Stainless Round Bar 17-4 H1150 is heat treated to 1150 degrees F for 4 hours and then air cooled. The H1150 heat treatment is used when cold forming is required as it will not require further heat treatment. The combination of strong mechanical and fabrication properties make stainless 17-4 a versatile material for applications that require extensive machining and welding. It is typically used in gate valves, chemical processing equipment, pump shafts, gears, ball bearings, bushings, and fasteners.