Can crack out and won't bond properly and will look like **** with probable perocity( holes).


316 grade stainless will bond to carbon , that's the only way ( that I'm aware of)to properly weld stainless metal to carbon steel is with 316 filler/wire. We weld stainless angle/brackets /piping to carbon/ mild steel at work all the time .

Also my miller 220 mig has stainless wire so I can tack/weld most anything I have laying around the shop.

 

So is it ok to weld mild steel with stainless wire?

 

Most affordable source I have found.

OD 38mm 1 5" Sanitary Weld Elbow Pipe Fitting 90 Degree Stainless Steel 316 Sus | eBay

 

Yup

 

What are you planning to use them for ?

That would be fine for cold side piping but way too thin for hot side .

 

How thick is necessary? I have seen several 8 second turbo cars with 409 stainless 1998 Camaro exhaust manifolds. Those are pretty thin walled.

 

You can weld SS to mild with any SS rod. The preferred is 309, but 308 and 316 work fine. If you're using a mig, all you need is 308 wire with argon gas.

I try to only use Mild flanges on turbo manifolds because they won't warp during welding or use after the fact. I typically use 304 SS bends, but the 316 weld pretty nice too.

I would not buy weld els in mild from mastercarr. They'll bend you over pretty good. as mentioned above, Ferguson or any other local commercial plumbing supply company will get you a good price.

For reference, I typically pay $5 for a long radius 304ss bend. Looks like the mild bends are more expensive lol.

A good stainless bend online supplier is acestainless.com

They also have mild if thats the way you end up going.

Schedule 40 - 90° Elbows (Weld Els) - Mild Steel - Butt-Weld Fittings - Ace Stainless Supply

 

^^ yup good info.

Here is a table we are building at work for equipment racks to slide back and forth on with rollers . The the rails are carbon steel , welded to 316 stainless , which us welded to carbon steel plate . All work was done with TIG/ 316 filler ( that's what we have ) and it all is forever , no problems at all with the dissimilar metals