Mechanos
Veteran Member
What is the filler material that is usually used when brazing various components onto steel hydrualic lines? Is it a bronze filler? Silver-solder? This is for a working pressure of 2500psi.
Working with hydraulic hard lines - brazing
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J_J
Super Star Member
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I am not saying that you can not do the job your self, but I think I would take it off and take to a hydraulic shop to someone that does that for a living, or to a qualified welder.
There are kits to repair or splice hard lines.
There are kits to repair or splice hard lines.
oldnslo
Super Member
Silver solder is what is used on ORFS (O-Ring Face Seal) fittings. I have done these on 5/8 tube operating up to 5000 PSI with no problems yet. Connections must be extremely clean and oil free, also need to use a good flux like Harmon & Handy.
These are "socket weld" type connections. I would try any type of "surface weld" at those pressures.
Roy
OP
Mechanos
Veteran Member
I have a couple of hard lines on my tractor that are obviously brazed... and I have others that are obviously welded with what looks like a MIG weld. I could MIG them, TIG them or braze them. Just curious what type of filler was usually used for brazing. Thanks.
crash325
Elite Member
If you had to ask that question, the simple answer is "Don't Do It."
Follow JJ's advice and take to qualified shop for repair or replacement.
"Brazing" means "Brass" as a filler. Not all brass brazing rod is the same. Many different types for different material. Stainless requires special rod & flux.
The same goes for "Silver Solder". Silver content ranges from .06% to around 92%. Melting temp. starts at about 450 degrees and goes to a little over 1200 degrees. Many, many different alloys and types of flux.
Follow JJ's advice and take to qualified shop for repair or replacement.
"Brazing" means "Brass" as a filler. Not all brass brazing rod is the same. Many different types for different material. Stainless requires special rod & flux.
The same goes for "Silver Solder". Silver content ranges from .06% to around 92%. Melting temp. starts at about 450 degrees and goes to a little over 1200 degrees. Many, many different alloys and types of flux.
OP
Mechanos
Veteran Member
Uhhhhh.... that's why I asked.....
OP
Mechanos
Veteran Member
BTW... brazing does not mean "brass". It's a thermal joining process where a molten filler material is used to join metal parts through capilary action.
Soldering and Brazing
Thermal joining processes in which the molten filler metal is drawn into a capillary gap between two closely fitting surfaces. By definition:- Soldering takes place at temperatures below 450˚C and brazing above 450˚C. Both processes occur below the melting point of the metals being joined.
Silver Brazing
Is a type of brazing using filler metals containing silver that melt between 600˚C and 900˚C. Silver soldering/Hard soldering are terms synonymous with Silver Brazing (not soldering).
Fusion Welding
A thermal joining process in which the mating faces are softened or made liquid by the application of heat or pressure or by both. Filler metal with a similar composition to the parent metal may or may not be added.
Braze or Bronze Welding
A thermal joining process using a hand torch and filler metal with a lower melting point than the parent metals. The process uses copper based filler metals melting above 850˚C and does not rely on capillary attraction.
Soldering and Brazing
Thermal joining processes in which the molten filler metal is drawn into a capillary gap between two closely fitting surfaces. By definition:- Soldering takes place at temperatures below 450˚C and brazing above 450˚C. Both processes occur below the melting point of the metals being joined.
Silver Brazing
Is a type of brazing using filler metals containing silver that melt between 600˚C and 900˚C. Silver soldering/Hard soldering are terms synonymous with Silver Brazing (not soldering).
Fusion Welding
A thermal joining process in which the mating faces are softened or made liquid by the application of heat or pressure or by both. Filler metal with a similar composition to the parent metal may or may not be added.
Braze or Bronze Welding
A thermal joining process using a hand torch and filler metal with a lower melting point than the parent metals. The process uses copper based filler metals melting above 850˚C and does not rely on capillary attraction.
AKwelder
Silver Member
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i have mended a few over the years.
If they are used and dirty, Tig is a pain. You just keep boiling more oil and impurities up through the puddle. if you can get some type of overlapping joint i would use sil-floss. A brand of silver solder. with a good flux
I have had to arc weld some and even splice a couple with butt joints. i can be done, it just is a pain.
If they are used and dirty, Tig is a pain. You just keep boiling more oil and impurities up through the puddle. if you can get some type of overlapping joint i would use sil-floss. A brand of silver solder. with a good flux
I have had to arc weld some and even splice a couple with butt joints. i can be done, it just is a pain.
hizoot
Gold Member
actually....its sil-fos . I buy 15%silver content to use brazing copper.....and I buy alot of it as I do refrigeration/ac work. Last week, it was up to 115.00 a lb.
