38HGNM
for the production of special fasteners, shafts, axles and other critical parts of mining and smelting and oil drilling equipment, which are requirements of high strength.
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Structural steel | Alloyed structural steel |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Cu, % | Ni, % | P, % | C, % | S, % | Mo, % |
|---|---|---|---|---|---|---|---|---|---|---|
| GOST 10702-78 | 96.48–98.01 | 0.17–0.37 | 0.5–0.8 | 0.4–0.6 | < 0.3 | 0.4–0.7 | < 0.035 | 0.37–0.43 | < 0.035 | 0.15–0.25 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\psi$$, % | Treatment |
|---|---|---|---|---|---|---|---|
| The steel is calibrated. | GOST 10702-78 | 686 | 60 | Annealing |
Analogues
| USA | Germany |
|---|---|
| 8740 | 1.6546 (40NiCrMo2-2) |
Standards
| Standard | Description |
|---|---|
| GOST 10702-78 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Mn | % | Manganese |
| Cr | % | Chrome |
| Cu | % | Copper |
| Ni | % | Nickel |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
| Mo | % | Molybdenum |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
| $$\psi$$ | % | Reduction in cross section on fracture |