Thank you very much,

I guess I just have to practice more on straight beads

Thanks a lot, that clarifies things for me ! Weaving is exactly what I try to do, as my uncle once recommended that. And when I get these slag inclusions I just go "maybe by making another pass over it it will go away" :D I will stop weaving and try stacking beads instead. Another question...

More info on the pieces :

I cut the cylinder from a plough tooth, so I guess it's spring steel, or at least some sort of carbon steel.
The flat surface is a piece of an I beam originating from a bridge, so maybe not mild steel but a much lower carbon content ?

Hello, thanks a lot for your answers, My rods are AWS E 6013; I don't know what that means, I just bought what was available at my local store without thinking. My welder is AC and, after just checking it, the current was more 80 than 90 A, something like 83 A. The steel I tried to weld in this case...

Hello everyone, first time posting on this forum, I weld for a hobby and learned by myself. I am still a beginner and my welds are ugly, but I want to understand why ! I use standard 2 mm steel welding rods and weld at about 90 A. I don't understand why I keep getting weld beads that accumulate only...