Our main 65mn 65mn spring steel spring steel 60 Second silicon manganese steel spring used in the shock, vibration, or long-term cross-stress, it requires a high spring steel tensile strength, elastic limit, high fatigue strength. In the process requires a certain degree of spring steel hardenability, easy removal, good surface quality carbon spring steel that is the carbon content of WC within the range of 0.6% -0.9% quality carbon structural steel. Silico-manganese alloy spring steel is mainly the Department of steel, their lower carbon content, mainly by increasing the silicon content Wsi improve performance; in addition to Ge, tungsten, vanadium alloy spring steel. In recent years, combined with our resources and in accordance with the design requirements of new technologies in automobiles, tractors, developed a boron, niobium, molybdenum and other elements in silico-manganese steel, based on new steel to extend the spring of life and improve the quality of the spring !!