With the variety of metal alloys available today, it is extremely important to have detailed knowledge of their mechanical properties so that there are no mistakes in their applications. Among these properties is hardenability, which is assessed using the Jominy Test, currently standardised by ASTM A255-10. This test provides graphical data in a curve called the Jominy Curve. The hardenability of a steel consists of its ability to transform into martensite, the microconstituent with the greatest mechanical strength capable of being formed in this alloy. The formation of martensite depends on the chemical composition and microstructure of the austenite for transformation outside the thermodynamic equilibrium conditions (cooling rate), exploiting this, during the Jominy test a variation in hardness is produced along the specimen. By means of statistical calculations, this software constructs the Jominy Curve graph from the input of data on the chemical composition of the alloy of the ferrous materials (steel) that are subjected to the test. It also offers a comparison between the calculated and experimental values and the generation of PDF reports.