Weld Cast Iron and Mild Steel?
Answers: Alumiweld company use to donate a product to fix cast iron next to just a propane torch--not sure if they do anymore---check them out
http://www.alumiweld.com/h2uaw.html...
Otherwise, this site have lots of info on fixing cast iron
http://www.locknstitch.com/castironweldi...
And this one
http://www.muggyweld.com/castiron.html?o...
you own to Braze cast Iron. Regular weld doesn't work too well (as you've found out).
i use to work surrounded by a foundry, we had to put the imprint iron into a oven and heat it to cherry red until that time we could weld it then slowly diminish the heat to keep hold of it from cracking, There is a low temp brazing rod now on the flea market, but unless you can heat the together stove , expect it to crack again,
try drilling small holes Thu the patch and stove to bolt it on, using a high grill sealant to fill the crack,
Try Cronatron.com they own cast iron rods. I would drill holes at the ends of the crack to relieve the stress prior to weld.
Try using JB Weld. It's a two-part epoxy. I am not sure if it will stand up to the heat of a stove, but it does work patching metal pots and pan.
I agree that welding will tag on a lot of warmth to an area of sort iron. It would need to be preheated pretty hot to prevent a roomy amount of differential expansion. Would help if you can evenly fry the entire stove. Might also try drilling a small hole at the end of the crack to maintain it from continuing to run.
To properly weld cast iron you use a carbon arc welder. Not too copious people do this but you may be ale to find a upright welding shop within the yellow page that can do it for you.
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