Table 1 Properties of 65Si7 spring steel.

Material

Steel 65Si7

Tensile yield strength

1158 N/\({\text{mm}}^{2}\)

Tensile ultimate strength

1272 N/\({\text{mm}}^{2}\)

Young modulus

2.05e5 N/\({\text{mm}}^{2}\)

Poisson’s ratio

0.3

Bulk modulus

1.6667e11 Pa

Shear modulus

7.692e10 Pa

Density

7850 kg/metre cube

Behavior

Isotropic

Effective length

1050 mm

Number of leaf

4

Spring width

60 mm

Each leaf thickness

7 mm