20A

for the production of seamless hot gas pipes increased corrosion resistance and cold resistance

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Structural steel	Carbonaceous quality structural steel

Standard	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %
Standard	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %
GOST 21729 - 76	0.17–0.37	0.35–0.65	< 0.25	< 0.25	< 0.035	0.17–0.24	< 0.035

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	d5, %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	d5, %	Treatment
Trumpet	GOST 21729 - 76				392	22

Standard	Description
Standard	Description
GOST 21729 - 76