Clutch pedal

Anybody good at welding cast iron? It's not anything special, just a clutch pedal. Not much force on it. I have an A/C buss box. Think I should try it myself or take it to machine shop? I have been told stainless steel rod works well on minor repairs on cast iron. Anybody want to educate me on this subject? Thanks
 
The following is from Lincoln Electric: Tech-Rod 55 (AWS class ENiFe-CI) is a nominally 55% Nickel electrode. The lower Nickel content makes this electrode more economical than Tech-Rod 99. Weld deposits are usually machine-able, but under conditions of high admixture, the welds can become hard and difficult to machine. It is often used for repairing castings with heavy or thick sections. As compared to Tech-Rod 99, welds made with 55 Ni are stronger and more ductile, and more tolerant of phosphorous in the casting. It also has a lower coefficient of expansion than 99Ni, resulting in fewer fusion line cracks. Jim
 
I used stainless wire in a mig welder to mend a preheated cast iron exhaust manifold a couple years ago. Good so far.
 
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I always thought nickel was the best for cast, but stainless would be better than mild steel. As others have said, preheat, and then cool it slow. An old blacksmith would braze it!
 
You want NiRod mostly nickel ,very expensive but it will hold . Stainless may be listed as acceptable but NiRod is better. { I can send you a few rods if you like as I got garage sale pricing on mine and some brand new. I bought five pounds for about 50 bucks.} let me know.
 
Thank you Jim, sounds like I need to try heat and bend first and if that fails, weld it with nickel. I have a pretty good local shop, so I think I'll let them do it. Thanks again to everyone.
 
"just a clutch pedal"


A failed weld on a clutch pedal could be an unpleasant surprise, depending on how close you were to the loved one helping you drop the hitch pin. I'm a certified skinflint, but I'd give that repair some serious thought. I wonder what caused it to break. Would you be able to find a good used one somewhere? After having cast all of those doubts, if I was going to weld it, I'd try the SS rods that I've previously had success with. I think the rod number is 308-16, but my memory is short.


In any case - good luck with the repair.
 
Probably is cast steel and not iron . I thought I was the greatest cast welder until I realized the parts were cast steel and not iron.
 
Check to see if its cast steel first. Use a sharp drill and see if you get curls. If all you get is powder it's cast iron, even short curls its cast steel. If its cast steel use 7018ac rod. If its cast iron I would use 55% ni. You can use your welder for the cast no problem, for cast steel you need 7018ac, not regular 7018.
 
You don't say what the clutch pedal is off of, but I REALLY doubt it's cast steel. I bet not a single person here can guess the number of operating sand steel foundries in this country right now. Forget the drill test, try grinding the part, long yellow sparks is steel, short bushy orange sparks is iron.

If somebody was going to make a steel clutch pedal they would probably use a steel forging. Or probably cast it from Ductile iron, also known as mallable iron, years ago called "Semi-Steel"
 

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