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Old 09-15-2006, 10:33 PM
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Welding Question

I am installing some new ceramic coated headers. The existing pipe is stainless steel, but I may have to make a go between pipe out of regular steel between the header flange and the rest of the exhaust pipe.

Is it possible to weld stainless steel to regular steel?

Weld regular steel to ceramic coated flange?

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Old 09-16-2006, 07:18 AM
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Quote:
Originally Posted by HotRodMan
I am installing some new ceramic coated headers. The existing pipe is stainless steel, but I may have to make a go between pipe out of regular steel between the header flange and the rest of the exhaust pipe.

Is it possible to weld stainless steel to regular steel?
Generally, no, but it could be silversoldered. There are some grades of stainless that can be miged and tiged to regular mild steel. I don't know the alloy numbers, but you local steel shop can help

Weld regular steel to ceramic coated flange?
If the metal is steel, yes, if you get the cera coat off.
Why not get the connector pipe and flange made of stainless?
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Old 09-16-2006, 07:43 AM
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Let's see if I have this picture right. You have invested big bucks in a stainless exhaust system and ceramic coated headers and you want to tie it together with a welded up piece of mild steel? It only costs a few bucks more to keep this a first class job by doing it like 61 Bone suggests. Header flanges are made to allow the exhaust section to be disconnected as well as allowing a slight amount of movement in the system when the engine is torquing.

Trees
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Old 09-16-2006, 11:02 AM
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I agree with both of you, I would rather have the stainless steel, but so far I have not been able to find this at any of the parts stores. I may have to order this from one of the mail order supply houses.
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Old 09-16-2006, 12:01 PM
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Get some small pcs. of S/S flat stock from a metal market and make your own flanges and weld a piece of S/S tube to it as required.You may need to take the plate to a machine shop or someone with a plasma to cut the center hole.
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Old 09-16-2006, 12:07 PM
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I am not sure a fellow can weld stainless and mild steel together..If it was mine I would use a mild steel header flange bolted to the header collector and weld to that for the adapter to the exhaust system..

Often we get stuck on some of these things..Hope this helps..

Sam
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Old 09-16-2006, 12:33 PM
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Like most others, I don't recommend using mild (regular) steel here. But welding regular steel to stainless is just like welding steel and steel. And you can do it with either steel or stainless wire/rod.

But, in this case, don't do it. My vote.

Pat
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Old 09-16-2006, 10:45 PM
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welding

If you're going to weld mild to stainless use 309 or 310 filler rod and Tig it. If you use mild rod on stainless it will eventually crack..JMHO....GlennK
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Old 09-17-2006, 09:04 AM
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Quote:
Originally Posted by Glennk
If you're going to weld mild to stainless use 309 or 310 filler rod and Tig it. If you use mild rod on stainless it will eventually crack..JMHO....GlennK


THIS GUY IS exactly CORRECT.. DONT TRY TO mig IT
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Old 09-17-2006, 04:49 PM
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Found the stainless elbows!

After half a day of searching on the phone, internet, and parts stores I finally found one of the major mail order suppliers that had 2 stainless 90 degree elbows, so I will install this to connect the headers to the rest of the system. Thanks for all the advise, I will follow it to the letter.
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Old 09-17-2006, 05:01 PM
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Yes, the two can be welded. I had this done on my '62 Corvette. I installed Headman cermaic coated headers with the ball flange type collector. The other end of the flange that connect to the ball was of regular steel. What I did was to get the next size 2 1/2" rear flange connector then got a piece of 2 1/2" stainless pipe and had the it welded together. Whewn installed the 2 1/2" pipe slips over the 2 1/4" o.d. of the rest of the system (stainless). This allows me to unbolt the flange from the collector and slide it back if I have to take the headers off. It's close quarters.
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