Different grades of spring steel wire is used in various fields: Spring steel wire with low tensile strength is mainly used for tension, compression or torsion springs, which are predominantly subjected to low static stress. Spring steel wire with medium tensile strength is used for tension, compression or torsion springs, which are subjected to medium high static stresses or rarely to dynamic stresses, also for wire forms requiring severe bending. Spring wire with high tensile strength is used for tension springs, compression springs, torsion springs, wire forms that are subjected to high static stresses or medium level dynamic stresses.