[TheForge] copper welding

[Ed F]

How was the warping?

----- Original Message -----
From: "RIES NIEMI" <Rniemi@fidalgo.net>
To: <theforge@mailman.qth.net>
Sent: Friday, August 22, 2003 1:35 PM
Subject: Re: [TheForge] copper welding


> I agree that actually making something out of copper would probably be
> better than making it out of steel and then plating it. All plating wears
> off eventually, and then you have rusty steel.
>
> A few years ago I had a job making a memorial out of copper, and we found
it
> tig welds quite handily. Takes a LOT of amps though- we had the syncrowave
> 250 turned up all the way, which is actually about 300 amps. Used hi-freq
> start, like you would for steel, dc, and my welding supply had copper rods
> which color matched just fine.
> It was a combination of 1/8" and 1/16" copper plate, and some schedule 40
> copper pipe, which is around 3/16" in wall thickness, and boy does it suck
> up the heat. The copper gets so hot that you cant even rest your hand on
it
> with those big silver cutting gloves on, so we could only weld a little
bit
> at a time and then let it cool off.
>
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