Chrome Silicon

ASTM - A401 is best suited for applications that must withstand shock loads, high stress, and temperature environments. It has a high tensile strength and resilience to higher temperature.

This alloy is cold drawn and heat treated, which makes it stronger and maintains the consistent performance for a longtime even under repeated spring loads.

Technical Specification Chrome Silicon
Nominal Composition

C: 0.51 - 0.59

Cr: 0.60 - 0.80

Si: 1.20 - 1.60


0.284 lb./in3

Modulus of Elasticity (E)

30 x 106 psi

Modulus of Rigidity (G)

11.5 x 106 ksi

Coefficient of Expansion


Electrical Resistivity

32.3 µΩ.in

Thermal Conductivity

108 Btu/(hr/ft2/in/°F)

Min Size

0.016 in (0.406 mm)

Max Temp

246oC (475oF)


It is used for lightly stressful applications, but can handle more stress and heat that other spring wires like music wires.