The 4F position is often considered the most difficult of the basic welding positions (1G, 2G, 3G, 4G/F).
In the 4F welding position, the weld is made on a vertical surface, and the welding gun or torch is moved in a horizontal direction. This position requires a high level of skill and technique, as the weld pool is subject to gravity, which can cause the molten metal to sag or run. 4f welding position full