welding 304 SS to 409 SS

[Dream On]

I've got a catalytic converter that is 409 SS that I'd like to weld on my 304 SS flanges. Any idea what kind of filler rod I should use? I have access to both MIG and TIG through the machine shop at the school, but I'm not sure what I should be using to weld the two. Google searching hasn't resulted in anything so far. Thanks.

 

[tkelly27]

I can't pretend to know, but if you can't get any info here, they have a lot of good welding/DIY info over on www.turbomustangs.com . At least that's where I go when I have a welding Q.

 

[Dream On]

I haven't looked over there too much, but I haven't found anything there so far either...

 

[DarthBulk]

Look here:

http://www.lincolnelectric.com/knowledge/articles/content/stainlesssteel.asp

It seems you should use 309L Filler rod. Both Lincoln and Miller have a lot of useful information on their sites for welding.

 

[Dream On]

Great info. Thanks for the link.