Hi guys- I have only been welding for a few weeks now and was trying out a few welds on some 1.5mm stainless exhaust 3 inch tube with my dc tig welder. I am using a 1.6mm tungsten and first tried to fuse each side of the tube together and then tried using some 2.4mm filler rods.
I tried about 40amps to start with for joining without filler and this seemed too low, i then upped the amps in varying stages but all I seem to be doing now is blowing holes in the metal. Using the filler rod I could lay down some ok yet quite thick welds but even then they were not coming out that great. I think I need to use a thinner filler rod- is it common practice to use a tungsten the same size as the filler rod i.e. for a 1.6mm tungsten I should use 1.6mm filler or 1mm?
I have looked up a lot of info on this site and on the internet and done a fair few welds on some sheet etc and they all came out ok but I just can't seem to join these two pipes without melting the edges and blowing holes. Has anyone got some advice on what setting to use and what I am doing wrong?
Thanks Andy
I tried about 40amps to start with for joining without filler and this seemed too low, i then upped the amps in varying stages but all I seem to be doing now is blowing holes in the metal. Using the filler rod I could lay down some ok yet quite thick welds but even then they were not coming out that great. I think I need to use a thinner filler rod- is it common practice to use a tungsten the same size as the filler rod i.e. for a 1.6mm tungsten I should use 1.6mm filler or 1mm?
I have looked up a lot of info on this site and on the internet and done a fair few welds on some sheet etc and they all came out ok but I just can't seem to join these two pipes without melting the edges and blowing holes. Has anyone got some advice on what setting to use and what I am doing wrong?
Thanks Andy