Abstract: The metal loading is sometimes regarded as a means of curing the manufacturing defects or the damage of the cast parts. In this direction and taking into account the high percentage of carbon, the parts out of pig iron and cast iron with graphite spheroid constitutes a rather difficult case. The principal objective of this study is the influence of the parameters of the annealing of softening on the mechanical characteristics and structure transformations of the samples into nodular cast iron, subjected to an assembly by welding with the oxyacetylene torch.