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	σ_U, 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
σ_U	Limit short-term strength
d₅	Elongation after rupture