The other day I was doing some practice on an old wreck of a car by cutting a square out of a panel then trying to butt weld a new piace in. With the goggles on everything seemed OK, the puddle formed fine and the
2 pieces seemed to flow together fine, I thought my speed must be fine too as if I slowed down any I would blow a hole clean through both pieces (so I'm thinking it must be penetrating fine too)! I dip the filler rod in as and when required (which wasn't all that often along the top run. However after getting the top and bottom runs completed I saw that the top run ( requiring a minimum of filler still looked like 2 seperate pieces of metal and on grabbing with a pair of pliers and pulling just cracked apart, so there goes the idea of decent penetration. The bottom run (requiring more filler) was no better and the filler material had cracks all the way through it and most of the filler just cracked apart and flew off when given the attentions of a hammer.The car is just plain sheet steel and using ordinary steel (not stainless) filler rods (when buying the rods I told the guy what they were for and he gave me these rods, he's infinitlely more knowledgable on these matters than I :=) ) Any pointers greatly appreciated Thanks Jim