M68 (Steel 68)

For the manufacture of rails kontrrelsovyh types RK75, RK65, RK50 used in the top structure structures track with wide gauge railway tracks

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Steels for special purposes	Steel for rail transport

Standard	Fe, %	Si, %	Mn, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	P, %	C, %	S, %
GOST 18232 - 83	97.91–98.55	0.13–0.28	0.7–1	< 0.035	0.62–0.73	< 0.045

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	d5, %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	d5, %	Treatment
Steel	GOST 18232 - 83				824–883	6–7

Standard	Description
Standard	Description
GOST 18232 - 83