Steel 73Т (M73T)

Designation

Name The value
Designation GOST Cyrillic 73Т
Designation GOST Latin 73T
Transliteration 73T
By chemical elements 73Ti
Name The value
Designation GOST Cyrillic М73Т
Designation GOST Latin M73T
Transliteration M73T
By chemical elements Mo73Ti

Description

73 Т steel 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

M73T — steel open-hearth rail with titanium.

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 Ti
GOST 9960-85 0.67-0.78 ≤0.04 ≤0.035 0.75-1.05 0.18-0.45 Rest 0.007-0.015
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