60Si2CrVA spring steel to withstand high stress and temperature in the spring following the 300 ~ 350 ℃, such as the governor spring, turbine steam seal springs, crusher with spring. 60Si2CrVA steel for the production of the very important spring, such as conventional weapons to take the bomb hook spring crusher spring. 

 Chemical composition: Carbon C: 0.56 ~ 0.64 
 Spring steel (7) silicon Si: 1.40 ~ 1.80 Mn Mn: 0.40 ~ 0.70 SS: ≤ 0.030 P: ≤ 0.030 Chromium Cr: 0.90 ~ 1.20 Ni - Ni: ≤ 0.35 Copper Cu: ≤ 0.25 vanadium V: 0.10 ~ 0.20 

 Mechanical properties: tensile strength σb (MPa): ≥ 1862 (190) yield strength σs (MPa): ≥ 1666 (170) elongation δ5 (%): ≥ 6 Reduction of area ψ (%): ≥ 20 Hardness: hot-rolled + heat treatment, ≤ 321HB; Cold Drawn + heat treatment, ≤ 321HB