ok; i'm building a log style manifold and all of the flanges I have are mild steel; along w/ the tube to go to my 35mm external wastegate and the box tubing to run to the turbo flange.

Now the main part of the log manifold is going to be made out of stainless steel material because that was cheaper than the mild and i honestly wasn't thinking about the 2 metals not wanting to play well together.

My question to you all is how do i bond the mild and the stainless together or is it even doable? IF so what wire/gas should i use in my lincoln mig or what arc rod should i buy to fuse the two?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eLusive ek4 &raquo;</TD></TR><TR><TD CLASS="quote">It's easily done, not sure wire and gas mig combo but for a tig its 308</TD></TR></TABLE>

is that a stainless or regular filler rod?


the wire i've been running in my mig is just the run of the mill 6011 iirc wire you can buy in the giant spools at *insert welding supply store here*

Will that work?

 

i thought it was 309 stainless to mild.

 

309 is what you're supposed to use for carbon steel to mild steel. And of course argon if you're tig welding it. There's other gasses that will work, but Argon is most common and cheapest.

 

use stainless alloy rod. I made my downpipe using a 1018CR flange that I made and T304 piping, 3 years, no issues (the guy that does my welding rocks!)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Engloid &raquo;</TD></TR><TR><TD CLASS="quote">309 is what you're supposed to use for carbon steel to mild steel. And of course argon if you're tig welding it. There's other gasses that will work, but Argon is most common and cheapest.</TD></TR></TABLE>

so straight argon and 309 wire? or is 309 tig rod

this will be MIG'd

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Engloid &raquo;</TD></TR><TR><TD CLASS="quote">carbon steel to mild steel.</TD></TR></TABLE>

Spencer, carbon steel and mild steel are the same thing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boondock Saint &raquo;</TD></TR><TR><TD CLASS="quote">use stainless alloy rod. I made my downpipe using a 1018CR flange that I made and T304 piping, 3 years, no issues (the guy that does my welding rocks!)</TD></TR></TABLE>

309 is a stainless alloy, and it is the proper thing to use on carbon steel to stainless.....per Military specs, per ASME, per AWS specs... I have no idea what 1018CR is, but I don't think I'd use it on something important unless I tried it and then put it to a bend test and other destructive tests to verify that it does retain its integrity and strength first.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ComputerJLT &raquo;</TD></TR><TR><TD CLASS="quote">
so straight argon and 309 wire? or is 309 tig rod
this will be MIG'd</TD></TR></TABLE>
309 is the metal...be it in form of spooled mig wire or straight pieces of tig wire. If you're using mig, I'd reccomend the 309 with pure argon gas. Many people will use C25 gas, which is a mix of argon and co2...but I'm not crazy about the idea of using a CARBON gas on metal that is supposed to be low in carbon. Will it work, yes. Do I like it, no.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mbpwrx &raquo;</TD></TR><TR><TD CLASS="quote">Spencer, carbon steel and mild steel are the same thing.</TD></TR></TABLE>
My mistake. I meant stainless to carbon steel. That's what happens when the fingers and the brain don't work together.

 

Can you flux core wire weld the two together for something like exhaust work? Just wondering.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRXDrew &raquo;</TD></TR><TR><TD CLASS="quote">Can you flux core wire weld the two together for something like exhaust work? Just wondering.</TD></TR></TABLE>

Yeah, but I'd reccomend stainless wire. For exhaust stuff, I'd just use whatever stainless wire you have already, rather than spend money to specifically get 309.

If you can't find a stainless flux core wire, hell with it....throw carbon steel on it. it's just exhaust, you can weld it again if it cracks, and the carbon steel part will rust anyway, so no big deal if the weld does.

 

Nice... thats the answer I wanted to hear... its not like its for a roll cage or something.

I could care less on looks.. i just wanted to use my 80 dollar welder again to weld in a nice long resonator on my OBX b-pipe. 79.99 Harbor Freight welder to the rescue again. Its already paid for itself.