Brazing Copper to Brass with Sil-Fos®

Рет қаралды 260,063

11 жыл бұрын

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HVAC/R, plumbing, and heat exchange components often involve a combination of copper tubing and brass valves, fittings, and parts. When do you need flux, and what brazing scenarios allow self-fluxing? How do you braze copper-brass components to achieve reliable joints that will perform well in the field? This video will give you step-by-step insights.

Пікірлер: 64

@cjrouse9508 4 жыл бұрын

Your flux cored rods work great. I was able to braze two razer blades together using your 18%

@Dusk-87 9 жыл бұрын

thank you sir

@walterbrunswick 6 жыл бұрын

You did not need to brush the flux all around the fitting once the tube was seated in the socket. Apply flux to the tube (and the inside of the female end) and insert. Apply flux where you want the SilFos to flow. The over-application of flux is what resulted in this being a very messy/ugly braze.

@ARCSTREAMS 4 жыл бұрын

flux also helps protect the parts from oxidation,so that is the reason he applied it all over where the heat was gonna be

@paulcastro1361 8 жыл бұрын

Hi there!! Thanks for the showing us how to use this flux. I've had a hard time trying to find a flux that can be used with oxyacetylene. But well, it seems I have found it! Now, could you please let me know what is the shelf life on this flux? Thank you for your information.

@nebraskaman8247 Жыл бұрын

If it dries out you can add water. It will lay a long time. Personally in this application the blue pre fluxed rods from johnstone would be easier.

@varunpratap6785 6 жыл бұрын

From where did the alloy come

@skydyverjym 7 жыл бұрын

please do a video on brass to brass

@Nab-Asn2803 3 жыл бұрын

Great vedio torches

@UltraHydrophobiccoat 5 жыл бұрын

I checked Sil-Fos which says you don't have to use flux

@ARCSTREAMS 5 жыл бұрын

flux also drives out the impurities to the surface,,btw is it possible to melt off a silfoss joint with propane air torch? a buddy of mine said he heated the tubing till it was cherry hot and could not melt the stuff ,some refrigeration guy laughed and told him he would never be able to with propane and needed to use acyt,,i think this is puzzling,,im not sure what that stuff was he could not melt off,because all you need is 600-800 deg C and prop is 2000 deg C

@babarsajjad47morning39 4 жыл бұрын

How much fil fos 15 and handy flux

@ARCSTREAMS 4 жыл бұрын

@@babarsajjad47morning39 ?

@ARCSTREAMS 4 жыл бұрын

@Jack Braddell what does that have to do with my comment?

@namegoeshere69 Жыл бұрын

Old Comment but propane and maps won't burn hot enough unless you add oxygen. Acetylene burns hotter on its own and is used to braze. Propane/maps- soldering, Acetylene- brazing

@ARCSTREAMS Жыл бұрын

@@namegoeshere69 correct but oxy/prop-mapp can braze too , i was easily able to melt off the silfoss braze on the refrigeration copper tube with a mini torch i made that my friend was not able to with his air/prop torch ,,btw i got a vid of the mini torch i made on my ch

@Einstein4palistine 2 жыл бұрын

Vasilen also work to start fire

@ArfurChrystsaik 2 жыл бұрын

Dogs breakfast indeed .

@348loadedlever3 6 жыл бұрын

Sloppy. Never apply flame directly to the flux, it needs heat up, boil, solidify and turn back to a clear looking liquid then you can continue heating till it melts the silver solder. you should not have globs all over when your completed.

@mtrltoolman 3 жыл бұрын

What about bronze brazing flux? How to know when it's ready for the filler rod to be melt?

@kennethdandurand3472 3 жыл бұрын

@@mtrltoolman Most Bronze rods now come with flux coated. I was taught about 1962 to heat the silver solder flux with a NEUTRAL flame until the flux dries and then re-liquifies as a good time to start getting your thoughts off the girlfriend and on to the most important job of your life. Treat all joints thusly and you won't ever have them fail. I spent 40 plus years brazing and silver soldering and never heard of one of my joints failing.

