38HN3MA
Shafts, axles, gears and other large special performance parts.
Shafts, axles, gears and other large special performance parts.
Standard | Fe, % | Si, % | Mn, % | Cr, % | Cu, % | Ni, % | P, % | C, % | S, % | Mo, % |
---|---|---|---|---|---|---|---|---|---|---|
GOST 4543-71 | 93.63–95.5 | 0.17–0.37 | 0.25–0.5 | 0.8–1.2 | < 0.3 | 2.75–3.25 | < 0.025 | 0.33–0.4 | < 0.025 | 0.2–0.3 |
Temperature, °C | $$E\cdot 10^{9}$$, $$MPa$$ | $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ | $$\varkappa$$, $$\frac{W}{m\cdot K}$$ | $$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ | $$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
---|---|---|---|---|---|
20 | 207 | 36 | 0.292 | ||
100 | 203 | 11.8 | 36 | 0.496 | 0.317 |
200 | 196 | 12.3 | 36 | 0.508 | 0.358 |
300 | 192 | 12.7 | 35 | 0.525 | 0.425 |
400 | 182 | 13.1 | 34 | 0.538 | 0.506 |
500 | 173 | 13.4 | 33 | 0.567 | 0.602 |
600 | 167 | 13.7 | 31 | 0.601 | 0.742 |
700 | 147 | 13.9 | 30 | 0.672 | 0.89 |
800 | 135 | 10.8 | 29 | 0.697 | 1.1 |
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 | 1080 | 980 | 12 | 50 | 780 | Hardening and tempering |
Rolling | Standard | Classifiers | Value, HBW |
---|---|---|---|
Alloy | GOST 4543-71 | annealing | 269 |
Standard | Description |
---|---|
GOST 4543-71 |
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) |
$$c\cdot 10^{-3}$$ | $$\frac{J}{kg\cdot K}$$ | The specific heat of the material (range 20°C–T) |
$$R\cdot 10^{-6}$$ | $$\Omega\cdot m$$ | Electrical resistivity |
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 |