You have to get the machine settings just right, and the length of time for each tack is very important. Don't worry if when you start to practice you find it just blowing through - we've all had this. This is even more important with gasless wire, as the arc tends to be a bit harsh compared with gas wire. ![]() Without it some thin metal welding is almost impossible unless you have a very professional machine. Second, do study the tacking or stitching technique, as BB already pointed out. This takes lots and lots of practice to get just right. With practice this can be avoided by starting the arc on the thicker metal, moving across onto the thin original metal briefly, and then back again. You could try 1.5mm, which on its own is easier to weld, but if the metal you are welding to is only 1mm or even worse 0.8mm, there will be a tendency to blow through the original thin metal before the new thicker steel has melted properly. So I think you'll be looking at around 1mm or maybe 1.2 at most for panel patches. The Ford Fiestas I've worked on have always had thin metal, even on sills. You're too modest BB, you're dishing out pretty good advice!įirst, metal thickness. ![]() But sometimes you can't do this, and in those situations you'll find gasless flux-core wire can do the job, but needs quite a lot of practice first.Īlthough I'd always use argon/CO2 mix by choice, there are those on here who do bodywork very well with CO2 alone, so it varies a great deal on preference and experience. ![]() Using it on anything less than 1mm is an art that has to be learned through much practice, and it helps if you can place some kind of heat sink behind the joint to be welded, like brass, copper, or alloy scrap.Īs said, using gas wire with argon/CO2 mix is easier if there is no wind, or if you can rig up a decent shelter. This is fine on down to 1mm bodywork so long as you get the metal very clean, and cut back to clean metal beyond where the rust pits through the metal from the other side. The best (probably) of the 0.8mm flux-core wire is made by Lincoln, called Innershield NR-211-MP, at. You are incorrectly informed the smallest diameter flux-cored wire you can get is 0.8mm.
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