This course offers a comprehensive exploration into the principles of steel microstructure development and the role of alloying elements in shaping final product performance. Integrating metallurgical theory with practical simulation and calculation exercises, the modules guide learners through atomic diffusion, transformation rates, and grain evolution in steel. Learners will classify alloy types using Fe phase diagrams, analyze microstructural outcomes across varying cooling rates, and interpret CCT diagrams for optimized steel treatment decisions. The course culminates in the application of both Einstein and Arrhenius models to predict atom behavior and assess the mechanical impact of alloying elements. Designed for technical professionals and students, the program is suited for those in metallurgical, materials, or manufacturing engineering roles seeking industry-aligned skills and deep conceptual understanding.