Steel 73V (M73V)

Designation

Name The value
Designation GOST Cyrillic 73В
Designation GOST Latin 73B
Transliteration 73V
By chemical elements 73W
Name The value
Designation GOST Cyrillic М73В
Designation GOST Latin M73B
Transliteration M73V
By chemical elements Mo73W

Description

Steel 73B is used: for the manufacture of rails Ostryakova types OR75, OR65 and OR50, used in the construction of the top structure of a railway track.

Note

M73V — hearth rail steel with vanadium.

Standards

Name Code Standards
Rails. Lining. Lining. Crutches В42 GOST 9960-85, GOST 17507-85, GOST 17508-85, GOST 26168-84

Chemical composition

Standard C S P Mn Si Fe V
GOST 9960-85 0.67-0.78 ≤0.04 ≤0.035 0.75-1.05 0.18-0.45 Rest 0.03-0.06
Fe is the basis.
According to GOST 9960-85 the rails should be made of calm open-hearth steel, deoxidized in the ladle with complex deoxidizers without the use of aluminum or other deoxidizers, which form harmful non-metallic inclusions in steel.

Mechanical properties

Section, mm σU, MPa d5, %
Mechanical properties of steel for rails types OR75, OR65 and OR50 according to GOST 9960-85 on delivery
≥900 ≥5

Description mechanical marks

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