George Lendich wrote:

Hey maties,

Got a question for anyone who's dealt with an inconel exhaust system
(commonly used w/rotary engine installs, in this case a race engine).

Can

stainless steel be easily welded onto the inconel? This question has

come

up

with an EGORtech client who wants to weld some O2 bungs to his inconel
headers, but the best he can do on bungs is in stainless. BTW, if you

know

where inconel O2 bungs can be obtained, give me a shout; I might

include

you

in my will. :)

Bimetallic welds of Inconel / Incoloy / Hastalloy to austenitic stainless
steel are possible.  I don't know all (heck... any!) of the details, other
that it has been done.  Both alloys are austenitic and have high chromium
content, so metallurgically they are fairly compatable (Inconel also has a
minor iron component).  It's a question of the correct filler material,
heat, purge technique, etc.  Definitely not for an amature welder, but
something that a skilled welder can do.

Try to find a nuclear power plant and sound out the welders that work there.
They do these high-tech welds from time to time and they look beautiful.
And there will always be a few that will take on work on the side / at home.

That's the angle I'm thinking of to fabricate some custom welded Inconel
exhaust manifolds & turbo mounts.  I'll let the list know when I hit on
something.

Bob Darrah:  can you send me any details or information on the manifold you
had made?  Dimensions, thicknesses, material, welding process... that kind
of stuff?

 
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