@horty
Hey Tim, how do YOU use the three different fluxes?
1) Is it a fixed ratio mix used thru-out the braze process?, if so what's your recipe?
NONE
2) Do you use one type for "tinning" and then another during filling?
YES & NO, Us #1 Blue Most Of The Time.
3) is ther some visual trigger that makes you switch between them?
YES
Just a Note:
I use #2 and #3 Hi-Heat for some exhaust manifold work, or use cast Iron rod with #2 and #3, I sometimes grind out crack but usually dont, I use excess heat and melt out the crack as I go,, Different Process.
Thanks for any additional pointers.
-brino
I'll do the best I can, haven't felt well for a few day, old ticker problems..
No special recipe.
During tinning, I will use a little of each, just a touch on the rod, sometimes the impurities in the cast will cause problems tinning, so to be sure the tinning takes place, It's a habit for me to use a little of all three.
You can tin the area to be welding all at one time if you want, or just go ahead a little bit, I usually go ahead a little bit and then do some filling, then some of that process is done, then you can concentrate on filling that area, if at any time you see that the brass is not flowing smoothly, a touch of all should take care of the problem.
If you see the part is cooling down to fast, heat it back up, I always use a big tip, bigger than you would think for some parts, that way the heat is always there, and by manipulating the temp at the tip, (which is done constantly, for me, by and moving the flame quickly in and out of the area also controls the heat/temp. What ever you need to do to keep a nice red heat or close to red heat and to keep the brass flowing nicely, dont try to fill a spot that wont tin, its possible to cover that area up to not be seen with brass but there will be no tinning underneath, I just concentrate on the area I'm filling.
Use to weld 4 ft cracks, 3" wide after ground out, in giant earth moving equipment transfer cases, what a very hot job, sometimes face shield would melt and face would blister, that was in the early 70's, but then It was hard to find anyone to do that type of work, so $4-5 thousand dollars was nothing to an oil field company for 2 days work, when the new part was 15-25 thousand dollars and 2 months to get it from overseas.
That's about it, and don't breath in the fumes to much, could cause some health problem, for me it made me drink alot of cold beer after a days work, or if I had sore arms and shoulders I would rub alcohol on them from the inside out.
If somethings don't make sense to you I apologize, this is the best I can do considering how I feel.
If you trust me and want to send me your private email, I might have some stuff to send you...
Hope this helps you
Have a good day,
Tim
Sorry, didnt mean anything Bad, at my age somethings aren't as they appear, 
