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Welding copper?

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KIP in MX
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Location: Trinidad, W.I.and Missouri

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PostPosted: Tue Oct 30, 2012 8:32 pm    Post subject: Welding copper? Reply to specific post Reply with quote

Anyone welded copper sheet? I want to make a copper tank/base for an Aladdin kerosene lamp from copper sheet and want to weld the seams. I have oxy/acetyline and Mig/Tig equipment. I don't want to use lead solder. Best advise?
 
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casenut1
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PostPosted: Tue Oct 30, 2012 9:01 pm    Post subject: Re: Welding copper? Reply to specific post Reply with quote

have never seen anything but solder on copper.
 
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JDseller
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PostPosted: Tue Oct 30, 2012 9:28 pm    Post subject: Re: Welding copper? Reply to specific post Reply with quote

Kip: Here is a link to a guy TIG welding copper. It is pretty neat. I had never seen it done before.
How to TIG Weld Copper Kevin Caron

 
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Stick welding
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PostPosted: Tue Oct 30, 2012 9:39 pm    Post subject: Re: Welding copper? Reply to specific post Reply with quote

TIG or silver solder will work. O/A might work but have never heard of it being used on copper. You might be able to find some info on the internet.
 
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Puddles
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PostPosted: Wed Oct 31, 2012 12:52 am    Post subject: Re: Welding copper? Reply to specific post Reply with quote


Interesting video! Until now I've never seen it done. Years ago when I worked as a weldor out of the sheet metal union I worked with several guys who had built copper hoods for commercial kitchen, the way they talked was just like the guy in the video, no big deal to Tig weld copper. I have also heard of using electrical wire, but also remember reading sometimes it can cause problems, but can't remember what! Embarassed
 
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JOB
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PostPosted: Wed Oct 31, 2012 12:57 am    Post subject: Re: Welding copper? Reply to specific post Reply with quote

He did not tell you that welding copper the way he did gives off fumes that are not good for you. You need good ventilation to weld copper.
 
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timcasbolt
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PostPosted: Wed Oct 31, 2012 3:16 am    Post subject: Re: Welding copper? Reply to specific post Reply with quote

He said it took 200 amps to get it going. That's a lot of heat!
 
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Bus Driver
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PostPosted: Wed Oct 31, 2012 3:41 am    Post subject: Re: Welding copper? Reply to specific post Reply with quote

I have brazed copper with oxy/acetylene. Works well. Never used TIG equipment. Interesting video.
 
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casenut1
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PostPosted: Wed Oct 31, 2012 5:02 am    Post subject: Re: Welding copper? Reply to specific post Reply with quote

that was 1/4 inch , looks easy. lets see it done with sheet copper , say 26 or 28 gauge. that's what i work with , bet it distorts all over the place.
 
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JDseller
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PostPosted: Wed Oct 31, 2012 5:30 am    Post subject: Re: Welding copper? Reply to specific post Reply with quote

Here is another video of a guy brassing copper, sheet,rods and lap joint.
brassing copper

 
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Butch(OH)
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PostPosted: Wed Oct 31, 2012 6:19 am    Post subject: Re: Welding copper? Reply to specific post Reply with quote

I have some bronze stick welding rod in the shop and it says it is good for copper.
 
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cd1
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PostPosted: Wed Oct 31, 2012 6:23 am    Post subject: Re: Welding copper? Reply to specific post Reply with quote

why not solder, it's easy, cheap and pretty strong.
 
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greygoat
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PostPosted: Wed Oct 31, 2012 7:51 am    Post subject: Re: Welding copper? Reply to specific post Reply with quote

Silver Solder, is it safe for food grade?
 
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Stick welding
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PostPosted: Wed Oct 31, 2012 9:23 pm    Post subject: Re: Welding copper? Reply to specific post Reply with quote

You can get cadmium free silver solder but check if it's rated for food service.
 
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Bud in WV
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PostPosted: Thu Nov 01, 2012 2:27 pm    Post subject: Re: Welding copper? Reply to specific post Reply with quote

I welded some copper buss bar and some copper nickle pipe years ago....it ain't pretty!
It takes a LOT of heat and it doesn't flow - at all! You can't "push" it with a TiG torch like steel, either. The "prettiest" Cu weld I've ever seen looked worse than a 2 hour beginner with a cold 7018.
Do yourself a big favor and solder it.
 
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