Brazing alloys

[KNeilson]

I have quite a few varietys for different purposes. However I have never brazed parts on a gun barrel. It looks like I am going to have to some (brazing) on a current project so I would like to ask.........  what types or alloy(s) do you guys prefer to use..  thx.....  Kerry

[billd]

No expert here, but I wouldn't braze a barrel.   Solder it.

[Dphariss]

I have quite a few varietys for different purposes. However I have never brazed parts on a gun barrel. It looks like I am going to have to some (brazing) on a current project so I would like to ask.........  what types or alloy(s) do you guys prefer to use..  thx.....  Kerry

Can't braze with a brass alloy without bore damage temp far too high flow temp is over 1700 F. High temp silver solder (some refer to this as a form of brazing) can work but still a risk of scale if overheated. Manufactures use induction heaters to silver solder sights and such. Heats o joint so fast that it won't scale the bore just some color change.
If you need the strength I would use the paste that is 1000+ degree F silver solder and flux mixed.

Dan

[Scott Bumpus]

High Forcre 44 , get from brownells.  Low temp and holds very well.

[KNeilson]

 Dphariss, thx ,

1000+ degree F silver solder and flux mixed.

I have some of this. I have been involved in the metal joining buisiness (welder) for 30 something yrs now. What brazing means  to me is a process of cohesion where a lower temp material is allowed to flow into a joint by cappilary action.  I do not mean to use the term like using brass/bronze alloys with an O/A torch. If oxidation(scaling ) is the main concern I am comfortable I can deal with this. I was more concerned with altering the barrels heat treatment or possibly warpage. I am now guessing various silver alloys are what gets used most.......  Kerry
Scott Bumpus, thx, exactly the info I need, I`ll be ordering some for the cabinet..  K

[Dphariss]

High Forcre 44 , get from brownells.  Low temp and holds very well.

Try putting a front sight on a 41 or 44 mag pistol with soft solder High Force 44 might hold nut the factory uses high temp silver solder.
If you can find the sight you will clean it up and use high temp silver the next time.
I silver solder almost everything. Rod pipes, patch box hinges. Its a much better bond and I can colf solder to them if I want without fear.

But I do a lot of silly stuff.

Dan

[Captchee]

  as phariss stated  silver solder works very well. you will be suprised just how far alittle will go .
 as to brazing .  if you go to  Dynaflow  and look up the spec's on the diffrent rods , you will find a number  of brazing alloys that are  in the 1100-1400 range .
 read the specs pages  on the diffrent rods .

 while i have never seen a need  to go to that strong of rod , i do know that many of the the later  belgum SXS have brazed ribs.
 i know it can be done  but not sure of all the ins and outs

[doug]

     if I were going to braze onto a barrel, I would use what is locally named Braze 450 which is 45% silver, 55% copper and melts at 1140 and flows 100 - 200 degrees higher.  The brass brazing rod that I can buy in the local welding shop has never flowed well for me.
     I think whether or not the heat will affect the heat treating of the barrel depends on what steel it is made of.  I suspect there will be little effect on those made from 12L10 or similar.  A toss up whether it will affect those made from 4140 or whether or not the 4140 barrels are heat treated to begin with.  Main thing I would think would be to allow the barrel to cool slowly and possibly important to heat all the way around the barrel so you have a ring that is cooling rather than a patch

cheers Doug

[California Kid]

low temp silver solder like stay-brite is fine for lugs and sights on barrels. I think flows around 450 deg. I think its about 4% silver. Never had a problem with this type of solder for that job. hi-force 44 and the swif 95 paste solder from Brownells are similar. but pricier.

[KNeilson]

Gentlemen, thx for the responces. Exactly the kind of info I`m searching for. I was guessing silver alloys would probably be the best (strongest). I`m confident I can get the job done with them and control scaling, I`ll post some pics as it happens......thx ........  Kerry