welding cast iron
 

the bosses dad asked me to try and repair his MGB manifold and its cast iron (not steel)
any hints tips suggestions??


i know to preheat but any other info

Re: welding cast iron
 

Preheat, weld it hot, then cool it slowly (sand or something) if you can.

Re: welding cast iron
 

x2

Re: welding cast iron
 

anneal that ---- x3

Re: welding cast iron
 

keys to iron success:

• if cracked, drill out the ends of the cracks so they do not continue to run
• preheat the entire piece evenly to 450*F+
• make small stich welds 3/4-1" long
• peen the weld area after each-every few weld beads while very hot to help relieve stress.
• use the correct nickle filler be it stick, gmaw, fcaw or tig. don't weld cat iron with steel filler own up $5 for a single rod or two of the correct stuff. most suppliers will give you a rod or few for afew dollars. (nickle filler is fairly expencive btw)
• do not let the piece cool rapidly. use a welding blanket or a bucket of sand to control the cooling. do not mess with i for 48 hours

Re: welding cast iron
 

cast iron relaly isn't hard. it just takes along time to do it right. pre/post heat control, peening, filler. if you take your time youll never have a problem.

Re: welding cast iron
 

just crank up the welder to high and lay that ---- on.

Re: welding cast iron
 

make him a log manifold so he can boost that beeyotch

Re: welding cast iron
 

drill the crack out bigger for welding a tial flange to.

im a welding noob. what's peening? You mean like hammering. nm, looked it up

FYI
tr.v. peened, peen·ing, peens
To hammer, bend, or shape with a peen

Re: welding cast iron
 

thr prob i had was as soon as i put heat to it it started spittting ---- everywhere

Re: welding cast iron
 

Easy: You braze it instead. O0

Seriously. Not too many scenarios where I would pick welding over brazing for cast iron. Cast steel I would weld, no probs. Cast iron? Why bother?

Re: welding cast iron
 

fluxcore + extra wire fed = cast iron welded and ready for duty

Re: welding cast iron
 

+1

Re: welding cast iron
 

give it repeated mild blows with a hammer.

brazing is for morons.

Re: welding cast iron
 

no shot peen it :D

Re: welding cast iron
 

shoot yourself in the peen

Re: welding cast iron
 

Use the cast iron rod with a stick welder. The high nickel stuff is machinable afterwards, but expensive. Welding cast iron isn't bad at all, really.

Re: welding cast iron
 

Wellding cast iron is a breeze if done correctly wht the correct procedure and filler.

I find vermiculite amazing for slowly cooling cast iron. http://en.wikipedia.org/wiki/Vermiculite


It is the white stuff in potting soils and can be bought by the bag at most garden centers.



Dont forget to preheat and peen!!!

Re: welding cast iron
 

Wow, welcome to three weeks ago.

You must have gotten up to 88 MPH before you hit the post button.

Re: welding cast iron
 

dude, you do not step into hmt with an insult as how to weld cast iron with proper technologies, and insult the mighty fluxcore.

Re: welding cast iron
 

It takes forever to get to 88 when you integra is on blocks!!

Re: welding cast iron
 

Nonsence! Eutectic Castolin makes amazing cast iron and speciality rods that you can even run on a cheap-o 220v AC stick welder, the xuper 2240 is a great cast iron rod.