Steve,   
  
It appears that B2 SS is used for flatware, heaters, etc.  It welded easily with 321SS rod.  You may want to shoot DNA an email and see what rod they recommend. 
  
Mark
 
  
On Mon, Apr 25, 2011 at 9:49 AM, Steve Thomas  <glasair2@me.com> wrote:
 Mark,
  The web site lists the material used in the construction of the muffler as "B2 Stainless."  What is  that?  What do I tell my welder who will be requested to weld a 321 stainless transition to it? 
 Best Regards,
  Steve Thomas
  _______________________________________________________
 
 
 
 
  On Apr 22, 2011, at 12:37 PM, Mark Steitle wrote:
  > Steve, > > Way to go!  It should outlast your airframe. 
> > Mark
 
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