Heat exchanger

The present invention proposes a new design in the configuration of the attachment between the battery of tubes and the shell of a heat exchanger, improving the manufacturing costs and efficiency with respect to the exchangers of the state of the art. The present invention describes a heat exchanger and a process for manufacturing it, which combines the thermal fatigue strength of floating core exchangers with the compact, simple and more economical design of monoblock exchangers, resulting from, among others, a smaller number of necessary manufacturing steps.