3K-7

For the production of cold drawn wire, used for the manufacture of springs are wound in a cold state and not be quenched.

Classification

Country Section Category
CIS, Russia, Ukraine Structural steel Spring-spring structural steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % P, % C, % S, %
GOST 9389-75 > 97.88 0.17–0.37 0.5–0.8 < 0.05 < 0.04 < 0.05 < 0.02 0.68–0.76 < 0.03

Information on suppliers

Standards

Standard Description
GOST 9389-75 GOST 9389 - 75

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Cu % Copper
Ni % Nickel
P % Phosphorus
C % Carbon
S % Sulfur