Joining stainless steel exhaust components

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9 years 1 month ago #8088 by JRI
Joining stainless steel exhaust components was created by JRI
I am making a custom exhaust header for my Mig3 and 3W 55i using 25mm stainless components and flex header tube. What are the best materials and tools and techniques for soldering/brazing the parts and where is the best place to buy them from?

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9 years 1 month ago - 9 years 1 month ago #8091 by
Replied by on topic Joining stainless steel exhaust components
You can use standard softsolder if you use Phosphoric Acid as a flux.

It is also easier than copper/brass because of the lower heat conductivity of stainless steel.
Last edit: 9 years 1 month ago by .

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9 years 1 month ago #8094 by Phil Ford
Replied by Phil Ford on topic Joining stainless steel exhaust components

ronp849 wrote: You can use standard softsolder if you use Phosphoric Acid as a flux.


Where would one get the acid from? I have needed to weld stainlessitems before and have had to take it a specialist welding shop

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9 years 1 month ago #8097 by DavidTappin
Replied by DavidTappin on topic Joining stainless steel exhaust components
Ron wrote "You can use standard softsolder", I tried soft solder in a similar situation years ago, it lasted about 30 seconds until the heat of the exhaust turned it extra soft, even actual runny!

How about silver solder?

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9 years 1 month ago #8098 by
Replied by on topic Joining stainless steel exhaust components
Now I have read the original post properly, I can see that soft solder would not be suitable!!!

It seems like Phosphoric acid can be used with silver solder as well but I have not personally tried it.

www.bssa.org.uk/topics.php?article=150

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9 years 1 month ago #8151 by kevinross
Replied by kevinross on topic Joining stainless steel exhaust components
Ive dome a lot of SS exhaust work and always use this flux - it does what is says on the label



I recommend this company for your Silver Solder

www.cupalloys.co.uk/medium-temp-silver-solder/index.asp

I have an Oxy / Mapp gas facilities if you want me to solder it for you.
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