The thinner the metal, the less current you need to set for welding it. But there are non-standard methods and solutions, I will show one of them. We will weld a 1.5 mm thick professional pipe with a 3 mm electrode at a current of 120 amperes.
For an example of such welding, I took a piece of a professional pipe 30 by 30 mm, the thickness of a poltorashka, I washed it down with a grinder with a 2 mm thick disc, we will weld this one.
Our electrodes are rutile coated, 3 mm thick. The welding current on my machine is about 120 amperes, I just worked at this current today, so I will not change anything.
Rutile-coated electrodes are well bent into an arc and thus the coating does not crumble. This is what we are doing, we will have arc welding!
To weld a thin profile, we need to work at the shortest possible arc length, we weld with a break. we also need to withstand the minimum possible time when the arc will burn and form the weld pool.
Therefore, we need to bend the electrode. Lit. the arc is minimally short, and quickly resting the electrode on its own curved surface, we interrupt the welding.
Welding has started! We weld with a separation, put a point, interrupted the arc, the point begins to fade. at this moment we put another point.
Everything. welded several centimeters of the seam, did not burn anything, the method is quite working for a thin profile pipe.
Friends, to make it clearer for you and with all the details, let's watch an 8-minute video, with a description of the details and the welding itself.