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, % |
---|---|---|---|---|---|---|---|---|---|
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 |
Temperature, °C | E\cdot 10^{9}, MPa | \alpha\cdot 10^{6}, K^{-1} | \varkappa, \frac{W}{m\cdot K} | \rho, \frac{kg}{m^3} | R\cdot 10^{-6}, \Omega\cdot m |
---|---|---|---|---|---|
Temperature, °C | E\cdot 10^{9}, MPa | \alpha\cdot 10^{6}, K^{-1} | \varkappa, \frac{W}{m\cdot K} | \rho, \frac{kg}{m^3} | R\cdot 10^{-6}, \Omega\cdot m |
20 | 196 | 7850 | 0.29 | ||
100 | 12.7 | 50 | |||
200 | 13.1 | 46 | 7800 | ||
300 | 13.5 | 42 | |||
400 | 13.8 | 40 | |||
500 | 14.2 | 37 | |||
600 | 14.6 | 35 | 7650 | ||
700 | 31 |
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 |
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 |
---|---|---|---|
Rolling | Standard | Classifiers | Value, HBW |
Alloy | GOST 4543-71 | annealing | 207 |
The bar is hot rolled. | GOST 10702-78 | 1870 |
USA | Germany |
---|---|
USA | Germany |
G51350 | 1.7034 (37Cr4) |
Standard | Description |
---|---|
Standard | Description |
GOST 4543-71 |
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 |
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 |