0N9

vessels and devices working under pressure at temperatures up to -196 ° C

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Structural steel	Cryogenic structural steel

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Ni, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Ni, %	P, %	C, %	S, %
TU 14-105-846-2008	89.43–90.88	0.17–0.37	0.45–0.6	8.5–9.5	< 0.02	< 0.06	< 0.02

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Alloy					720	520	28	82	2530	Double normalization with tempering
Alloy					600	450	27	79	1960	Hardened and tempered

Analogues

Germany	USA
Germany	USA
G-X 8 Ni 9	X7Ni9

Standards

Standard	Description
Standard	Description
TU 14-105-846-2008

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Ni	%	Nickel
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\sigma_{P}$	$MPa$	Proportionality limit
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture
$KCU\cdot 10^{3}$	$\frac{J}{m^2}$	Impact toughness