First time braising feedback?

[Kaizen]

Is that even how it's spelled? Icy acetylene braised two copper fittings. Seems sold but looks horrible. Any pointers or is this just how it looks till you clean it up? I had dust of some sort fall out when I turned it over. What was that?

Sent from my iPhone using Tapatalk

 

[fnieto]

Brazing if you used silver or brazing rod.
Soldering if you used solder.

You got it way too hot. You only need to heat enough to flow solder keeping the heat on the fitting.

 

[Kaizen]

I should have said what I was doing before. I'm making something from a 1inch cap and coupling. No pipe. It's going to be too hot to use solder so I braized it. I'm a pro at plumbing soldering. Still think I got it too hot? I did use rod


Sent from my iPhone using Tapatalk

 

[sixty4]

Pretty much how they come out. With brazing you really need to cook the joint to cherry red to get brazing rod to flow. Not bad looking at all. The soot that came out is normal with out a nitrogen trickle.

 

[Kaizen]

Thanks. That's what I did but both pieces were Cheryl red. Will use a smaller tip next time


Sent from my iPhone using Tapatalk

 

[matt_i]

Could also use 56% silver solder, its high temp stuff as well (can't recall exact but ~1000F), I find it "wicks" better than the classic bronze braze which tends to wet all over, prone to dripping and running and not really jump into a fit.

 

[Kaizen]

Follow up question. How the heck do I hold two cylinders of copper together to braize? my clamps tend to pull it off center. I also want to braize a steel bolt on the bottom of the copper. Sorry I'm used to a mig where I just tack it in place before working on it. again these are **** joints not pipe inside of a fitting which holds itself

 

[Thumper68]

You need to make a pipe alignment jig, clamp them in a piece of angle.

 

[Tinner]

Is that even how it's spelled?

Brazing is done to metal. Braising is done to food.

You were way too hot. practice on larger pieces and work your way down to the small stuff as your skills improve.

 

[Kaizen]

You need to make a pipe alignment jig, clamp them in a piece of angle.

won't the filler material run and stick it to the metal? and how do I get the other side? let it cool down, turn, and reheat?

 

[Oregon rock crusher]

Follow up question. How the heck do I hold two cylinders of copper together to braize? my clamps tend to pull it off center. I also want to braize a steel bolt on the bottom of the copper. Sorry I'm used to a mig where I just tack it in place before working on it. again these are **** joints not pipe inside of a fitting which holds itself

Sometimes something like this electrical strut or a similar homemade jig can be used to align tubing for but welding / brazing. Gives access to four sides without having to unclamp.

 

[mike13u]

Follow up question. How the heck do I hold two cylinders of copper together to braize? my clamps tend to pull it off center. I also want to braize a steel bolt on the bottom of the copper. Sorry I'm used to a mig where I just tack it in place before working on it. again these are **** joints not pipe inside of a fitting which holds itself

You clamp them in a V-block or a piece of angle iron so that they rest evenly and flatly in the V