60Si2CrA spring steel, compared with Si-Mn steel, while plastic similar, with high tensile strength and yield strength, greater hardenability of steel, have temper brittleness. 60Si2CrA to withstand high stress and temperature at 300 ~ 350 ℃ the following spring, such as the governor springs, turbine steam seal springs, disc springs high-pressure water pump, condenser bearing springs and other spring breakers to use.

Chemical composition
Carbon C: 0.56 ~ 0.64


Si Si: 1.40 ~ 1.80


Manganese Mn: 0.40 ~ 0.70


Sulfur S: ≤ 0.030


Phosphorus P: ≤ 0.030


Chromium Cr: 0.70 ~ 1.00


Ni-Ni: ≤ 0.35


Copper Cu: ≤ 0.25

Mechanical properties
Tensile strength σb (MPa): ≥ 1764 (180)


Yield strength σs (MPa): ≥ 1568 (160)


Elongation δ5 (%): ≥ 6


Reduction of area ψ (%): ≥ 20


Hardness: hot-rolled + heat treatment, ≤ 321HB; cold-drawn + heat treatment, ≤ 321HB

Standard heat treatment and microstructure
Standard heat treatment: quenching 870 ℃ ± 20 ℃, oil cooling; tempering 420 ℃ ± 50 ℃ (special needs, ± 30 ℃).

60si2cra density ρ = 7.81 g / cc, the steel can be cold rolled into plate, strip and wire, making the spring. 60si2cra can also be made ​​into such fitter's chisel, stylus and other tools. 60si2cra can be made of steel section size is generally about 8 ~ 15mm small springs such as various small flat, round springs, bottom spring pads, spring winding.