Abstract: An articulated pair of spot welding tongs comprising two supports (1,2) of the male and female type, each having a fork joint and an orifice, and two interchangeable arms (3,5), each carried by one of the supports. Each support is made from aluminum and treated by hard anodizing. A pin (13) traverses the two orifices, and carries two plates (39,40), each plate comprising a metal support plate covered by a coating based on fluorocarbonated fibers. The welding tongs can be used for a long period of time without any need for changing the insulating elements.