25H1M1F (P2MA, 25H1M1FA)
One-piece rotors, shafts, wheels and others. Parts operating at temperatures up to 540 ° C, fasteners for use at temperatures up to 525 ° C
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Heat resistant steels and alloys |
Heat-resistant relaxation-resistant steel |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Cu, % |
Ni, % |
V, % |
P, % |
C, % |
S, % |
Mo, % |
|---|
| GOST 20072-74 |
95.185–96.96 |
0.17–0.37 |
0.4–0.7 |
1.5–1.8 |
< 0.2 |
< 0.3 |
0.15–0.3 |
< 0.03 |
0.22–0.29 |
< 0.025 |
0.6–0.8 |
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 |
216 |
|
|
7820 |
0.233 |
| 100 |
214 |
10.9 |
40.6 |
7800 |
0.283 |
| 200 |
210 |
12 |
39.8 |
7770 |
0.349 |
| 300 |
205 |
12.7 |
39 |
7740 |
0.428 |
| 400 |
197 |
13.65 |
37.7 |
7700 |
0.519 |
| 500 |
186 |
13.72 |
36 |
7670 |
0.633 |
| 600 |
171 |
13.82 |
33.9 |
7640 |
0.746 |
| 700 |
|
14 |
31 |
7600 |
0.862 |
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 |
|---|
| Forgings |
|
< 300 |
|
|
650 |
450 |
16 |
50 |
600 |
Normalization and high holidays |
Critical point temperatures
| Ac1, K |
Ac3(Acm), K |
|---|
| 770–805 |
840–880 |
Analogues
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 |
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 |
Description of temperatures of critical points
| Parameter |
Units of measurement |
Description |
| Ac1 |
K |
|
| Ac3(Acm) |
K |
|