Need help quick

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Can aluminized steel be welded to stainless steel.Im asking because my downpipe on my car is stainless steel, but for some reason the metal shops in my area are out of 3inch dia. stainless steel tubing and im stuck with aluminized steel?would it be best to wait for ss, and not to weld the a/s to s/s?im tig welding it btwLast edited by disepyon; 01-10-2008 at 09:02 PM.
Reply:I think it could be done with some 309 filler and you'd have to grind the coating off of the steel --Gol'
Reply:I know I would not do it, but let us know how it comes out and Pics would be nice.   JohnSMAW,GMAW,FCAW,GTAW,SAW,PAC/PAW/OFCand Shielding Gases.  There all here. :
Reply:Nothing to it! It's just mild steel with an aluminum coating, kinda like galvanizing. Just grind off the aluminum and weld with 309, or 70s-2 even.Miller EconotigCutmaster 38Yes ma'am, that IS a screwdriver in my pocket!
Reply:You can do it with mild steel, it just rusts out quicker.
Reply:I agree with removing the aluminize coating from the carbon steel side.  Assuming this is part of the exhaust system, I suggest Inconel filler metal--ERNiCr-3 or any of the "82" grades.  Otherwise, due to the difference in thermal expansion coefficient between stainless and carbon steel, the repeated heating and cooling cycles can cause a crack to develop where the two meet.  I would definitely avoid using ER70S-2 on stainless steel; more cracking.