31H19N9MVBT (EI572, 3H19N9MVBT)

Rotors, discs, bolts.

forgings, blades, fasteners, long operating at temperatures up to 630 degrees.

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Heat resistant steels and alloys	Heat resistant high alloy steel

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ti, %	Ni, %	P, %	C, %	S, %	Nb, %	Mo, %	W, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ti, %	Ni, %	P, %	C, %	S, %	Nb, %	Mo, %	W, %
GOST 5632-72	63.295–70.52	< 0.8	0.8–1.5	18–20	0.2–0.5	8–10	< 0.035	0.28–0.35	< 0.02	0.2–0.5	1–1.5	1–1.5

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$	$R\cdot 10^{-6}$ , $\Omega\cdot m$
20	205			7960
100			15.1		0.85
200			16.3		0.9
300	190		18.4		0.98
400	185	16.02	20.05		1.02
500	179	16.37	21.7		1.08
550	175
600	170	16.75	23.4		1.1
650	165
700	160	16.97	25.1		1.15
800		17.94

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
Rod	GOST 5949-75				590	295	30	40		Heating of 1140-1180 ° C, water, aging of 750-800 ° C, 15 hours, air
Forgings					700	300	35	40	600	Heat 1180 ° C, water, Aging 800 ° C, 15 hours, air
Forgings					700	300	27	30	400	Heat 1180 ° C, water, Aging 800 ° C, 15 hours, air

Technological Properties

Weldability
Weldability
Difficult to weld

Analogues

USA
USA
S63198

Standards

Standard	Description
Standard	Description
GOST 5632-72
GOST 5949-75

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Ti	%	Titan
Ni	%	Nickel
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Nb	%	Niobium
Mo	%	Molybdenum
W	%	Tungsten

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$E\cdot 10^{9}$	$MPa$	Elastic modulus
$\alpha\cdot 10^{6}$	$K^{-1}$	Coefficient of thermal (linear) expansion (range 20°C–T)
$\varkappa$	$\frac{W}{m\cdot K}$	Coefficient of thermal conductivity (the heat capacity of the material)
$\rho$	$\frac{kg}{m^3}$	The density of the material
$R\cdot 10^{-6}$	$\Omega\cdot m$	Electrical resistivity

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

Designation of types of weldability

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
no limits		Welding is performed without heating and without subsequent heat treatment
Boundedly welded		Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld		For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures