HN77TYURU (EI437BU, HN77TYURU-VD, EI437BU-VD, HN77TYURU-PD, EI437BU-PD)

Disks, turbine blades and other parts operating up to 750 ° C.

Classification

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, %
GOST 5632-72 < 1 < 0.6 < 0.01 < 0.4 19–22 2.6–2.9 71.967–77.66 0.7–1 < 0.001 < 0.02 < 0.015 0.04–0.08 < 0.007

Information on suppliers

Physical characteristics

Temperature, °C $$\alpha\cdot 10^{6}$$, $$K^{-1}$$
100 12.6
200 12.9
300 13.3
400 13.8
500 14.2
600 14.6
700 15.1
800 15.5
900 16.2
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
Rod GOST 23705 - 79 980 640–670 12–13 14–16 294 Quenching and aging

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Rod GOST 23705 - 79 Hardening, aging 262–321

Analogues

Germany USA
BGH 2.4952 Nickelvac 80 A

Standards

Standard Description
GOST 5632-72
GOST 23705 - 79
GOST 5632-14
TU 14-1-1531-76
TU 14-1-669-73
TU 14-1-684-73
TU 14-143-484-95

Description of chemical elements

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
$$\alpha\cdot 10^{6}$$ $$K^{-1}$$ Coefficient of thermal (linear) expansion (range 20°C–T)

Description of mechanical properties

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