I have a steel V-Band flange that I want to weld to my turbone housing which is cast steel, and I was wondering what the right procedure to do this, because I have heard that you need to preheat. etc, but I just want to know the right way by someone who has done it before, thanks.

 

Avoid using stainless.
Last time, I had a machinist make me a flange out of malleable cast, then welded it with er70s-2 TIG.
Preheated to 450 Deg.
Did 2 passes, heated between and after.
Worked great, no cracks, been running for about 6 months.
Car made almost 700whp.

 

Great, thanks so much for your help.

 

i have done a few i used mild steel flanges and pre heated the housing to 400-450 degrees. I then welded it with 309L rod pedal max set to about 115 amps, peddling around ~100. Once it was done i then put it back in to post heat it for like 15 min at 450 deg again.

 

Just curious what you use to preheat and postheat the housing? You just toss the housing into the oven and stick it on broil?

 

i heat stuff on a hot plate. i've done the same procedure using a ms v-band, 309L and preheating. i welded inside and out. no issues so far.

 

i use a toaster oven lol.

 

toaster oven? haha never thought of that. Does it get the whole housing hot enough?

 

Would it be ok to use 312 filler for this sort of thing?

 

oh hell yeah, i actually like it for things like that because i dont have to wait 10 min for a full oven to warm up. And as long as its a new part i can still put my pizza in it after and not have to worry about dying

 

I just use ER70S-2 and TIG it with preheat. I usually flap wheel the housing where im going to weld it too

 

Are you preheating the housing only or both the housing and flange?

 

just the housing

 

every time i did it i did both, i dunno if u need to but i did.

 

The flange is such a negligible amount of metal compared to the housing I never really bother

 

thanks for all of the input guys.

 

There is no reason to use stainless filler unless you have a stainless v-band flange.
It's not really a good choice when you are talking cast.
The whole idea of cast is not to change shape alot with heat, and stainless shrinks like crazy after heating.
Under-bead cracking is common. You can't see it, and it may not break...

 

Ive had the best luck using Nickel rod on Cast to stainless. The guy at the welding store suggested it and I tried it, worked really well and never broke.

 

Yes, ni-rod is ok, but it's not really meant for super high temps.
It's great for most cast applications though, as it's very ductile.
It welds so smooth too.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 9bells &raquo;</TD></TR><TR><TD CLASS="quote">There is no reason to use stainless filler unless you have a stainless v-band flange.
It's not really a good choice when you are talking cast.
The whole idea of cast is not to change shape alot with heat, and stainless shrinks like crazy after heating.
Under-bead cracking is common. You can't see it, and it may not break...</TD></TR></TABLE>
Sure there is a reason to use stainless rod .It has the most nickle besides inconel.I have welded around 50 or 60 of those flanges and other style flanges with inconel rod and not preheated anything.And never seen not one crack or break.Make sure you clamp the ring to the housing just to get 4 good tacks without it lifting on one side.Then after you have tacked it take the clamp off and weld it all the way around.Not a little on one side and a little on the other side.One good slow pass with alot of rod is fine.

 

Its cast steel, not cast iron....you can use normal er70s-2 rod

 

i typically use plain mild rod. i'll pre-heat it a little bit with a torch and start welding. sometimes i don't pre-heat.

i never use stainless rod of any kind. cracks too easy. i'll use the mild for clean stuff and the nickle if its been really used. the nickle seems to help if you can't get all the carbon off.

i'll let it cool on the bench for an hour or so.

i've probably done 20~30. havn't had one crack yet. probably one of the funnest things to weld in my opinion. turns out nice and you're eliminating bolts

 

iv welded roughly 50 or so housings with stainless and steel flanges and have yet to see one crack. I've always used 1/8 308 rod and only weld it internally.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bigTom &raquo;</TD></TR><TR><TD CLASS="quote"> I've always used 1/8 308 rod and only weld it internally. </TD></TR></TABLE>

jesus! thats like using a jack handle for rod. what kind of amperage?

 

depends on the housing but if i remember correctly 180 or so...

edit: now that i think about it, it may be less... i dont remember, i havent done one in a couple weeks.... this is pulsed as well...