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exhaust pipe TIG welding

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leeh(at)emtinternational.
Guest

Posted: Sat May 04, 2013 6:13 pm Post subject: exhaust pipe TIG welding

Can anyone help me with what material the exhaust pipes might be on my Yak52 tricycle?  They appear to be original Russian pipes, they are NOT magnetic, and dark brown in color. 

  

Inconel? 

SST? 

  

I need to cut the pipe, slide on a new nut, and TIG weld back together.  Inconel 618 filler?  SST 304/309? 

  

Thank you  

  

leerhaven(at)gmail.com (leerhaven(at)gmail.com) 

Lee Haven | Engineering Manager 

9208583559 

  

    [quote][b]

viperdoc(at)mindspring.co
Guest

Posted: Sat May 04, 2013 8:03 pm Post subject: exhaust pipe TIG welding

Titanium. You are not TIG welding that.

Doc



Sent from my iPad



On May 4, 2013, at 9:09 PM, Lee Haven <leeh(at)emtinternational.com (leeh(at)emtinternational.com)> wrote:

[quote]      <![endif]-->   <![endif]-->    

Can anyone help me with what material the exhaust pipes might be on my Yak52 tricycle?  They appear to be original Russian pipes, they are NOT magnetic, and dark brown in color. 

  

Inconel? 

SST? 

  

I need to cut the pipe, slide on a new nut, and TIG weld back together.  Inconel 618 filler?  SST 304/309? 

  

Thank you  

  

leerhaven(at)gmail.com (leerhaven(at)gmail.com) 

Lee Haven | Engineering Manager 

9208583559 

  

     	  Quote: 	
		  

	


[b]

dsavarese0812(at)bellsout
Guest

Posted: Sun May 05, 2013 5:31 am Post subject: exhaust pipe TIG welding

If truly original, they are titanium.  They could also be stainless steel.

Dennis

From: Lee Haven <leeh(at)emtinternational.com>

To: "Yak-List(at)matronics.com" <Yak-List(at)matronics.com>

Sent: Sat, May 4, 2013 9:13:51 PM

Subject: exhaust pipe TIG welding

Can anyone help me with what material the exhaust pipes might be on my Yak52 tricycle?  They appear to be original Russian pipes, they are NOT magnetic, and dark brown in color.  

Inconel?  

SST?  

I need to cut the pipe, slide on a new nut, and TIG weld back together.  Inconel 618 filler?  SST 304/309?  

Thank you   

leerhaven(at)gmail.com (leerhaven(at)gmail.com)  

Lee Haven | Engineering Manager  

9208583559  

    [quote]

[b]

fish(at)aviation-tech.com
Guest

Posted: Sun May 05, 2013 5:08 pm Post subject: exhaust pipe TIG welding

Doc,

       

       Actually, tig welding is how you would weld titanium.

       Probably not for the average welder.

       

 http://www.millerwelds.com/resources/articles/TIG-gtaw-titanium-welding

       

       Laterrrrrr

       John Fischer

       

       

       On 5/4/2013 9:01 PM, Roger Kemp M.D. wrote:

     

     [quote]              Titanium. You are not TIG welding that.

       Doc

         

         Sent from my iPad

       

         On May 4, 2013, at 9:09 PM, Lee Haven <leeh(at)emtinternational.com (leeh(at)emtinternational.com)>         wrote:

         

       

        	  Quote: 	
		                                              <![endif]-->   <![endif]-->                        

Can anyone help me with what               material the exhaust pipes might be on my Yak52 tricycle?                They appear to be original Russian pipes, they are NOT               magnetic, and dark brown in color.             

              

Inconel?             

SST?             

              

I need to cut the pipe, slide on a               new nut, and TIG weld back together.  Inconel 618 filler?                SST 304/309?             

              

Thank you              

              

leerhaven(at)gmail.com (leerhaven(at)gmail.com)             

Lee Haven | Engineering Manager             

9208583559             

            

            	  Quote: 	
		  

	
         

       

	
     [b]

Dale

Joined: 30 May 2007
Posts: 178

Posted: Sun May 05, 2013 5:16 pm Post subject: Re: exhaust pipe TIG welding

Most of the exhaust I have seen are stainless steel.  My one 52 had a engine out of a Yak 50 and they were titanium my other one was stainless.  If you try to weld titanium with a tig using a ss rod you will blow a hole in it. Out of the 9 planes I fly with only mine was titanium the rest were Stainless. So one out of 9 and mine had a Yak 50 engine FWF installed according to the Russian Log.

viperdoc(at)mindspring.co
Guest

Posted: Sun May 05, 2013 5:52 pm Post subject: exhaust pipe TIG welding

Okay bad advice. Not a welder. 

