Originally posted by chrisallse
how much more difficult is SS to weld than mild?
your correct they call it a Navtex Engine i think. it looks like an aerial cos all the electrics are built in
SS is tough stuff and its heat conduction is bu**er all. It does weld ok but it is more difficult to produce consistent and neat welds than in mild steel. For general mig welding you can use the same gas as for ms (argosheild light). It's not the ideal but the best product is only available in the largest cylinders. Your choice. The problem with the welding is that there is huge grain growth adjacent to the weld area and this fatigues very easily if there is even slight flexing.
I also have a tig welder and all my welding on the new boat will be done with this. As to whether it produces a more flexible result only time will tell because the boat is not yet on the water. Even then, the steelwork will be designed to reduce flexing in the weld areas, so any results will be inconclusive.