38HA
Worm gears, gears, shafts, axles, bolts and other responsible improves the detail.
Worm gears, gears, shafts, axles, bolts and other responsible improves the detail.
Standard | Fe, % | Si, % | Mn, % | Cr, % | Cu, % | Ni, % | P, % | C, % | S, % |
---|---|---|---|---|---|---|---|---|---|
GOST 4543-71 | 96.66–98.18 | 0.17–0.37 | 0.5–0.8 | 0.8–1.1 | < 0.3 | < 0.3 | < 0.025 | 0.35–0.42 | < 0.025 |
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 | 588 | 14 | ||||||||
Rod | GOST 4543-71 | 25 | 930 | 780 | 12 | 50 | 880 | Tempering 860 ° C, oil, leave 550 ° C, the water | ||
The bar is calibrated. | GOST 10702-78 | 590 | 60 | Annealing |
Rolling | Standard | Classifiers | Value, HBW |
---|---|---|---|
Alloy | GOST 4543-71 | annealing | 207 |
The bar is hot rolled. | GOST 10702-78 | 1870 |
USA | Germany |
---|---|
G51350 | 1.7034 (37Cr4) |
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 |
$$R\cdot 10^{-6}$$ | $$\Omega\cdot m$$ | 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 |