18H12VMBFR (EI993, 2H12VMBFR)
blades of steam turbines, pipes and fasteners for long life at temperatures up to 620 degrees.; martensitic steel — ferritic class
blades of steam turbines, pipes and fasteners for long life at temperatures up to 620 degrees.; martensitic steel — ferritic class
Standard | Fe, % | Si, % | B, % | Mn, % | Cr, % | Ni, % | V, % | P, % | C, % | S, % | Nb, % | Mo, % | W, % |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Standard | Fe, % | Si, % | B, % | Mn, % | Cr, % | Ni, % | V, % | P, % | C, % | S, % | Nb, % | Mo, % | W, % |
GOST 5632-72 | 83.782–87.7 | < 0.5 | < 0.003 | < 0.5 | 11–13 | < 0.06 | 0.15–0.18 | < 0.03 | 0.15–0.22 | < 0.025 | 0.2–0.4 | 0.4–0.6 | 0.4–0.7 |
Temperature, °C | $$E\cdot 10^{9}$$, $$MPa$$ | $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ | $$\varkappa$$, $$\frac{W}{m\cdot K}$$ | $$\rho$$, $$\frac{kg}{m^3}$$ |
---|---|---|---|---|
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 | 228 | 27.6 | 7850 | |
100 | 11.15 | 21.8 | ||
200 | 215 | 11.13 | 24 | |
300 | 209 | 11.42 | 25.1 | |
400 | 195 | 11.8 | 26.3 | |
500 | 188 | 12 | 27.2 | |
600 | 173 | 12.5 | 28 | |
700 | 155 | 12.65 | 28.9 | |
800 | 11.6 |
Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{P}$$, $$MPa$$ | $$\epsilon_L$$, % | $$\psi$$, % | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | Treatment |
---|---|---|---|---|---|---|---|---|---|---|
Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{P}$$, $$MPa$$ | $$\epsilon_L$$, % | $$\psi$$, % | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | Treatment |
Trumpet | 820 | 640 | 17 | 56 | 900 | Normalization of 1050 ° C, air cooling, and Holidays 750 ° C, 3 hours, air cooling | ||||
Trumpet | 750 | 590 | 15 | 43 | 400 | Normalization of 1050 ° C, air cooling, and Holidays 750 ° C, 3 hours, air cooling | ||||
Rod | GOST 5949-75 | 60 | 740 | 490 | 12 | 45 | 390 | Hardening and tempering |
Rolling | Standard | Classifiers | Value, HBW |
---|---|---|---|
Rolling | Standard | Classifiers | Value, HBW |
Rod | GOST 5949-75 | annealing | 229 |
Standard | Description |
---|---|
Standard | Description |
GOST 5632-72 | |
GOST 5949-75 | |
TU 14-1-552-72 |
Parameter | Units of measurement | Description |
---|---|---|
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 |
Parameter | Units of measurement | Description |
---|---|---|
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 |
Parameter | Units of measurement | Description |
---|---|---|
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 |
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