12x8

Cold-deformed pipe hardness 12X8 (GOST 550−75) HB 10 ^-1 = 170 MPa.

For the production of seamless pipes for the refining and petrochemical industries.

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Structural steel	Low alloy structural steel for welded structures

Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	P, %	C, %	S, %
GOST 550-75	91–91.3	0.17–0.37	0.3–0.6	7.5–9	< 0.25	< 0.4	< 0.035	< 0.12	< 0.03

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	d5, %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	d5, %	Treatment
Pipes are coldly deformed.	GOST 550-75				392	216	22

Standard	Description
Standard	Description
GOST 550-75