JB Weld Steel over Solder

[kmobley]

Anyone tried using JB Weld (Steel) over solder? just wondering. I have been having issues with the main screw used to assemble my Robbe U47 staying strong under pressure. Is it maybe the solder I am using? Was wondering if JB Weld would give me just as good if not a better connection. Thoughts?

Any help and advise would be greatly appreciated.

Kyle

[bob_eissler]

Jb Weld is brittle and not what you want there. Silver solder is best and plenty strong enough if you get good contact and adhesion. Do not use electrical solder I had to use a torch to heat up that much metal. Be, careful when doing it. I have a scar on my hand that came from a ball of hot solder falling off.

[kmobley]

Good to know.. Think I have been using electrical solder maybe that's the problem.

Thanks

Kyle

[bob the builder]

I second the silver solder solution. Melts at low temps and is really strong. I also use liquid flux to great effect versus that paste stuff...

[crueby]

Gotta be clear on terminology - there is a lot of overlapping terms between low temperature silver bearing solder and the high temperature (1200F or more) silver solder, sometimes called silver brazing. The high temp version is VERY strong, I use it on my steam engine projects for fabricating engines and boilers. The lower temperature versions are fine for small parts without much stress, but is not in the same class structurally. Unfortunately, the language used for both is the same in many cases, and if you are web searching for silver solder you will get a mix of the two - look at the melting temperature of what you find before buying!