Doc



Sent from my iPad



On May 5, 2013, at 8:05 PM, John Fischer <fish(at)aviation-tech.com (fish(at)aviation-tech.com)> wrote:

[quote]                   Doc,

       

       Actually, tig welding is how you would weld titanium.

       Probably not for the average welder.

       

 http://www.millerwelds.com/resources/articles/TIG-gtaw-titanium-welding

       

       Laterrrrrr

       John Fischer

       

       

       On 5/4/2013 9:01 PM, Roger Kemp M.D. wrote:

     

      	  Quote: 	
		                Titanium. You are not TIG welding that.

       Doc

         

         Sent from my iPad

       

         On May 4, 2013, at 9:09 PM, Lee Haven <leeh(at)emtinternational.com (leeh(at)emtinternational.com)>         wrote:

         

       

        	  Quote: 	
		                                              <![endif]-->   <![endif]-->                        

Can anyone help me with what               material the exhaust pipes might be on my Yak52 tricycle?                They appear to be original Russian pipes, they are NOT               magnetic, and dark brown in color.             

              

Inconel?             

SST?             

              

I need to cut the pipe, slide on a               new nut, and TIG weld back together.  Inconel 618 filler?                SST 304/309?             

              

Thank you              

              

leerhaven(at)gmail.com (leerhaven(at)gmail.com)             

Lee Haven | Engineering Manager             

9208583559             

            

            	  Quote: 	
		  

	
         

       

	
     

	


[b]

viperdoc(at)mindspring.co
Guest

Posted: Sun May 05, 2013 8:51 pm Post subject: exhaust pipe TIG welding

I'm lucky enough to have had a brother of a friend that works in a local aerospace company that had a vacuum chamber that they used to repair my exhaust pipe segment after it cracked. It had cracked along the top of the segment in the bend off #9 cylinder. His advice was if a welder had tried to weld it in a regular shop with out a gas purge they would have blown a hole in it. hence my ill informed statement.

Thanks for correcting me.

Doc



Sent from my iPad



On May 5, 2013, at 8:16 PM, "Dale" <dale(at)frii.com> wrote:



 	  Quote: 	
		   

 

 Most of the exhaust I have seen are stainless steel.  My one 52 had a engine out of a Yak 50 and they were titanium my other one was stainless.  If you try to weld titanium with a tig using a ss rod you will blow a hole in it. Out of the 9 planes I fly with only mine was titanium the rest were Stainless. So one out of 9 and mine had a Yak 50 engine FWF installed according to the Russian Log.

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=400021#400021

jimmy(at)pfmengineering.c
Guest

Posted: Mon May 06, 2013 5:44 am Post subject: exhaust pipe TIG welding

Titanium is not difficult to weld if properly shielded by inert gas. 

Exhausts require plugging both ends and feeding in the inert gas through one 

of the plugs after purging.  SS exhaust requires a similar technique for 

proper welding.



Jimmy Burke



--

leehaven

Joined: 15 Aug 2011
Posts: 1

Posted: Tue May 07, 2013 7:47 am Post subject: Re: exhaust pipe TIG welding

What is the appropriate shielding gas and filler rod for titanium?



Anyone know of a good litmus test to determine titanium or SST?



Doug had a great technique of cutting the rings instead of the tube.  Would be good to be armed with both options though.

Dale

Joined: 30 May 2007
Posts: 178

Posted: Tue May 07, 2013 3:36 pm Post subject: Re: exhaust pipe TIG welding

Argon gas and titanium  rod.  Easy way to tell without grinding on it and looking at the sparks is to have someone weigh a stainless section and then you weigh yours.  Titanium should be only 2/3 the weight of the stainless section.  You can acid test it as well .  Look on the web for a spark grind or acid/ chemical test.  I don't remember off hand what the chemicals are, sorry.  You will need to purge the inside of the exhaust with argon as well while welding it.  Get someone to weld it for you if your not a good welder with good equipment.  It will be cheap compared to buying a new exhaust because your newly welded one is off slightly and now doesn't fit.  I thin you might try aircraft exhaust inc.  they build and repair m-14 exhaust systems.

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