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Tracy,
What sort of welding did you do, if it were MIG you
probably used 316 welding wire, that's what is used for all stainless, if TIG
you may have used some sort of rod recommended for 321, don't know what that
would be - probably 316.
George (down under)
IF you use thick enough material,
even mild steel will work. I used 321 for 2 reasons. You can go
thinner with it than 304 and reduce the weight. I put 900+ hours on a set
of headers made from .035 321 SS with no signs of deterioration (other than the
metal turning a dark color). 321 SS is the nicest welding alloy I've
ever worked with. I tried welding Inconel with no luck at all so I would
have needed professional help if I used that.
Tracy
On Tue, Oct 19, 2010 at 8:22 PM, Jeff Luckey <JLuckey@pacbell.net> wrote:
I thought that people were commonly using 321 for Rotary
exhaust systems
because it has a higher temp rating.
It's been a
while, but I vaguely remember looking it up, and the max working
temps were
something like this:
304 = 1200F
321 = 1600F
So, my question
is, are people using 304 successfully for Rotary exhaust
systems. If
so, that's great, because it's cheaper & more
readily
available.
-----Original Message-----
From:
Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On
Behalf Of Ernest Christley
Sent: Tuesday, October 19, 2010
07:51
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: header
parts source
Jeff Luckey wrote:
> Does Columbia now carry 321
stainless. IIRC, I pinged them about a year
> ago and they did not
carry 321 stainless…
>
>
I also bought bends from Columbia.
Their service and delivery was
excellent.
I don't see any
mention of 321, but I wasn't really concerned about it.
Given the diameter
of tube we have to use for
exhaust flow, and the thickness we need to
contain the exhaust pulse, and
the corrosion resistance characteristics
of
the alloys at elevated temperatures, I couldn't see enough of a
difference
to stress over.
>
>
------------------------------------------------------------------------
>
>
*From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
>
*On Behalf Of *kevin lane
> *Sent:* Monday, October 18, 2010
22:03
> *To:* Rotary motors in aircraft
> *Subject:* [FlyRotary]
header parts source
>
>
>
> I have been happy with
Columbia mandrel bending. they make their own
> parts, family run,
and significantly cheaper than burns.
> http://www.mandrel-bends.com/catalog/
>
> last
week I finally got the v-band, another 90°, a flex joint, and
> muffler
added to this header.
>
>
>
>
>
>
KevinLane Carpentry
> www.KevinLaneCarpentry.com <http://www.KevinLaneCarpentry.com>
>
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