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Thread: welding copper
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8th February 2006, 08:34 PM #1
welding copper
can anyone suggest a good reference, information or preferably a person from which i could learn how to weld copper of the wire or thin sheet variety?
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9th February 2006, 12:36 AM #2
See here for the previous discussion:
http://www.woodworkforums.ubeaut.com...ad.php?t=24496
In short, braze it rather than weld it. Or even silver solder it...or even solder it if it doesnt need to be all that strong.
Otherwise, its pretty much like welding aluminium except you have to preheat the copper for best results. For thick material, this makes it rather hot work.
You'll find more than you'll ever want to know here:
http://www.brazing.com/techguide/pro...er_welding.asp
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9th February 2006, 03:36 PM #3Originally Posted by Master Splinter
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9th February 2006, 09:17 PM #4
sorry, should have done a search first, thanks for the replies people, have had no experience welding anything, starting from scratch, i get from roaming around the internet that their is plenty of if and buts about copper welding so i'm just sorting at the moment, thanks again, seeya
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9th February 2006, 10:38 PM #5
Copper TIG, easier than lots think, sometimes a colour variation depending on the chance of different alloys of ur material or filler, and is as easy as a few more amps, well quite a few more amps, i guess depends on the thickness of ur job. Here's an interesting thing to try, if ur into TIG, try welding brass with silver solder as ur filler rod, looks like a tig weld, but with silver, strong, and works really well, maybe u could use that to weld ur copper, but i have used plain old copper wire as filler before. Best way to learn TIG, is heaps of practice.
It's Ripping Time!!!
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26th July 2008, 12:13 AM #6Novice
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do you use ac or dc tig for brass copper?sean
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26th July 2008, 10:13 AM #7
DC is what you need.
Something else i have come across since the previous post, and it does depend on the particular alloy of brass you are useing, is that the high heating levels created in TIG will cause the Zinc in the Brass to burn and will cause the milky residue left behind, and of cause will change the alloy somewhat... I have seen some Brass done with very little milky residue and some with quite a lot, but depending on the application it may not be a problem at all.It's Ripping Time!!!
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28th July 2008, 09:16 AM #8
For tigging copper
DC -, Ar or Ar/He gas, thoriated electrodes (Zirconated would be OK also) , nice sharp point.
Hit it with a good belt of heat then go like blazes.
Blends nicely , your can at a pinch use silicon bronze mig wire as a filler but your better off with deoxidized copper rod, if its is an alloy use off cuts of your material as filler.
Scotch brite pads to prep. No flux .
Gets hot quickly so you will have to be prepared to stop.
Brass I would try to blend only depending on application,A good guess is better than a bad measurement.
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24th August 2008, 09:19 PM #9
Yup u can Tig Copper
Copper definitely lends itself to being Tig welded.
The problem with Copper is that its a tremendous conductor of heat and requires a lot more heat input to form a weld puddle than with other metals.
So essentially U got to have access to a Rig that allows you to crank up the Amps!
When tiging Copper its welded with a DC electrode negative power source just like most other metals. Use a thoriated tungsten electrode!
For best results the filler wire required is a special deoxidized copper filler rod specially designed for tig welding (You would probably have to special order this!)
REgards LouJust Do The Best You Can With What You HAve At The Time
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6th September 2008, 08:45 PM #10Novice
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Jesse James in one of his episodes from his series Monster Garage, made a custom bike fuel tank from copper sheet. He used his English wheel to form and shape the 2 bowls. He then used strips of copper waste that was left over from using the air nibbler as the filler rod. He TIG'd it together and the welds were perfect and the tank did not look like it was welded at all.
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