416 stainless steel is a hardenable chromium steel which elements have been added to improve the machinability and non-galling characteristics. This grade is magnetic in all conditions. Phosphorus and sulphur have been added to produce a free machining stainless steel. A wide range of mechanical properties may be obtained by conventional heat treating methods. Manufactured by the electric-furnace process, it is a quality steel, free from all injurious defects, and meets the requirements of the aircraft industry.