The strength of spring wire spring steel wire varies with varieties, standards and specifications, and the tensile strength grade can be in the range of 1000-3000 MPa.
The diameter range of round spring wire is 0.08-20 mm.
The cross-section shape of spring steel wire is generally round, and there are also rectangular, square, ovate and other shapes. The finished steel wire is generally delivered in a roll or in a straight strip.
Spring used in specific environment, there will be some special requirements for steel wire, for example: the spring used in corrosive medium must have good corrosion resistance. The instrument should have high sensitivity, low sensitivity and long-term stability. The spring working at high temperature is required to keep enough elastic limit and good creep resistance at high temperature.