Re: [TCML] Copper Tungsten Alloy

[Matthew Edwards <matthew.n.edwards@xxxxxxxxx>]

Thank you, my interest in this was because it is much cheaper online than standard tungsten rod. 

Matthew Edwards

On May 1, 2012, at 5:12 PM, Brandon Garretson <garretsontech@xxxxxxxxx> wrote:

> It'll burn up a lot faster.
> I use .250" 97% tungsten and it conducts just fine.
> After a long run I only need to wipe the carbon off, with that much copper
> you would need to grind the tips and re-adjust more often.
> 
> 
> 
> On Tue, May 1, 2012 at 3:47 PM, Matthew Edwards <matthew.n.edwards@xxxxxxxxx
>> wrote:
> 
>> I was wondering if anyone has tried using copper tungsten alloy for spark
>> gap. I have noticed some listed on ebay as grade 50-235 which appears to be
>> 70% tungsten, 30% copper. It seems like it would be a good material to use
>> but I wanted to get some "expert" opinions.
>> 
>> According to wikipedia;
>> 
>> CuW alloys are used where the combination of high heat resistance, high
>> electrical and thermal conductivity, and low thermal expansion are needed.
>> Some of the applications are in electric resistance welding, as electrical
>> contacts, and as heat sinks. As contact material the alloy is resistant to
>> erosion by electric arc. WCu alloys are also used in electrodes for
>> electrical discharge machining and electrochemical machining.[2]
>> 
>> There is a chart on this page displaying the properties of the alloy.
>> Resistivity, etc..
>> http://en.wikipedia.org/wiki/Copper-tungsten
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