30H3S3GML
Responsible destination highly loaded parts with a wall thickness of 30 mm, which are requirements of high strength and toughness sufficient
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 | 91.43–92.91 | 2.8–3.2 | 0.7–1.2 | 2.8–3.2 | < 0.02 | 0.29–0.33 | < 0.02 | 0.5–0.6 |
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 | 1766 | 1472 | 4 | 15 | 196 |
Heat Treatment Modes
| Treatment |
|---|
| Pretreatment - Normalization 970 - 990 ° C, Vacation 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 |