Japan S50C steel for high-strength medium carbon steel, cold deformation plastic low, welding performance, poor hardenability, but no temper brittleness, cutting performance in general. Generally used in normalizing or quenching, tempering, widely used in the manufacture of high wear resistance requirements, dynamic load and the impact of little mechanical parts and spring parts, such as forging gears, drawbars, rollers, shaft, friction plate, Agricultural plowing plow, heavy load mandrel, all kinds of cold work die pad, mold fixed plate, the standard template material, mold embryo materials.