Steel 70 (M70)

Designation

Steel 70 used: for the manufacture of rails types of R38 and R43 for the coal, mining and other industries.

M70 — steel open-hearth rail.

Name	Code	Standards
Rails. Lining. Lining. Crutches	В42	GOST 30165-94

Standard	C	S	P	Mn	Si	Fe
GOST 30165-94	0.6-0.8	≤0.05	≤0.04	0.5-1	0.05-0.17	Rest

Fe is the basis.

Section, mm	σ_U, MPa	d₅, %
Mechanical properties of steel for rails types of R38 and R43 for the coal and mining industry according to GOST 30165-94
	≥765	≥4

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

Temperature	r, kg/m³
20	7850

Name	Description
Е	The normal elasticity modulus
l	Coefficient of thermal conductivity
R	UD. the resistivity