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I needed some specialty type rod to weld my gear legs. I called the only company I could find that sold it, and asked for a pound. They wouldn't sell me an amount that small, but they sent me a marketing sample...one pound of it...for free.
George Lendich wrote:
Brian,
That's way too much to have to pay.
Worst comes to worst, go to a welding shop and buy some from them.
George (down under)
Where did you get the inconel rod? Central welding up here in Washinton wants $35 a pound, minimum order of ten pounds. I've got an inconel exhaust that is tacked together right now, but can't proceed until I get some 625 Inconel rod.
Brian Trubee
Tracy,
I used inconel filler rod (which I had to purchase from an aerospace supply firm in California) and TIG welded my current inconel exhaust. Welding 625 Inconel was about the same as welding 321 SS, i.e. no special skills requried.
Mark S. On Tue, Oct 19, 2010 at 8:47 PM, Tracy <tracy@rotaryaviation.com <mailto:tracy@rotaryaviation.com>> wrote:
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
<mailto: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
<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
<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/>
<http://www.KevinLaneCarpentry.com
<http://www.kevinlanecarpentry.com/>>
>
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