30G
Improves the detail, which are requirements of low strength: thrust axis, cylinders, wheels, bolts, nuts, screws and others.
Improves the detail, which are requirements of low strength: thrust axis, cylinders, wheels, bolts, nuts, screws and others.
Standard | Fe, % | Si, % | Mn, % | Cr, % | Cu, % | Ni, % | P, % | C, % | S, % |
---|---|---|---|---|---|---|---|---|---|
GOST 4543-71 | 97.31–98.86 | 0.17–0.37 | 0.7–1 | < 0.3 | < 0.3 | < 0.3 | < 0.035 | 0.27–0.35 | < 0.035 |
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 | 204 | 7810 | |||
100 | 12.6 | 76 | 0.47 | ||
200 | 13.9 | 65 | 0.483 | ||
300 | 14.6 | 53 | 0.546 | ||
400 | 15 | 44 | 0.601 | ||
500 | 15.5 | 38 | 0.764 | ||
600 | 15.6 | ||||
700 | 14.8 |
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 | 540 | 315 | 20 | 45 | 780 | Tempering 860 ° C, the water, leave 600 ° C, air |
Rolling | Standard | Classifiers | Value, HBW |
---|---|---|---|
Alloy | GOST 4543-71 | annealing | 197 |
The plates | GOST 1577-93 | normalization | 217 |
The plates | GOST 1577-93 | annealing | 1870 |
USA | Germany |
---|---|
G10330 | 1.1170 (28Mn6) |
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) |
$$\rho$$ | $$\frac{kg}{m^3}$$ | 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 |
---|---|---|
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 |