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Episode 4 is about the fillet weld. Christoph Deryk chooses a thick 3.2 mm electrode and switches to a more powerful welding machine with alternating current because he needs more heat, in this case 165 amps. The edge of the two metal parts must be as sharp as possible, there must be no air pockets, nor a root notch, which would be predetermined breaking points. The expert now shows a multi-layered weld. He determines how thick the final weld seam is using the A dimension, which would be 5-7 mm thick for the 10 mm component. Enjoy this episode...