Separating Brazed together parts???

[Darin Jordan]

I've never dealt with having to do this before, but I just received a tuned pipe for my HyperSport from a guy on Jim's and the guy has the pipe brazed onto the header... both stainless...

I've carefully ground away the excess brazing, but I need to know if I can heat the parts with an accetalene torch and have the brazing "flow" out, like solder would, of if it's going to take more to get these apart? I need the pipe seperated from the header so I can install it and maybe use a different header...

Help??!!

[egneg]

What is it brazed with?

[Darin Jordan]

What is it brazed with?

I'm not sure... it looks like it's "flowed" into place, so I'm thinking maybe a silver combo of some kind... Someone else mentioned that if it's silver, it should be able to flow out at 800-degrees... Otherwise, it's more like 1300... I guess I'll have to try it to find out...

[egneg]

Depending on the silver content and other metals such as cadmium it will melt (usually at a higher temp than what was needed in the first place) and more than likely will need to be pulled apart at which time some elbow grease will be needed to clean things up. Sometimes a bit of fresh brazing rod helps to get things started

[andym]

All steel should be silver soldered with 45% or better, whether mild, or SS. Just heat with oxy No6 tip will do and apply gentle pressure to part. You can do with a propane torch but takes a lot longer to come up to temp and the flames are larger that can cause unwanted distortion. I do a lot of silver soldering at work as well as brazing and welding and working with silver solder is easy

[Darin Jordan]

Thanks guys... the accetalene torch did the trick... Heated the joint up pretty much red hot and it just let go and pulled apart.

I appreciate the advice! Now I can move forward on fitting this into my HyperSport 48!