Jeff, I use 304 SS for my exhaust headers and
it has lasted for 10 + years and 500 hour, however, its actually schedule 20 (I
think) SS Pipe used for stair railings –its wall thickness is 0.102 –
so pretty thick which is probably why it has lasted so long. But, thicker
of course means heavier – but, it was considerably cheaper. It will
work, just depends on what your criteria is.
Ed
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Jeff Luckey
Sent: Friday, November 13, 2009
6:38 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: renesis
stock exhaust flange
I thought that the recommended material
for rotary engine exhaust parts was 321 stainless. Is 304 OK to
use? I thought the temp rating for 321 was higher (like 1500F)?
Please correct me if I have incorrect
info.
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On Behalf Of kevin lane
Sent: Friday, November 13, 2009
11:31
To: Rotary
motors in aircraft
Subject: [FlyRotary] renesis stock
exhaust flange
I didn't come across this fact in the
archives and thought I'd pass it on. the stock exhaust flanges appear to
be made from powdered metal. when you attempt to weld to them the base
metal breaks off very easily. I was going to modify the stock exhaust,
then was talked into a new header, using the original flanges. it's only
money. better to break on the workbench, no? I ordered a new 304
flange from ed klepis today. BTW, Columbia River Mandrel Bending supplies
Burns with parts and costs 1/3 to 1/2 the price, plus sells schedule 10 tubing
& elbows [.090 wall] as well. they have been good to deal
with. http://www.mandrel-bends.com/catalog/contact-us.html
kevin
interesting to watch mandrel bending.
they pull this "chain" of brass doughnuts thru the tube while bending
it.
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