Thread: Non corrosive flux for silver solder ?

Can anyone advise where can buy non corrosive flux for low temperature silver solder ?

Maybe someone on here who does electronics will be able to help.

Working with GWS for a solution
Also been in touch with Warburtons but theirs is in tiny containers for jewellery makers

But hoping there is a better solution out there as I need about 1 Litre

How low of a temp are we talking? I'm assuming somewhat lower than ezyflo. What are you joining?

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Originally Posted by Davecbnz

How low of a temp are we talking? I'm assuming somewhat lower than ezyflo. What are you joining?

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240 ºc

Originally Posted by mimms2

If your prcess is good there should be no trapped flux pockets to rust out. A solid rinsing, drying and oiling after.
Cigweld do fluxes in half litre jars, any enginnering or welding shop should have.
NB:all theory for me, my metal gluing skills is pretty average.

Yes I know it can be cleaned up.
But I'm laying double rifle top and bottom ribs so anything left is trapped in a void and could ultimately become a problem

It would just be nice to have a non corrosive flux if available

i get mine from radio spares or element 14
this stuff does silver solder very well:

https://nz.rs-online.com/web/p/solder-pastes/0555232/

Frank ford arsenal clean cast. Available from reloaders

if you tin each surface before you start you wont have that issue. Then after they are cold enough to work, clamp them together and reheat until they are stuck. need good matching surfaces obviously.
There will only be the solder in there and at the worst you could add some more in with your wire when its hot.
Is this possible?

Do it the traditional English gunmakers way and use resin flux. Brownells do a high strength lead-free solder (silver/tin) called Force 44 that is perfect for the job. The surfaces are dressed clean and neat-fitting then fluxed and tinned, the assembly is wired and wedged tightly together, then the whole job is done in one hit in a big oven or muffle furnace. Laying the ribs is the last thing done after the barrels have been test-fired and regulated on a range. Regulation involves a rudimentary set of temporary sights and a soldered muzzle wedge which is adjusted as required to bring the two barrels to the same point of impact at the desired range. This is one of the jobs that makes double rifles so expensive! Spare a thought for the gunmakers that had to regulate the .600 Nitros!

@mimms yup I get that. My interpretation was using flux while they are together after the question about the voids. If I misinterpreted that then my bad. If you flux it and tin them first there would be no voids

Originally Posted by gundoc

...The surfaces are dressed clean and neat-fitting then fluxed and tinned, the assembly is wired and wedged tightly together, then the whole job is done in one hit in a big oven or muffle furnace. Laying the ribs is the last thing done after the barrels have been test-fired and regulated on a range. Regulation involves a rudimentary set of temporary sights and a soldered muzzle wedge which is adjusted as required to bring the two barrels to the same point of impact at the desired range. This is one of the jobs that makes double rifles so expensive! Spare a thought for the gunmakers that had to regulate the .600 Nitros!

Just rewatched the Holland & Holland video on YouTube showing this exact process. Fantastic.

Originally Posted by ishoot10s

Just rewatched the Holland & Holland video on YouTube showing this exact process. Fantastic.

I will start having a decent look on line this weekend
It's been crazy busy and I haven't had a lot of time and mainly it hasn't bloody well rained for ages !
At least when it rains I can have some screen time

Hi in Christchurch I find the guy at weldworx pretty helpful and knowledgeable give him a call tomorrow if he dosen't have it he should be able to point to another supplier, or maybe DC cunnighams.

Originally Posted by akaroa1

I will start having a decent look on line this weekend
It's been crazy busy and I haven't had a lot of time and mainly it hasn't bloody well rained for ages !
At least when it rains I can have some screen time

Regulating at 10:00... https://youtu.be/qUXoNUzAyvk

Brownells won't air freight flux or sent off shore

And any way I would like to "Buy Local"

https://nz.element14.com/aim-product...solder%20paste


there ya go.