E109
MPa
α106
K1
ϰ
WmK
ρ
kgm3
σU
MPa
σP
MPa
ϵL
ψ
KCU103
Jm2

HN70VMTYUF (EI826)

Turbine blades.

Turbine blades and other heavy duty parts for operation at temperatures up to 800 ° 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, % V, % Al, % Ce, % P, % C, % S, % Mo, % W, %
GOST 5632-72 < 5 < 0.6 < 0.015 < 0.5 13–16 1.7–2.2 60.621–75.2 0.2–1 2.4–2.9 < 0.02 < 0.015 < 0.12 < 0.009 2.5–4 5–7

Information on suppliers

Physical characteristics

Temperature, °C E\cdot 10^{9}E109, MPaMPa \alpha\cdot 10^{6}α106, K^{-1}K1 \varkappaϰ, \frac{W}{m\cdot K}WmK \rhoρ, \frac{kg}{m^3}kgm3
20 200 8.8 8470
100 10.4 10.5
200 11.7 12.6
300 12.4 14.2
400 12.9 16.3
500 170 13.2 18.4
600 165 13.6 20.5
700 155 14 22.6
800 145 14.5 25.1
900 130 15 28

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}σU, MPaMPa \sigma_{P}σP, MPaMPa \epsilon_LϵL, % \psiψ, % KCU\cdot 10^{3}KCU103, \frac{J}{m^2}Jm2 Treatment
Rod GOST 23705 - 79 1030 705 10 12 196

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Alloy GOST 23705 - 79 Hardening 299–341

Technological Properties

Weldability
Difficult to weld

Standards

Standard Description
GOST 5632-72
TU 14-1-402-72
TU 14-1-223-72
GOST 23705 - 79
GOST 5632-14

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
B % Bor
Mn % Manganese
Cr % Chrome
Ti % Titan
Ni % Nickel
V % Vanadium
Al % Aluminium
Ce % Cerium
P % Phosphorus
C % Carbon
S % Sulfur
Mo % Molybdenum
W % Tungsten

Description of physical characteristics

Parameter Units of measurement Description
E\cdot 10^{9}E109 MPaMPa Elastic modulus
\alpha\cdot 10^{6}α106 K^{-1}K1 Coefficient of thermal (linear) expansion (range 20°C–T)
\varkappaϰ \frac{W}{m\cdot K}WmK Coefficient of thermal conductivity (the heat capacity of the material)
\rhoρ \frac{kg}{m^3}kgm3 The density of the material

Description of mechanical properties

Parameter Units of measurement Description
\sigma _{U}σU MPaMPa Ultimate tensile strength
\sigma_{P}σP MPaMPa Proportionality limit
\epsilon_LϵL % Elongation at break (longitudinal)
\psiψ % Reduction in cross section on fracture
KCU\cdot 10^{3}KCU103 \frac{J}{m^2}Jm2 Impact toughness

Designation of types of weldability

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