Correct me if Im wrong

[sandawgk5]

I ordered some exhaust hangers that are solid rod and I think they are 304 stainless. In order to weld these hangers to my aluminized exhuast that I am building I would need to us ER308L wire and it is OK to use 75/25 Ar/CO2.

If this is the case can I do the aluminized pipe with the stainless wire also? Not really needed as I am going to paint it all black just curious.

Ira

 

[85mudblazin]

No need for stainless wire. You can weld the stainless just like regualr steel but it wont be rust proof like if you welded it with stainless wire.
But since your going to paint it black it doesnt matter.

 

[sandawgk5]

No need for stainless wire. You can weld the stainless just like regualr steel but it wont be rust proof like if you welded it with stainless wire.
But since your going to paint it black it doesnt matter.

I thought regular wire would not stick to the stainless base metal? If I can use regular wire that is a bonus as a 2# spool of ER308L is like $30.

Ira

 

[blazinzuk]

I am in fact not a welding expert but I have welded stainless to normal steel and it has held just fine. It was a wheel well though so no real stress on it

 

[sandawgk5]

I am in fact not a welding expert but I have welded stainless to normal steel and it has held just fine. It was a wheel well though so no real stress on it

Well that is 2 that say just stick it. The weld in question would be 3/8" rod for exhaust hangers so no real stresses involved on the weld itself. I just remember as a kid I used the wrong rod when welding stainless and the filler did not stick at all it just fell off. Maybe with aluminized and stainless mixing together it holds..


Anyone else?

Ira

 

[tRustyK5]

Stainless to steel is fine with regular microwire. Welding the aluminized stuff is a pain unless you grind the area to be welded. So, figure out exactly where the weld is gonna be and grind that part of the exhaust tube and weld it up.

Rene

 

[sandawgk5]

Stainless to steel is fine with regular microwire. Welding the aluminized stuff is a pain unless you grind the area to be welded. So, figure out exactly where the weld is gonna be and grind that part of the exhaust tube and weld it up.

Rene

So run a flap disc on the area to weld to remove the aluminized and then regular 70s-6 will work?

Do you have any knowledge of the millermatic 140? It has a new thing where you set the material type and size and the welder adjust automatically but you can still adjust manually. It is slightly more expensive than what I have my eye on and it does not come with a cart.

Ira

 

[tRustyK5]

I haven't heard anything about the 140. The auto adjust might be really handy for someone that doesn't weld for a living as it'd get the machine into the sweet spot for what you're doing easily. Should save some headaches and farting around. That being said the MM 135 has a chart that will get you close quickly and easily too.

Rene

 

[sandawgk5]

I haven't heard anything about the 140. The auto adjust might be really handy for someone that doesn't weld for a living as it'd get the machine into the sweet spot for what you're doing easily. Should save some headaches and farting around. That being said the MM 135 has a chart that will get you close quickly and easily too.

Rene

I think I am gonna stick with the 135 as it is tried and true. Is my logic on welding the stainless hangers correct?

Ira

 

[readymix]

I have welded stainless hanger straps to 3" AL with no issues before.
The only time I have broken one off was when the exhaust shop tried to braze the hanger to the back of my FLO40?????

 

[sandawgk5]

I have welded stainless hanger straps to 3" AL with no issues before.
The only time I have broken one off was when the exhaust shop tried to braze the hanger to the back of my FLO40?????

Cool, When you get back intown if you live down this way Stoody is the place to get your welding supplies. They beat Airgas and Westair by aboot $60 on a 50 CF cylinder with gas. And they have a military discount. I asked about welders and they told me where I could get a better deal than buying one with them. To me that says something about the company as a whole.

Ira

 

[tRustyK5]

Sorry Ira, yeah just flap wheel the coating off the pipe and weld er up. I treat it the same as welding galvanized stuff.

Rene

 

[ntsqd]

Most ideal filler for stainless to carbon is 309, but nearly anything will work.