Steel 73Ц (M73C)

Designation

Name The value
Designation GOST Cyrillic 73Ц
Designation GOST Latin 73Ts
Transliteration 73Ts
By chemical elements 73Zn
Name The value
Designation GOST Cyrillic М73Ц
Designation GOST Latin M73Ts
Transliteration M73Ts
By chemical elements Mo73Zn

Description

73Ц 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

M73C — steel open-hearth rail with Zirconia.

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 Zr
GOST 9960-85 0.67-0.78 ≤0.04 ≤0.035 0.75-1.05 0.18-0.45 Rest 0.001-0.05
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.
The zirconium content in the range from 0.001% to 0.01% in steel is determined from the calculation of its input of not less than 80 grams per ton of liquid 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