M68 (Steel 68)

For the manufacture of rails kontrrelsovyh types RK75, RK65, RK50 used in the top structure structures track with wide gauge railway tracks

Classification

Country Section Category
CIS, Russia, Ukraine Steels for special purposes Steel for rail transport

Chemical composition

Standard Fe, % Si, % Mn, % P, % C, % S, %
GOST 18232 - 83 97.91–98.55 0.13–0.28 0.7–1 < 0.035 0.62–0.73 < 0.045

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ d5, % Treatment
Steel GOST 18232 - 83 824–883 6–7

Standards

Standard Description
GOST 18232 - 83

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
P % Phosphorus
C % Carbon
S % Sulfur

Description of mechanical properties

Parameter Units of measurement Description
d5 % Elongation at break
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength