HN77TYUR (EI437B)

Disks, turbine blades, parts of aircraft engines.

Discs, rings, blades and other parts operating up to 750 ° C.

Classification

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

Chemical composition

Standard	Fe, %	Si, %	B, %	Mn, %	Cr, %	Ti, %	Ni, %	Al, %	Pb, %	Ce, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	B, %	Mn, %	Cr, %	Ti, %	Ni, %	Al, %	Pb, %	Ce, %	P, %	C, %	S, %
GOST 5632-72	< 1	< 0.6	< 0.01	< 0.4	19–22	2.4–2.8	70.076–77.4	0.6–1	< 0.001	< 0.02	< 0.015	< 0.07	< 0.007

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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	196		12.6	8200
100		12.67	13.9	8180	1.247
200		12.9	15.6	8140	1.262
300		13.3	17.2	8110	1.282
400		13.8	18.8	8070	1.3
500		14.2	20.9	8040	1.308
600	157	14.6	23.5	8000	1.288
700	147	15.1	25.1	7960	1.272
800	128	15.5	28.2	7920	1.253
900		16.2	31.1	7870	1.232
1000		16.8

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
Sheet	GOST 24982-81	< 3.9			930		20			Hardening of 1080-1120 ° C, cooling water, Aging 750 ° C, 5 hours
Rod	GOST 23705 - 79				740	620	15	20	400	Hardening 1080 ° C, for 8 hours, the air aging of 700 ° C, 16 hours, air

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Rod	GOST 23705 - 79	Hardening	255–321

Technological Properties

Weldability
Weldability
Difficult to weld

Analogues

Germany
Germany
2.4952

Standards

Standard	Description
Standard	Description
GOST 5632-72
GOST 14162-1979
GOST 23705 - 79
GOST 24982-81
GOST 5632-14
TU 14-1-1465-75
TU 14-1-1531-76
TU 14-1-2918-80
TU 14-1-402-72
TU 14-1-75-71
TU 14-1-895-74
TU 14-131-904-96

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
B	%	Bor
Mn	%	Manganese
Cr	%	Chrome
Ti	%	Titan
Ni	%	Nickel
Al	%	Aluminium
Pb	%	Lead
Ce	%	Cerium
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur

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