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Old 04-01-2009, 12:43 PM   #1
baer19d
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Default Stainless steel question

What kind of stainless steel are beer kegs made of? Is it 304 stainless? Also does anyone know if a flux core wire is made for this kind of stainless and if so where can I buy it? Thanks, Mike
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Old 04-01-2009, 12:48 PM   #2
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I wouldn't weld a keg with flux core wire you really need to back gas your welds when you weld a keg it will make a mess on the inside otherwise.

Pat
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Old 04-01-2009, 01:08 PM   #3
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I wouldn't weld a keg with flux core wire you really need to back gas your welds when you weld a keg it will make a mess on the inside otherwise.

Pat

I agree. Also most kegs are made of 304L stainless.
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Old 04-01-2009, 01:59 PM   #4
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I had to go to a couple of different welding supply places to find the wire.

Reason: new thread
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Old 04-01-2009, 08:46 PM   #5
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316L filler wire will work for you also...
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Old 08-03-2009, 09:04 PM   #6
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I am trying to put a couple in a keggle using a propane torch and some silver solder prepping it with some liquid flux.

I don't have the ability to tig weld so I thought this should work for stainless steel. What do you think?
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Old 08-03-2009, 09:30 PM   #7
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I am trying to put a couple in a keggle using a propane torch and some silver solder prepping it with some liquid flux.

I don't have the ability to tig weld so I thought this should work for stainless steel. What do you think?
Silver soldering absolutely works providing you have the right flux and your torch gets hot enough.
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Old 08-03-2009, 09:38 PM   #8
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Silver soldering absolutely works providing you have the right flux and your torch gets hot enough.
Well I went to the welding shop as I had to refill the CO2 anyways. I got a kit with liquid flux and a small amount of solder. I told the workers silver solder and that is what they gave me so who knows.

I have this torch:



I got a blue tank with it but it sounds like I should get the yellow tank for this job.



MG9 - 16.92 oz. Fat Boy Max Power Propylene Fuel Cylinder (MG9)

* Ideal for medium to heavy soldering and brazing
* Flame temperature in air = 3600 F
* 20% more fuel (than standard 14.1 oz cylinders)
* Recyclable
* Lower profile
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Old 08-03-2009, 10:03 PM   #9
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I have used the SafetySilv 55% silver- no cadmium type silver brazing material for thin wall stainless connections, the lower silver percentages will often contain toxic levels of cadmium as an alloy component to reduce melt temperature. You will need StaySilv flux to go with the silver filler material, a white paste that you apply to both the inside and outside of work area to keep metal from discoloring. The Mapp gas torch is more than adequate for the silver brazing, the main thing to watch for is keeping the metal temperature no hotter than the dark red color, hotter and the chrome starts to oxidize and will not accept solder. If you overheat an area, cool it down and sandpaper it back to clean metal, apply paste, and try again. If you have the top from keggle conversion, practice on that then do the keggle.
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Old 08-03-2009, 10:26 PM   #10
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I have used the SafetySilv 55% silver- no cadmium type silver brazing material for thin wall stainless connections, the lower silver percentages will often contain toxic levels of cadmium as an alloy component to reduce melt temperature. You will need StaySilv flux to go with the silver filler material, a white paste that you apply to both the inside and outside of work area to keep metal from discoloring. The Mapp gas torch is more than adequate for the silver brazing, the main thing to watch for is keeping the metal temperature no hotter than the dark red color, hotter and the chrome starts to oxidize and will not accept solder. If you overheat an area, cool it down and sandpaper it back to clean metal, apply paste, and try again. If you have the top from keggle conversion, practice on that then do the keggle.
I am beginning to think I was sold the wrong type of solder. I remember it saying contains no silver yet all this stuff says that it should while working with stainless steel.

Is there any main chain store I may have that would sell Harris products like StaySilv and SafetySilv?
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