440C stainless steel is a member of the 400 series of stainless steels. It has the highest carbon content of all the stainless steel alloys and is hardened by heat treatment. 440C offers high strength, hardness, and excellent wear resistance. It’s often used in high-wear applications like cutlery, bearings and races, bushings, valve components, surgical instruments, and molds and dies. This stainless steel is not recommended for use at high temperatures (typically higher than 400°C) to avoid reduction of its corrosion and impact resistance.