Factory exhaust material
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Joined: Apr 2017
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Factory exhaust material
Does anyone know what the material is for the exhaust pipes, specifically behind the AFM valves, on a NPP exhaust system?
I believe its stainless steel (might be just steel) but does anyone know for sure? and what type of stainless it is, 304, 316, ect?
Thanks
I believe its stainless steel (might be just steel) but does anyone know for sure? and what type of stainless it is, 304, 316, ect?
Thanks
Last edited by 16Stingray; Nov 20, 2017 at 12:29 PM.
Safety Car
Joined: Feb 2002
Posts: 3,726
Likes: 368
From: Montoursville Pa
Pipe grade
Thread Starter
Advanced
Joined: Apr 2017
Posts: 60
Likes: 0
I was looking at this blue demon welding wire, has anyone used it?
Since it sounds like i would be welding the stock type 200 stainless steel to the after market type 304 does anyone one know which welding material would be best between these two?
http://www.weldingmaterialsales.com/.../E308LFC-O.htm
http://www.weldingmaterialsales.com/...9/E312FC-O.htm
I wasnt sure on the material but the E312 type says it is capable of joining dissimilar metals. I am not sure if it would be more brittle than the E308.
Any ideas?
Since it sounds like i would be welding the stock type 200 stainless steel to the after market type 304 does anyone one know which welding material would be best between these two?
http://www.weldingmaterialsales.com/.../E308LFC-O.htm
http://www.weldingmaterialsales.com/...9/E312FC-O.htm
I wasnt sure on the material but the E312 type says it is capable of joining dissimilar metals. I am not sure if it would be more brittle than the E308.
Any ideas?
Safety Car
Joined: Feb 2002
Posts: 3,726
Likes: 368
From: Montoursville Pa
I was looking at this blue demon welding wire, has anyone used it?
Since it sounds like i would be welding the stock type 200 stainless steel to the after market type 304 does anyone one know which welding material would be best between these two?
http://www.weldingmaterialsales.com/.../E308LFC-O.htm
http://www.weldingmaterialsales.com/...9/E312FC-O.htm
I wasnt sure on the material but the E312 type says it is capable of joining dissimilar metals. I am not sure if it would be more brittle than the E308.
Any ideas?
Since it sounds like i would be welding the stock type 200 stainless steel to the after market type 304 does anyone one know which welding material would be best between these two?
http://www.weldingmaterialsales.com/.../E308LFC-O.htm
http://www.weldingmaterialsales.com/...9/E312FC-O.htm
I wasnt sure on the material but the E312 type says it is capable of joining dissimilar metals. I am not sure if it would be more brittle than the E308.
Any ideas?
Although flux core doesn’t work near as nice as using gas & solid wire.
The best advice I can give is to get some of the material you wish to weld and practice first.
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Verdad Gallardo
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,990
Likes: 12,385
From: NE South Carolina
The exhaust muffler and pipes are made from 409 stainless. More info than you'll want to know at the end of this PDF!
http://netwelding.com/Muffler_Rust.pdf
409 has been used for mufflers for many years. In fact when I managed an R&D lab for one of the largest welding/gas companies some years one of our engineers had a patent on the welding wire to join it! It contained a small amount of titanium.
It's inexpensive with about 10% chrome and little nickel (0.5%) unlike the 300 series with 18% chrome and 8% nickle. it rusts, just slowly!
It is welded by companies like Tenneco (who I believe make the C7 exhaust system) with a 409 type MIG wire. Most muffler shops use plan carbon steel-it works, just rusts more! Argon/CO2 shielding works OK but best with 8 to 10% CO2 not the normal 25%.
The C7 uses aluminized material that makes it look silver. That has a very thin layer of aluminum coating. It does last longer as outline in the PDF.
In Europe many companies use a better 439 stainless and 307 wire to weld it-both more expensive.
The exhaust pipes in most US made cars are also made of 409 stainless.
http://netwelding.com/Muffler_Rust.pdf
409 has been used for mufflers for many years. In fact when I managed an R&D lab for one of the largest welding/gas companies some years one of our engineers had a patent on the welding wire to join it! It contained a small amount of titanium.
It's inexpensive with about 10% chrome and little nickel (0.5%) unlike the 300 series with 18% chrome and 8% nickle. it rusts, just slowly!
It is welded by companies like Tenneco (who I believe make the C7 exhaust system) with a 409 type MIG wire. Most muffler shops use plan carbon steel-it works, just rusts more! Argon/CO2 shielding works OK but best with 8 to 10% CO2 not the normal 25%.
The C7 uses aluminized material that makes it look silver. That has a very thin layer of aluminum coating. It does last longer as outline in the PDF.
In Europe many companies use a better 439 stainless and 307 wire to weld it-both more expensive.
The exhaust pipes in most US made cars are also made of 409 stainless.
Last edited by JerryU; Nov 28, 2017 at 10:37 AM.
Safety Car
Joined: Feb 2002
Posts: 3,726
Likes: 368
From: Montoursville Pa
The exhaust muffler and pipes are made from 409 stainless. More info than you'll want to know at the end of this PDF!
http://netwelding.com/Muffler_Rust.pdf
409 has been used for mufflers for many years. In fact when I managed an R&D lab for one of the largest welding/gas companies some years one of our engineers had a patent on the welding wire to join it! It contained a small amount of titanium.
It's inexpensive with about 10% chrome and little nickel (0.5%) unlike the 300 series with 18% chrome and 8% nickle. it rusts, just slowly!
It is welded by companies like Tenneco (who I believe make the C7 exhaust system) with a 409 type MIG wire. Most muffler shops use plan carbon steel-it works, just rusts more! Argon/CO2 shielding works OK but best with 8 to 10% CO2 not the normal 25%.
The C7 uses aluminized material that makes it look silver. That has a very thin layer of aluminum coating. It does last longer as outline in the PDF.
In Europe many companies use a better 439 stainless and 307 wire to weld it-both more expensive.
The exhaust pipes in most US made cars are also made of 409 stainless.
http://netwelding.com/Muffler_Rust.pdf
409 has been used for mufflers for many years. In fact when I managed an R&D lab for one of the largest welding/gas companies some years one of our engineers had a patent on the welding wire to join it! It contained a small amount of titanium.
It's inexpensive with about 10% chrome and little nickel (0.5%) unlike the 300 series with 18% chrome and 8% nickle. it rusts, just slowly!
It is welded by companies like Tenneco (who I believe make the C7 exhaust system) with a 409 type MIG wire. Most muffler shops use plan carbon steel-it works, just rusts more! Argon/CO2 shielding works OK but best with 8 to 10% CO2 not the normal 25%.
The C7 uses aluminized material that makes it look silver. That has a very thin layer of aluminum coating. It does last longer as outline in the PDF.
In Europe many companies use a better 439 stainless and 307 wire to weld it-both more expensive.
The exhaust pipes in most US made cars are also made of 409 stainless.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 34,990
Likes: 12,385
From: NE South Carolina
Glad I found it! Not sure how- it was in my email!
Seldom look in the tech/performance section as I don't track and those that do don't need my "bench racing" comments!
Now if this was the old days and folks needed to set up a Holley double pumper, know what accelerator pump cam to use on primary and secondary etc etc, I would have useful input!
Seldom look in the tech/performance section as I don't track and those that do don't need my "bench racing" comments!
Now if this was the old days and folks needed to set up a Holley double pumper, know what accelerator pump cam to use on primary and secondary etc etc, I would have useful input!