For over 50 years, M & S Spring Company has manufactured torsion springs, compression springs, and extension springs using hard drawn carbon steel wire. Hard drawn wire springs have an average stress load and perform well for most applications. Hard drawn carbon steel is a medium carbon, cold drawn wire that is ideal for commercial springs. M & S Spring Company’s hard drawn wire springs meet ASTM A227 standards.

Extension Spring Hooks

M & S Spring manufactures several types of hard drawn springs including:

Hard Drawn Wire Spring Properties

Nominal Chemistry C 0.45-0.85%
Mn 0.60%-1.30%
Minimum Tensile Strength
psi (MPa)
CLI 147-283
CLII 171-324
Modulus of Elasticity
psi (MPa)
30 (207)
Modulus in Torsion
psi (MPa)
11.5 (79.3)
Maximum Operating Temperature 250°F/121°C
Rockwell Hardness C31-52
Specifications ASTM A 227