Steel 68 (M68)

Designation

Name The value
Designation GOST Cyrillic 68
Designation GOST Latin 68
Transliteration 68
By chemical elements 68
Name The value
Designation GOST Cyrillic М68
Designation GOST Latin M68
Transliteration M68
By chemical elements Mo68

Description

68 steel is used: for the manufacture of rails kontrrelsovye types RK75, RK65 and RK50, used in the construction of the permanent way with rail rail broad gauge.

Note

M68 — steel open-hearth rail.

Standards

Name Code Standards
Rails. Lining. Lining. Crutches В42 GOST 9797-85, GOST 9798-85, GOST 18232-83, GOST 26110-84

Chemical composition

Standard C S P Mn Si Fe
GOST 18232-83 0.62-0.73 ≤0.045 ≤0.035 0.7-1 0.13-0.28 Rest
Fe is the basis.
The rails should be made from open-hearth steel, completely deoxidized, calm steel.

Mechanical properties

Section, mm σU, MPa d5, %
Mechanical properties of steel for rails type RK75, RK65 and RK50 according to GOST 18232-83 on delivery
≥840 ≥7

Description mechanical marks

Name Description
σU Limit short-term strength
d5 Elongation after rupture