@lorenzo1962 7 жыл бұрын

ES OK LOVE

@Normanb15 3 жыл бұрын

Too much flux... am I missing something here? Seems like an excessive amount of flame and burning

@hvac1238 3 жыл бұрын

Wow that was rough, maybe dont use this as a basis for QC.

@WhiteBr34d Жыл бұрын

I've been soldering for 15yrs in a laboratory setting where our copper sees huge swings in temperature and pressure and holds up to this day. This is a very sloppy plumbing job, the extra flux can cause the joint to fail and develop pinhole leaks after some period of time. All that extra flux gobbed on is unnecessary. There should also not be big gobs of solder around the pipe that you started burning to black. Excessive and ugly mess. You should just see a thin ring of solder at the joint because that solder should actually wrap around the copper inside the brass female portion to create its seal.

@themechanic4222 7 жыл бұрын

use 45% very sample plus flux

@marksteven3534 5 жыл бұрын

45% good stuff but too expensive !!

@derrickgarcia303 5 жыл бұрын

The person brazing needs more practice.

@justinkendollrozinek 3 жыл бұрын

That's exactly what I was thinking and I don't even know how to braze very well. that's like the shittiest brazed join I've ever seen

@secretsplumbing9456 7 жыл бұрын

Hello colleagues. Our craft is not an easy one!

@amuvarshney 8 жыл бұрын

What is the parameters for such kind of brazing, like oxygen pressure? LPG Pressure? and flame length? required temperature? etc. Plz tell me on my email ID. Thanks

@jequialzumoncar7178 5 жыл бұрын

😎😎

@AlaskanMonroe 3 жыл бұрын

What a mess.

@miguelnavarro3830 7 жыл бұрын

That is a terrible finish job...!!

@lucasmilhauptbrazing 7 жыл бұрын

Ouch...!!

@samlenthall5803 6 жыл бұрын

I agree the joint looks horrible and it was only capped.

@milosrastovac 6 жыл бұрын

I can do a better job and I was just certified last week lol

@stizandelasage 6 жыл бұрын

and spray paint the pipe let me just put my two cents in and spray paint the pipe

@cheesebob1212 3 жыл бұрын

Im so curious, why

@keganmitchell6262 7 жыл бұрын

Very sloppy. Flux clogs Txv's and power Pistons. Also In correct flame. 7 on the acetylene 20 on the oxygen "psi"

@lucasmilhauptbrazing 7 жыл бұрын

Kegan, this video is for use across a wide range of applications. The flux needed in each use varies. If you are having issues with clogging components within the system you are brazing, then limiting flux and alloy quantity indeed could be an option. The flame used in this video is a reducing flame. We recommend setting your line pressure at the tank body to 5-7psi acetylene and 15-20psi oxygen. This torch is set to that pressure (which you also recommend, so we agree on this point). It is not possible to tell the line pressure from the flame appearance, because the gas ratios are regulated at the torch handle after the tank body. The regulation at the torch handle sets the flame type, not the line pressure at the tank body.

@milosrastovac 6 жыл бұрын

I just go by what the flame looks and sounds like. I don't have a gauge to set it to those settings perfectly.

@treverkirk8110 5 жыл бұрын

Also the required acetylene and oxygen pressures depends on the torch tips type and size

@alexdemartine4758 5 жыл бұрын

I don't know why these how to braze videos always show the person using a wet cloth. Your supposed to use a piece of Emory cloth or sand paper.

@lucasmilhauptbrazing 5 жыл бұрын

Alex, We recommend emory or wire brush to prep the joint. Afterwards, the wet cloth/rag is used to remove the flux.

@alexdemartine4758 5 жыл бұрын

@@lucasmilhauptbrazing Whatever still a shoddy brazing job.

@Threefingered 2 жыл бұрын

This is the nastiest brazing I've ever witnessed. Did you ask a blind monkey to fill in at the last minute for a real plumber? Horrible!

@Blazinasian89 5 жыл бұрын

Did he braze that with his eyes closed sheesh that was ugly and I never seen anyone flux before brazing only when soldering I could be wrong but I’ve never fluxed anything I’ve brazed

@hvachessler 4 жыл бұрын

I don't flux copper to copper but copper to brass will give you problems without flux. Copper to steel also requires flux.