[Shop-talk] Separating copper

[steve hochschild]

In my experience, this doesn't really work for copper -- it transfers 
heat so quickly the delta between the inner and outer only lasts for a 
nanosecond, too fast for expansion to expand.

On 9/11/2012 11:57 AM, Mark Endicott wrote:
> How about freezing the joint to shrink it then heating the outside 
> piece quickly with a small jewelers torch to try to expand the outer 
> collar while the inner is still cold?  Eric, you probably have some 
> liquid nitrogen available don't you?  Maybe the expansion and 
> contraction would break it loose.
>
> Mark
> Nashville