HN77TYUR (EI437B)
Disks, turbine blades, parts of aircraft engines.
Discs, rings, 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 |
2.4–2.8 |
70.076–77.4 |
0.6–1 |
< 0.001 |
< 0.02 |
< 0.015 |
< 0.07 |
< 0.007 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$E\cdot 10^{9}$$, $$MPa$$ |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
$$\rho$$, $$\frac{kg}{m^3}$$ |
$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
|---|
| 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 |
|---|
| 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 |
| Rod |
GOST 23705 - 79 |
Hardening |
255–321 |
Technological Properties
| Weldability |
|---|
| Difficult to weld |
Analogues
Standards
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 |
| $$E\cdot 10^{9}$$ |
$$MPa$$ |
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 |
| $$\sigma _{U}$$ |
$$MPa$$ |
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 |
| 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 |
|
|