18H11MNFB (EP291, 2H11MFBN)
High-loaded parts, turbine blades.
highly loaded parts for steam and gas turbines, long operating at temperatures up to 600 ° C.; martensitic steel grade
High-loaded parts, turbine blades.
highly loaded parts for steam and gas turbines, long operating at temperatures up to 600 ° C.; martensitic steel grade
Standard | Fe, % | Si, % | Mn, % | Cr, % | Ni, % | V, % | P, % | C, % | S, % | Nb, % | Mo, % |
---|---|---|---|---|---|---|---|---|---|---|---|
Standard | Fe, % | Si, % | Mn, % | Cr, % | Ni, % | V, % | P, % | C, % | S, % | Nb, % | Mo, % |
GOST 5632-72 | 83.685–87.55 | < 0.6 | 0.6–1 | 10–11.5 | 0.5–1 | 0.2–0.4 | < 0.03 | 0.15–0.21 | < 0.025 | 0.2–0.45 | 0.8–1.1 |
Temperature, °C | E\cdot 10^{9}, MPa | \alpha\cdot 10^{6}, K^{-1} | \varkappa, \frac{W}{m\cdot K} | \rho, \frac{kg}{m^3} | c\cdot 10^{-3}, \frac{J}{kg\cdot K} |
---|---|---|---|---|---|
Temperature, °C | E\cdot 10^{9}, MPa | \alpha\cdot 10^{6}, K^{-1} | \varkappa, \frac{W}{m\cdot K} | \rho, \frac{kg}{m^3} | c\cdot 10^{-3}, \frac{J}{kg\cdot K} |
20 | 228 | 7850 | |||
100 | 222 | 10.3 | 21.4 | 0.485 | |
200 | 213 | 10.6 | 25.1 | 0.53 | |
300 | 205 | 10.8 | 25.9 | 0.59 | |
400 | 193 | 11.3 | 26.3 | 0.667 | |
500 | 180 | 11.7 | 27.2 | 0.77 | |
600 | 11.8 | 28 | 0.9 | ||
700 | 12 | ||||
800 | 12.4 |
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 |
Rod | GOST 5949-75 | 740 | 590–735 | 15 | 50 | 590 | Hardening of 1080-1130 ° C, air Accommodation 660-770 ° C, air | |||
Rod | GOST 18968-73 | 740 | 590–735 | 15 | 50 | 590 | Normalized and tempered |
Rolling | Standard | Classifiers | Value, HBW |
---|---|---|---|
Rolling | Standard | Classifiers | Value, HBW |
Rod | GOST 5949-75 | annealing | 225 |
Rod | GOST 18968-73 | normalization, average vacation | 229–269 |
Germany |
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Germany |
1.4923 (X22CrMoV12-1) |
Standard | Description |
---|---|
Standard | Description |
GOST 5632-72 |
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 |
c\cdot 10^{-3} | \frac{J}{kg\cdot K} | The specific heat of the material (range 20°C–T) |
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 |