Originally Posted by
PaPa
The coupon sample below is .200" thick mild steel (was originally .250", but I had to grind off a lot of rust). The sample was then O/P brazed with off-the-shelf, 64,000 psi LFB in a single, 30 second pass using a #4 Victor alt fuel tip.
O/P brazed? That means with oxygen from a tank and regulator, or could that also be gas oxygenated by venturi system like in a plumbers acetylene torch?
And I`m surprised that you bevel so much for a braze. I always thought that butting two pieces by brazing was best with as little gap as possible and the most possible "almost contact" between the two pieces of base metal. Is my conception out of whack? When I braze other than filets, I usually just break the edges a little to let the filler flow easilly into the joint and try to have the two pieces of base pretty much together. Is that thte wrong way to go about it?