It should get you to the house. 7018 can be used for cast Iron in an emergency and if the part is forged is still the proper rod. If you look on charts, it says 7018 is good for difficult to weld steels. If you wanted a permanent repair then I'd braze it as a first option. Good luck. Dave

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135 Fan

11-04-2006 15:14:35




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 Re: Welding Cast iron? Please help. in reply to 135 Fan, 11-04-2006 14:31:01  
Just wanted to add that when peening the weld, you don't have to hit it as hard as you can. Give it a moderate hit about 7 or 8 times. Over peening can add new stresses. All you're trying to do is counteract the the stresses from the shrinking of the weld when it cools. Dave



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jhill52

11-04-2006 13:43:16




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 Re: Welding Cast iron? Please help. in reply to Jim in AK, 11-04-2006 14:08:00  
Are you surem it is cast? Most steering parts are forgings. As somone else said a carbon steel rod would work then. I would double check the material.

Jerry



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buickanddeere

11-04-2006 19:59:55




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 Re: Welding Cast iron? Please help. in reply to Jim in AK, 11-04-2006 14:08:00  
Preheat well and cool very slowly while burried deep in dry sand. Peen the daylights out of the weld to reduce stress.



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F-I-T

11-04-2006 19:02:39




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 Re: Welding Cast iron? Please help. in reply to Jim in AK, 11-04-2006 14:08:00  
I recommend you try some Muggy Weld rod. It has saved many castings for me. Not hard like nickel, easy to use if you are a decent arc welder. If you do gas, cast iron ingot and a proper flux as is recommended on the Henrob site works well, too, but it helps if you have a Henrob torch.

Here's a link for Muggy Weld:

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PJBROWN

11-04-2006 18:09:31




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 Re: Welding Cast iron? Please help. in reply to Jim in AK, 11-04-2006 14:08:00  
First get some cast rod... any welding place will have some. Just remember weld a small ways and stop and let it cool. Than weld some more and stop and let it cool.



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skip 33652

11-04-2006 15:34:17




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 Re: Welding Cast iron? Please help. in reply to Jim in AK, 11-04-2006 14:08:00  
If it is really cast iron you need nickle rod ,cast rod,or brazing rod .will work for a long time.if it is a stearing arm I will bet on a forged type material in wich case mild steel rods will work fine. Paul



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Glen in TX

11-04-2006 15:31:47




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 Re: Welding Cast iron? Please help. in reply to Jim in AK, 11-04-2006 14:08:00  
Like said you really need some nickel or cast rod. They make it in machinable and non machinable types and just regular nickel rod. If you can't find any there at all I'd try the stainless rod over the other rods you have and I've joined odd metals or tooling steels with stainless before and it worked well. V out break a bit with grinder. Heat the casting up well with a torch and weld a little a time and then ping the weld with a pointed or ball pein hammer while letting it cool.

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Wayne in Tn.

11-04-2006 14:26:57




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 Re: Welding Cast iron? Please help. in reply to Jim in AK, 11-04-2006 14:08:00  
If I am thinking right, the 7018,6011 and 6013 are all mild steel rods, not suitable for cast iron. I just go to my friendly parts store and ask for a nickle rod. I have had good luck with the nickle. Just weld a small spot and let it cool then weld some more, ect. Not letting it get too hot.



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