20HN4FA
intake valves, bolts, studs and other critical parts, operating in corrosive environments at elevated temperatures (300 to 400 ° C).
intake valves, bolts, studs and other critical parts, operating in corrosive environments at elevated temperatures (300 to 400 ° C).
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Cu, % | Ni, % | V, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Cu, % | Ni, % | V, % | P, % | C, % | S, % |
| GOST 4543-71 | 93.06–94.86 | 0.17–0.37 | 0.25–0.55 | 0.7–1.1 | < 0.3 | 3.75–4.15 | 0.1–0.18 | < 0.025 | 0.17–0.24 | < 0.025 |
| Temperature, °C | $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ | $$\varkappa$$, $$\frac{W}{m\cdot K}$$ | $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
|---|---|---|---|
| Temperature, °C | $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ | $$\varkappa$$, $$\frac{W}{m\cdot K}$$ | $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
| 20 | 0.36 | ||
| 100 | 11.7 | 38 | 0.41 |
| 200 | 12.7 | 38 | 0.48 |
| 300 | 13.7 | 37 | 0.56 |
| 400 | 35 | 0.64 | |
| 500 | 34 | 0.72 | |
| 600 | 15.4 | 31 | |
| 700 | 29 | 1.02 | |
| 800 | 28 | 1.12 | |
| 900 | 27 | 1.18 |
| 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 4543-71 | 25 | 880 | 685 | 12 | 50 | 980 | Hardening and tempering |
| Rolling | Standard | Classifiers | Value, HBW |
|---|---|---|---|
| Rolling | Standard | Classifiers | Value, HBW |
| Alloy | GOST 4543-71 | annealing | 269 |
| USA | Germany |
|---|---|
| USA | Germany |
| 3415 | 1.5752 (14NiCr14) |
| Standard | Description |
|---|---|
| Standard | Description |
| GOST 4543-71 |
| Parameter | Units of measurement | Description |
|---|---|---|
| Parameter | Units of measurement | Description |
| $$\alpha\cdot 10^{6}$$ | $$K^{-1}$$ | 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) |
| $$R\cdot 10^{-6}$$ | $$\Omega\cdot m$$ | Electrical resistivity |
| 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 |