[modeleng] Re: TIG welded copper boilers

Nah mate, probably older - I did the courses later in life - 'bout 20 
years ago.
Barrie Purslow wrote:
> Tel,
>
> You must be younger than I thought.
>
> When I was a young apprentice at one of our country's foremost engineering 
> companies (Metropolitan Vickers), I recall spending some time in the 
> Fabrication Dept. where all types of welding were carried out, some of it 
> for Nuclear Plant. When I asked if copper could be welded I was told that it 
> was impossible and always would be! I think the "reasoning" was that the 
> thermal conductivity of copper was such that heat was conducted away from 
> the welding site so rapidly that it was not possible to obtain sufficiently 
> high temperatures.
>
> But, times change, the huge Metrovic's site has been bulldozed, and fullsize 
> steam locos have their copper fireboxes repaired by welding.
>
> Regards,
>
> Barrie
>
>
>   
>> Yep Barrie, one of the things they taught us in tech way back then, was
>> that copper is one of the few 100% weldable metals
>> Barrie Purslow wrote:
>>     
>>> Alan,
>>>
>>> Several years ago a TIG welded copper boiler turned up at the Urmston 
>>> club.
>>> It had been made by one of the leading boiler makers in the U.K. who was
>>> producing all their boilers by this technique - can't remember their name 
>>> at
>>> the moment. The club boiler inspector did some tests on the boiler and on 
>>> a
>>> sample piece of weld. The conclusion was that the weld was as strong as 
>>> the
>>> parent metal.
>>>
>>> Barrie
>>>
>>>
>>> ----- Original Message ----- 
>>> From: "Alan Stepney" <alan@xxxxxxxxxxxxxxxx>
>>> To: <modeleng@xxxxxxxxxxxxx>
>>> Sent: Friday, October 24, 2008 10:09 PM
>>> Subject: [modeleng] TIG welded copper boilers
>>>
>>>
>>>
>>>       
>>>> I see that Maxitrak have started selling TIG welded copper boilers.
>>>>
>>>> Anyone have any thoughts on that, instead of the usual silver soldering?
>>>>
>>>>
>>>> Alan
>>>> MODEL ENGINEERING DISCUSSION LIST.
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>>>>
>>>>
>>>>         
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>>>       
>> MODEL ENGINEERING DISCUSSION LIST.
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>>     
>
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