20GNMFL
casting, designed for operation at low temperatures and high loading rates — weldments of large sections bandages cement kilns
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Steels and alloys for castings | Ordinary steel for castings |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Ni, % | V, % | P, % | C, % | S, % | Mo, % |
|---|---|---|---|---|---|---|---|---|---|---|
| GOST 977-88 | 96.45–98.05 | 0.2–0.4 | 0.7–1.2 | < 0.3 | 0.7–1 | 0.06–0.12 | < 0.03 | 0.14–0.22 | < 0.03 | 0.15–0.25 |
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 | 589 | 491 | 15 | 33 | 491 | Normalization of 910-930 ° C, 600-650 ° C and Holidays | |||
| Castings | GOST 977-88 | 687 | 589 | 14 | 30 | 589 | Tempering 910-930 ° C, 640-660 ° C and Holidays |
Brinell hardness number
Heat Treatment Modes
| Treatment |
|---|
| Normalization 910 - 930 ° C, Release 600 - 650 ° C |
| Tempering 910 - 930 ° C, Vacation 640 - 660 ° C |
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 |
| V | % | Vanadium |
| 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 |