This course provides a structured exploration of mechanical components with a focus on the role of steel materials in determining performance, durability, and reliability. It examines how metallurgical principles influence the behaviour of engineering steels, particularly in relation to hardenability, phase transformations, and mechanical properties. Learners analyse the impact of alloying elements and processing techniques, including heat treatment and cold forming, on the performance of components such as bearings and boron steel applications. The course also explores manufacturing routes, from raw material preparation through to finishing and inspection, highlighting how each stage contributes to final product quality. In addition, the course develops the ability to evaluate material selection decisions by linking chemical composition, processing conditions, and operational requirements. It addresses key considerations such as fatigue resistance, wear performance, and failure mechanisms, enabling informed decision-making in engineering contexts. Audience Fit: This course is intended for engineers, technicians, and professionals in materials science, manufacturing, and mechanical design who need to understand how steel properties and processing influence the performance of mechanical components.