20HNR
gears, shafts, gears, worms, cam clutches, rollers, fingers, plugs and other large loaded parts operating under impact loads.
gears, shafts, gears, worms, cam clutches, rollers, fingers, plugs and other large loaded parts operating under impact loads.
| Standard | Fe, % | Si, % | B, % | Mn, % | Cr, % | Ti, % | Cu, % | Ni, % | P, % | C, % | S, % |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Standard | Fe, % | Si, % | B, % | Mn, % | Cr, % | Ti, % | Cu, % | Ni, % | P, % | C, % | S, % |
| GOST 4543-71 | 95.865–97.569 | 0.17–0.37 | 0.001–0.005 | 0.6–0.9 | 0.7–1.1 | < 0.06 | < 0.3 | 0.8–1.1 | < 0.035 | 0.16–0.23 | < 0.035 |
| Rolling | Standard | Size, mm | Tension | Classifiers | \sigma _{U} |
\sigma_{P} |
\epsilon_L |
\psi |
KCU\cdot 10^{3} |
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 | 25 | 1420 | 1370 | 14 | 60 | 1080 | Normalization 930 ° C, air Tempering 840 ° C, oil, leave 200 ° C, air | |||
| Rod | 75 | 1060 | 970 | 15 | 60 | 1080 | Normalization 930 ° C, air Tempering 840 ° C, oil, leave 200 ° C, air | |||
| Rod | GOST 4543-71 | 15 | 1180 | 980 | 10 | 50 | 880 | Hardening and tempering |
| Rolling | Standard | Classifiers | Value, HBW |
|---|---|---|---|
| Rolling | Standard | Classifiers | Value, HBW |
| Hire | GOST 4543-71 | 1 |
| Standard | Description |
|---|---|
| Standard | Description |
| GOST 4543-71 |
| 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 |