During the work, the metal structure is connected by various methods — the most reliable and simple method is the mating of manual electric arc. This technique was loved by professionals not by chance. In their opinion, it is she who is one of the most universal — the strength of the obtained rods is no different from such characteristics of monolithic material. The implementation of work on connecting steel surfaces involves the use of welding material of which the price of which in the retail network is openly low. Its purpose is to transmit the thermal pulse of the arc to the surface of the part.