Structural high alloy steel 15X25H19S2L
No foreign analogues
Castings are used in the manufacture of forgings of gears, pinion shafts, worm pairs, cam couplings, piston pins and other improved and cemented parts, which are subject to high strength and high surface hardness requirements, operating under impact loads and at low temperatures.
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Heat resistant steels and alloys | Heat resistant high alloy steel |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Ni, % | C, % |
|---|---|---|---|---|---|---|
| GOST 977-88 | 48.3–56.5 | 2–3 | 0.5–1.5 | 23–27 | 18–20 | < 0.2 |
Information on suppliers
Physical characteristics
| Temperature, °C | $$E\cdot 10^{9}$$, $$MPa$$ | $$\rho$$, $$\frac{kg}{m^3}$$ | Cp, Дж/кг·К |
|---|---|---|---|
| 20 | 208 | 7760 | 485 |
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{Y}$$, $$MPa$$ | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|
| Rod | TU 14-1-950-74 | 40 | Transverse | raw, hot rolling, fat, Transverse | 980–1020 | 860–880 | 12–14 |
Твёрдость по Роквеллу
| Rolling | Standard | Classifiers | Value, HRC |
|---|---|---|---|
| Rod | TU 14-1-950-74 | raw, rolling, fat, Transverse | 48–54 |
Technological Properties
| Weldability | Flake Susceptibility | Propensity to temper brittleness |
|---|---|---|
| Boundedly welded | sensitive | loathsome |
Limit operating modes
| Standard | Температура, °C |
|---|---|
| GOST 977-88 | < 250 |
Heat Treatment Modes
| Treatment |
|---|
| Hardening and tempering |
Standards
| Standard | Description |
|---|---|
| GOST 977-88 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Mn | % | Manganese |
| Cr | % | Chrome |
| Ni | % | Nickel |
| C | % | Carbon |
Description of physical characteristics
| Parameter | Units of measurement | Description |
|---|---|---|
| Cp | Дж/кг·К | Specific heat of material |
| $$E\cdot 10^{9}$$ | $$MPa$$ | Elastic modulus |
| $$\rho$$ | $$\frac{kg}{m^3}$$ | The density of the material |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| d5 | % | Elongation at break |
| $$\sigma_{Y}$$ | $$MPa$$ | Yield strength |
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
Designation of types of weldability
| 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 |