Stainless steel alloy 416 is a free-machining martensitic grade containing about 13% chromium. It is characterized by its excellent machinability, making it the preferred choice for parts and components that require intricate machining operations. While alloy 416 offers good corrosion resistance in mild environments, it falls short compared to other stainless steel grades with higher chromium content. However, its high sulfur content may affect its weldability. Stainless steel alloy 416 finds extensive applications in industries such as firearms, gears, nuts, bolts, and fasteners, where its combination of machinability and moderate corrosion resistance is valued. Despite its limitations, alloy 416 remains a suitable option for specific applications that prioritize ease of machining over other properties.