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Posted by on July 13, 2007, 5:24 pm
Please log in for more thread options Thanks for the replies
It seams kind of strange though. Most high performance exhaust builders
use the 304 or else 321 for racing turbo and sometimes Inconel for
really extream turbo application. I have seen the 409 refered to at the
cheap alloy the automotive industy came out with for production cars.
Top exhaust builders dont even give 409 an honerable mension but some of
the off the shelf low dollar headers are made with 409. But in any case
309 will be the filler I will use.
Thanks
John Roncallo
Potblak wrote:
> Most stainless exhaust systems are made with the 400 series alloys and are
> usually welded using overcompensated 414 to allow for Chromium loss during
> welding.
> But as Ernie said, if you're going to introduce 300 series tube into the
> system, you'll be best to use 309LO.
> I don't think the 300 series tube will last long, though. It's not very good
> in reducing environments such as carbonous and sulphurous acid vapours found
> in exhaust gases.
>
>>Gentelmen
>>
>>I will be welding up an exhaust system using mufflers and cats from a 1996
>>Mercedes Benz SL600. The material for the mufflers and cats is belived to
>>be stainless but the alloy is unknown.
>>
>>These parts will be welded to 304 stainless steel tube. It is most likely
>>that the parts are either 304 321 or 409 stainless. 409 is the american
>>exhaust system standard.
>>
>>Which TIG wire do you guys recomend for this unknown application or is
>>there a way of finding out which stainless it is.
>>
>>Generally 304 to 304 is welded with 308 wire
>>304 to mild is welded with 309
>>321 to 321 is welded with 347
>>And I have no idea what is used with 409
>>
>>Thank You
>>John Roncallo
>
>
>
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>
> I will be welding up an exhaust system using mufflers and cats from a
> 1996 Mercedes Benz SL600. The material for the mufflers and cats is
> belived to be stainless but the alloy is unknown.
>
> These parts will be welded to 304 stainless steel tube. It is most
> likely that the parts are either 304 321 or 409 stainless. 409 is the
> american exhaust system standard.
>
> Which TIG wire do you guys recomend for this unknown application or is
> there a way of finding out which stainless it is.
>
> Generally 304 to 304 is welded with 308 wire
> 304 to mild is welded with 309
> 321 to 321 is welded with 347
> And I have no idea what is used with 409
>
> Thank You
> John Roncallo