The strength of spring steel wire varies depending on the type, standard, and specification, with tensile strength ranging from 1000 to 3000 MPa. The diameter of round spring steel wire ranges from 0.08 to 20 mm. The cross-sectional shape of spring steel wire is generally circular, but rectangular, square, and oval shapes are also available. Finished wire is usually delivered in coils, but it is also sometimes delivered in straight strips.
Springs used in different environments have different specific requirements for the steel wire. For example, springs operating in corrosive media require good corrosion resistance; springs in precision instruments require long-term stability and sensitivity; and springs in high-temperature environments require sufficient elastic limit and creep resistance.
