MAG brazing v. Furnace brazing - Brittleness question

[Steve Lawton]

I am having a problem with regards to selecting a process for an application.
Initally, the assembly was to be MIG welded but concerns of brittleness at the joint of the parts have neccessitaed that the joint is brazed. Intially I have been looking at furnace brazing but due to inconsistant fit up of the mild steels parts it does not look like I will be able to furnace the parts due to excessive gapping between the components.
The alternative that I am looking at is to MAG braze the parts which will fill any gaps that may exist between the parts.
However, the main concern that I have with this is that I am unsure if there will be an brittleness created with the MIG brazing process, as I am informed that if a furnace brazing method is used then the parent metal becomes annealed and thus removes any potential brittleness in the joint.
Please advise which process I should suggest.

Thank you

Steve

 

[hotrodder]

Brazing and gaps are two things that don't usually go well together
Annealing covers a lot of ground and is often a misused term when talking about carbon steels http://www.efunda.com/processes/heat_treat/softening/annealing.cfm
If brittleness is a concern i'm guessing we're not talking about plain ol' mild steels? What sort of section thicknesses and joint types are we talking about?