27H5GSML
highly loaded parts critical applications with a wall thickness up to 50 mm, working in conditions of shock and impact-abrasive wear
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Steels and alloys for castings | Ordinary steel for castings |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | P, % | C, % | S, % | Mo, % |
|---|---|---|---|---|---|---|---|---|
| GOST 977-88 | 91.18–92.41 | 0.9–1.2 | 0.9–1.2 | 5–5.5 | < 0.02 | 0.24–0.28 | < 0.02 | 0.55–0.6 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{P}$$, $$MPa$$ | $$\epsilon_L$$, % | $$\psi$$, % | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | Treatment |
|---|---|---|---|---|---|---|---|---|---|---|
| Castings | GOST 977-88 | 1472 | 1177 | 5 | 20 | 392 |
Heat Treatment Modes
| Treatment |
|---|
| Pretreatment - Normalization 970 - 990 ° C, Release 700 - 720 ° C |
| Final processing - Hardening 980 - 1000 ° C, Release 200 - 220 ° C |
Standards
| Standard | Description |
|---|---|
| GOST 977-88 |
Description of chemical elements
| Element | Units of measurement | Description |
|---|---|---|
| Fe | % | Iron |
| Si | % | Silicon |
| Mn | % | Manganese |
| Cr | % | Chrome |
| P | % | Phosphorus |
| C | % | Carbon |
| S | % | Sulfur |
| Mo | % | Molybdenum |
Description of mechanical properties
| 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 |