Well the quetion say it all.

At the beging of the summer I attened a welding class at evening college. We cover oxy acyetaline welding (prob spelt wrong sorry), brazing and mig welding. From what I under stood from the lecturer brazing is mainly used on light stress joints because you are not getting the same deep penertation and fusing you get with welding. You have a beefed up solder joint. While I can see the point that you can braze together two diffrent materials in an homogonse frame why would you braze over welding?

Also when frames are welded they are alway seem to be tig welded. Why is this? I have spoken to several welders including the lecturer who tell me that once set up correctly you can mig weld steel, alu, stainless just as well as a tig welder and once set up a mig is much quicker. The only possiblty that they hinted at was that was that tig welding tends to be a prittier weld than a mig weld.

I am not trying to say I know better than all of you guys who have been doing this for years (as I after doing the course I realise how much there is to know) I would just like to understand the reaoning behind this. Could it to be down to wall thickness?

T