Stainless Ferrules to Copper pipe using solder not braze?

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Stainless Ferrules to Copper pipe using solder not braze?

Postby vossy » Fri Dec 01, 2017 9:28 pm

I have some 4, 3 and 2 inch stainless ferrules, copper pipe is expanded and I cannot get the solder to take.
I am using aquasafe lead free solder, have tired bakers solder flux fluid and 801 liquid flux. Using Mapp gas torch.
Have even tired this method http://homedistiller.org/forum/viewtopi ... =2&t=46881 but the solder is too large. Surely someone can help me out
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Re: Stainless Ferrules to Copper pipe using solder not braze

Postby Doubleuj » Fri Dec 01, 2017 9:39 pm

Stainless to copper is hard, I tried and tried and ultimately failed, but there are many here who have succeeded and will pass on their tips. Don’t be discouraged. :handgestures-thumbupleft:
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Re: Stainless Ferrules to Copper pipe using solder not braze

Postby bluc » Fri Dec 01, 2017 9:56 pm

I have not had an issue so far done 4-5 joins seems to flow fine.
I dont think my flux is 801 think its comweld 965.
If your flux is boiling off and when solder is touched to job it doesnt melt then your applying to much direct heat.
Heat it more indirectly and always at the heaviest duty part ie stainless ferrule..
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Re: Stainless Ferrules to Copper pipe using solder not braze

Postby bluc » Fri Dec 01, 2017 10:16 pm

I have to do some copper to stainless hard solder since i left some gaps with my sub par fitting skills...should be interesting :scared-eek:
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Re: Stainless Ferrules to Copper pipe using solder not braze

Postby scythe » Sat Dec 02, 2017 6:40 pm

Good luck bluc, solder is not a gap filler and does not build up, like welding does.
Try using gravity to your advantage if you can.
Ie have the gap at the lowest point so any pool that forms will be at your gap.
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Re: Stainless Ferrules to Copper pipe using solder not braze

Postby bluc » Sat Dec 02, 2017 6:45 pm

I found hard solder fills gaps pretty easy(on my rc) soft solder is hard to get bridge happening..
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Re: Stainless Ferrules to Copper pipe using solder not braze

Postby Magnus » Sun Dec 03, 2017 10:04 am

I found it rather easy really, I expanded the copper to a nice firm fit with ferrule then cleaned both parts well applied flux to both parts and pushed them together then wrapped solder all the way round the join then fluxed again. Only ever heat the copper, never let the flame go near the SS or the solder, heat gradually all the way round till the flux starts bubbling and apply more flux then heat till the solder melts and gets drawn in, have more solder ready to top up all the way round.
Remember to never heat the SS part or it wont work.

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Re: Stainless Ferrules to Copper pipe using solder not braze

Postby scythe » Sun Dec 03, 2017 3:29 pm

That has been my experianve as well magnus.
Keep the flame away from the stainless, copper will transfer the heat.
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