40H15N7G7F2MS (EI388, 4H15N7G7F2MS)
gas turbine blades, fasteners, operating at a temperature of 650 degrees C for a limited time; austenitic steel
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Heat resistant steels and alloys |
Heat resistant high alloy steel |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Cu, % |
Ni, % |
V, % |
P, % |
C, % |
S, % |
Mo, % |
W, % |
|---|
| GOST 5632-72 |
62.725–70.57 |
0.9–1.4 |
6–8 |
14–16 |
< 0.3 |
6–8 |
1.5–1.9 |
< 0.035 |
0.38–0.47 |
< 0.02 |
0.65–0.95 |
< 0.2 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$E\cdot 10^{9}$$, $$MPa$$ |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
$$\rho$$, $$\frac{kg}{m^3}$$ |
|---|
| 20 |
185 |
|
|
7800 |
| 100 |
|
17 |
14 |
7770 |
| 200 |
187 |
17.7 |
16 |
7720 |
| 300 |
157 |
18.4 |
18 |
7680 |
| 400 |
147 |
19.1 |
20 |
7630 |
| 500 |
147 |
20.5 |
22 |
7580 |
| 600 |
147 |
20.8 |
24 |
7530 |
| 700 |
118 |
|
26 |
|
| 800 |
118 |
|
|
|
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 5949-75 |
60 |
|
|
880 |
590 |
15 |
15 |
290 |
Hardening of 1170-1190 ° C, water, aging of 780-820 ° C, 8-10 hours, the air |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Cu |
% |
Copper |
| Ni |
% |
Nickel |
| V |
% |
Vanadium |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| Mo |
% |
Molybdenum |
| W |
% |
Tungsten |
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 |
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 |