Use 45% Silver Solder to Braze Steel and Copper
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- Опубликовано: 26 июл 2024
- Clayton Peeples shows how to use 45% silver solder to braze steel and copper. Bryan explains the difference between his and Clayton's approaches.
Bryan only applies flux to the male end of a connection per most manufacturers' recommendations. He does that to avoid getting flux inside the lines. Bryan also avoids using the 15% silver rod altogether because it contains phosphorus, which doesn't react properly with steel. He would also flow nitrogen to prevent oxides from building up on the copper tubing and would protect the angle valve with a wet rag or Refrigeration Technologies WetRag to avoid damaging it. However, Bryan thinks that Clayton's overall process is very good.
Before brazing, Clayton cleans the copper and steel with sandpaper. Then, he applies the flux to the copper and steel. He mid-seats the valve to ensure that the seals don't get stuck during the brazing process. Clayton then uses a 10-20 mixture of acetylene and oxygen (respectively) for his brazing torch. He starts off by heating the copper, which allows the 45% rod to be drawn into the joint via capillary action. The final result is a clean brazed joint.
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be careful with the heat.overheat will ruin the flux.heat joint until flux takes on a water like appearance and then apply silver solder.
Good idea to store that full oxygen bottle right below your lit flame. Think I’ll try that.
A wet rag around the valve at the spindle end helps protect the gland packing
I Just reference this video on a job. I can confirm that 56% Uncoated also works. I did 5/16 copper to steal condenser coil. I also followed up with some 15%. The joint looked great. I used plenty of flux on the copper female end only. True Mfg. lowboy prep fridge.
Unfortunately I’m on a roof doing these not at a table in my shop. We’re dealing with steel hub compressors and it’s way harder to get in there than this. That’s the info I was looking for, but this video came the closest to helpful I’ve found. I’m going to try the sticks today and see how that works. Thankyou
Great information!!!
Great job
good video, thanks for that
Prefer flux core. When doing large size copper to steal the flux will burn off. Flux core applies the flux after the fitting is hot and prevents burn off.
Thanks for the Tips.God Bless
you have to really prepare your fit up well.cleaning the joint is an understatement.a lot of times,you ll get one shot at this.
Flux the pole not the hole.
Greetings from Poland :)
When using the 56% flux coated brazing, should you still use Stay Silv before?
I’ve seen on some txv it’s stainless and on the inside it’s copper could you use 15 or would you have to use 56 or 45
Thanks for video, but I know you need to heat the fitting then you heat the tube, because there is Aur gap between both that prevents a good heat transfer
My exam question what’s the flow point of 45 silver brazing rod
Anyone have answer for that ?
Why do you fast forward the welding part of the welding am asking because of those of us with ear problem, thanks.
Choose a slower replay speed when viewing sections like that.
Would anybody run 500 degree F thermal oil through copper with brazed joints with over 1000 degree F melting point solder? Just a temporary set up for about 6 months.
Did he switch solder from roll to stick?
Yes 45% to 15% silver solder
I don’t understand why somebody would put 15% on top of 45% silver? It’s completely unnecessary. The 45% silver flows well with the proper flux and I never had a joint leak.
What about nitrogen?
WOW! shocked no wet rag to protect the valve and no purging with OFN??😥
Re-upload?
Yes the other one got deleted accidentally
I was going to ask the same thing
Their wasant any protection on the valve either
The guy that was brazing this needs to go back to basics. What a mess? Whenever using emery cloth? Should always clean the loose abrasive material from the base metals before applying flux or soldering as thesesmallparticles areabrasive andwillend up in the circuit and contaminate. Should never apply flux inside the female joint in this case it was the steel valve body. Try not to apply flux all the way near the end of the male pipe. Always heat the steel and not the copper when adapting steel to copper. DO NOT TRY THIS PRACTICE!!!
Yeah, not sure where this guy learned these practices.
What would happen if you use 15 percent rod
Try it and let me know lol. I try it and it doesn’t work with 15 percent. Solder won’t flow into the steel joints
I’ve been a refer tech for over 45 years and I have to say that’s a pretty crappy looking silver solder job, I certainly wouldn’t have used it as an example for a video on the internet. And as for flowing nitrogen, that’s the least of this guys worries if that’s an example of his work!
Are you kidding?
#1 DO NOT get flux into the system which you did. #2 You trashed the valve - burnt the seals with no wet rag. to prevent the heat transfer to the seals. #3 No nitrogen means you contaminated the piping with carbon. Epic Fail!
STOP calling this "silver solder". Especially nowadays with no-lead low temp silver solder for plumbing, mechanical work, and electronics. this is SLIVER BRAZE