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Silver soldering problems

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julian atkins22/11/2013 10:08:00
1246 forum posts
353 photos

i dont agree with eric' s advice above. there are lots of silver soldering operations on all sorts of components and fabrications and boilers where the flame and gases from the flame are not in direct contact with the silver solder, the set up being heated from the opposite side of the metal to which the silver solder is applied. the flux cleans the joint and surrounding metal. in fact wherever possible i apply the flame on the otherside of the job to that where the silver solder has been or will be applied as there can then be no doubt of the silver solder flowing when the metal gets to the right temperature. rings of silver solder around boiler tubes is perhaps the best known example of this practice .



Speedy Builder522/11/2013 10:43:54
2494 forum posts
196 photos


Curious - On boiler tubes, do you mean put the rings on the inside of the boiler and apply the heat from the firebox side or put the rings on the firebox side and somehow get the heat to flow between the tubes on the 'inside' of the boiler. Same question for the smokebox tubeplate.

Bob H

julian atkins22/11/2013 11:33:52
1246 forum posts
353 photos

hi bob,

rings on the water space side around the tubes and heat from inside the firebox. there lots of other situations where you heat from the opposite of the metal from where the silver solder is applied. crown stay tops to outer wrapper being another example. my point is that the 'hot inert gases' as desribed by eric play no part in silver soldering.



Springbok22/11/2013 14:16:44
879 forum posts
34 photos

Go onto the CupAlloys site you will find everything you need


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