On Sat, 02 Aug 2008 08:43:30 -0400, Dave wrote:

What type of stainless is used for most general aviation aircraft?
I had a welder friend of mine ask me this question.

Thanks

Dave

I presume that you are asking about exhausts since stainless is not
used in most of GA aircraft at all.
the alloy for much of the exhaust is called inconel.
if they are stainless then 321 is used on flanges and in pipes.

whatever alloy is used should be non magnetic and have some resistance
to erosion by hot exhaust gasses.

Stealth Pilot